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  • 951.
    Salomonsson, Kent
    Högskolan i Skövde, Institutionen för teknik och samhälle.
    Meso-Mechanical Modeling and Analysis of Adhesive Layers2007Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis is concerned with the modeling, simulation and analysis of adhesive layers. By use of an in situ scanning electron microscopy study it is found that the adhesive studied in the present thesis has a very complex structure with two different compounds, a mineral and an epoxy/thermoplastic blend. A representative volume element (RVE) model is developed to study the behavior of the adhesive layer at the meso-level. It is a continuum model where interface finite elements are implemented at the boundaries of the continuum elements in order to enable crack initiation and propagation of micro cracks. On a structural level, two deformation modes, modes I and II, dominate the behavior of thin adhesive layers. With the RVE it is possible reproduce experimental stress-deformation relations from both modes. However, in a real structure, mixed mode loading usually occur. A range of mode mixes is studied, using the RVE, from an un-loaded state until fracture of the layer. The results indicate that the behavior of the interface elements dominate for mode mixes close to mode I and plasticity in the continuum elements dominates for mode II dominated mode mixes. Furthermore, effects of large root curvatures of the adherends is analyzed numerically by simulating plastically deforming double cantilever beam specimens using the finite element model. The developed RVE is implemented in the models to simulate the behavior of the adhesive layer. By this methodology, virtual experiments can be analyzed with extreme detail. It is shown that in-plane straining of the adhesive layer significantly influences the strength of adhesive joints at large plastic strain of the adherends. There is a never ending need in industries to minimize computational time. To this end, an interphase finite element for structural analyses is developed. The element considers in-plane straining of the adhesive layer due to large curvatures of surrounding substrates.

  • 952. Salomonsson, Kent
    Mixed mode modeling of a thin adhesive layer using a meso-mechanical model2008In: Mechanics of materials (Print), ISSN 0167-6636, E-ISSN 1872-7743, Vol. 40, no 8, p. 665-672Article in journal (Refereed)
    Abstract [en]

    A representative volume element is modeled using the finite element method. It is used to analyze mixed mode behavior of a thin adhesive layer. Two sources of dissipation is modeled; plasticity and decohesion. Macroscopic traction–separation laws are extracted from the simulations. The results indicate that a boundary of mode mix exists between a region where major plastic dissipation is present and a region where it is not. Without major plastic dissipation, the fracture energy is low and essentially governed by the cohesive properties. This is the case in peel dominated loading cases. In shear dominated loading cases plastic dissipation gives a substantial contribution to the fracture energy. The results show that pure shear loading gives the largest fracture energy.

  • 953. Salomonsson, Kent
    et al.
    Andersson, Tobias
    Högskolan i Skövde.
    Modeling and parameter calibration of an adhesive layer at the meso level2008In: Mechanics of materials (Print), ISSN 0167-6636, E-ISSN 1872-7743, Vol. 40, no 1, p. 48-65Article in journal (Refereed)
    Abstract [en]

    A mesomechanical finite element model of a thin adhesive layer is developed. The model is calibrated to previously performed experiments. In these, the adhesive layer is loaded in monotonically increasing peel or shear. An in situ SEM study is also performed and used to guide the modeling and calibration. The purpose of the mesomechanical finite element model is to facilitate the development of constitutive laws for adhesive layers. The modeling is based on Xu and Needleman’s method where all continuum finite elements are surrounded by interface elements that allow for the development of micro cracks. Thus, this enables the modeling of the entire process of degradation and fracture of the adhesive layer. A genetic algorithm is developed for the calibration. The simulations show good agreement with the experiments.

  • 954. Salomonsson, Kent
    et al.
    Andersson, Tobias
    Simulation of crack initiation and propagation in an adhesive layer using a meso-mechanical model2006In: Proc. of 27th Risø International Symposium on Materials Science, Polymer Composite Materials for Wind Power Turbines, 2006Conference paper (Other academic)
    Abstract [en]

    A finite element model of a double cantilever beam specimen is developed. The adherends are modeled using plane strain elastic continuum elements. Furthermore, the adhesive is modeled using a mesomechanical modeling technique which allows for simulation of initiation and propagation of micro-cracks. This enables the modeling of the entire process of degradation and fracture of the adhesive layer. The purpose of the present study is to compare the stress-deformation behavior in an idealized peel loading to the behavior in a double cantilever beam (DCB) specimen where the adhesive layer is deformed wilt a slight gradient along the layer. Previously performed experiments and simulations of the RVE are used as a comparison to the simulated results.

  • 955. Salomonsson, Kent
    et al.
    Andersson, Tobias
    Weighted Potential Methodology for Mixed Mode Cohesive Laws2010In: Proceedings of the MECOM DEL BICENTENARIO, IX Argentinian Congress on Computational Mechanics / [ed] Asociación Argentina de Mecánica Comptacional, 2010Conference paper (Refereed)
    Abstract [en]

    A  weighted  potential  methodology  is  developed  by  utilizing  pure  mode  I  and mode  II  energy  release  rate  experiments  to  determine  the  traction-separation  relations  for thin  adhesive  layers.  The  experimentally  measured  energy  release  rates  act  as  boundary conditions  for  developing  a  weighted  potential  function.  Thus,  the  tractions  for  any  mixed mode loading can be established.  Changes of mode mix during an experiment can also be captured  by  the  law  since  every  mixed  mode  variation  is  given  by  the  potential  function. Furthermore,  by  use  of  an  inverse  J-integral  approach  and  damage  type  variables,  the traction-separation  relations  for  any  mode  mix  can  be  approximated  by  use  of  pure  mode experiments.  Numerical  simulations  show  the  applicability  of  the  methodology.  The  results indicate  that  the  methodology  is  promising  when  simulating  the  constitutive  behavior  of adhesive layers.

  • 956. Salomonsson, Kent
    et al.
    Stigh, Ulf
    An adhesive interphase element for structural analyses2008In: International Journal for Numerical Methods in Engineering, ISSN 0029-5981, E-ISSN 1097-0207, Vol. 76, no 4, p. 482-500Article in journal (Refereed)
    Abstract [en]

    A special purpose finite element is developed for structural simulations of complex adhesively bonded structures. In the interphase element, the adhesive is explicitly regarded as a material phase between two substrates. The element considers large rotations. Furthermore, it considers in-plane straining of the adhesive due to large curvatures of the bonded shells. This feature appears especially important when considering bonding of thin plastically deforming metallic shell structures. Simulations are made on specimens where the adherends deform both elastically and plastically. The results are in good agreement with previously performed experiments. 

  • 957. Salomonsson, Kent
    et al.
    Stigh, Ulf
    Influence of root curvature on the fracture energy of adhesive layers2009In: Engineering Fracture Mechanics, ISSN 0013-7944, E-ISSN 1873-7315, Vol. 76, no 13, p. 2025-2038Article in journal (Refereed)
    Abstract [en]

    Previously performed experiments to study the mode I behavior of an adhesive layer revealed an apparent increase in the fracture toughness when the adherends deformed plastically. Attempts to simulate the experiments are made; both with elastically and plastically deforming adherends. Thus, effects of the size of the process zone and the deformation of the adherends are revealed. The adhesive layer is modeled using finite elements with different approaches; cohesive elements and representative volume elements. The adherends are modeled with solid elements. With a long process zone, all models give good results as compared to the experiments. However, only the model with representative volume elements gives good agreement for large root curvatures and correspondingly short process zones. The results are interpreted by analyzing the deformation and mechanisms of crack propagation in the representative volume elements. It is shown that with large root curvature of the adherends, the in-plane stretching of the adhesive layer gives a substantial contribution to the fracture energy. A simple formula is derived and shown to give an accurate prediction of the effects of the root curvature. This result indicates the limits of conventional cohesive zone modeling of an adhesive layer of finite thickness.

  • 958. Salomonsson, Kent
    et al.
    Stigh, Ulf
    On the apparent influence of the adherends on the fracture toughness of adhesive layers2007In: Proceedings of the 28th Risø international symposium on materials science, 2007Conference paper (Other academic)
    Abstract [en]

    A detailed model of experiments with the double cantilever beam specimen is set up. Analysis of the model shows that an experimentally deduced apparent increase of fracture energy with severely deforming adherends is due to contributions of in-plane straining of the adhesive layer to the fracture energy. An analysis with the J-integral confirms the result.

  • 959.
    Salomonsson, Kent
    et al.
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization. Jönköping University, School of Engineering, JTH, Product Development.
    Zhao, Xuefang
    Jönköping University, School of Engineering, JTH, Product Development.
    Kallin, Sara
    Jönköping University, School of Health and Welfare, HHJ, Dep. of Rehabilitation. Jönköping University, School of Engineering, JTH, Product Development.
    Analysis of the Internal Mechanical Conditions in the Lower Limb Due to External Loads2016In: World Academy of Science, Engineering and Technology, International Science Index, International Journal of Medical, Health, Biomedical, Bioengineering and Pharmaceutical Engineering, London, 2016, p. 288-293Conference paper (Refereed)
    Abstract [en]

    Human soft tissue is loaded and deformed by any activity, an effect known as a stress-strain relationship, and is often described by a load and tissue elongation curve. Several advances have been made in the fields of biology and mechanics of soft human tissue. However, there is limited information available on in vivo tissue mechanical characteristics and behavior. Confident mechanical properties of human soft tissue cannot be extrapolated from e.g. animal testing. Thus, there is need for non invasive methods to analyze mechanical characteristics of soft human tissue. In the present study, the internal mechanical conditions of the lower limb, which is subject to an external load, is studied by use of the finite element method. A detailed finite element model of the lower limb is made possible by use of MRI scans. Skin, fat, bones, fascia and muscles are represented separately and the material properties for them are obtained from literature. Previous studies have been shown to address macroscopic deformation features, e.g. indentation depth, to a large extent. However, the detail in which the internal anatomical features have been modeled does not reveal the critical internal strains that may induce hypoxia and/or eventual tissue damage. The results of the present study reveals that lumped material models, i.e. averaging of the material properties for the different constituents, does not capture regions of critical strains in contrast to more detailed models.

  • 960.
    Samuel, Widarsson
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Maskinverktyg till kronhjul och pinjong: Produktutveckling vid GKN Driveline Köping AB2016Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesis
    Abstract [en]

    This thesis has been carried out in cooperation with the firm GKN Driveline Köping AB subsection 6610 preparation and processing technology. The company manufactures the rear drive units and power transfer units for vehicles with four-wheel drive [Annex 1]. In the automotive industry there is major requirement for silent cars and there is constantly developing of new manufacturing methods for reducing noise from trafficked roads. The introduction of lapping gear kits for rear drive units and power transfer units resulted to the need of custom machine tools for GKN Driveline in the manufacturing process.

    The objective of this thesis was to improve the quality and reduce manufacturing time for the gear kits through the introduction of new machine tools. The requirement specification was set for a process capability with a Cpk greater than 1.33.

    The work begins with a theoretical framework of the manufacturing process that includes the processes affected by the machine tools. For tools to hard turning crown wheel [Annex 2] concept evaluation has been carried out and the determination of tolerances. The initiation of hard turning with crown wheel negatives instead of ball fixtures reduces production time generating profits. To find out the design of round grounding tool to the pinion [Annex 3], the number of guide pins has been investigated and also the tool impact on the tolerance of the spline.

    The process capability index has been examined, a sustainability-FMEA has been developed and an examination of the implications of the work has been carried out.

    Conclusions in the form of tools proposals are submitted and recommendations are followed up by proposals for further work.

    The work has been performed at the Department of Product Development, School of Engineering.

  • 961.
    Sand, Catrine
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Barkne, Therese
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Prognosobjekt och grupperingsnivå på Kinnarps AB: -För resursplanering på strategisk och taktisk nivå2006Independent thesis Advanced level (degree of Magister), 20 points / 30 hpStudent thesis
    Abstract [sv]

    Kinnarps AB är ett av de största ledande möbeltillverkande företagen i Europa, för kontorsmöbler. Kinnarps AB har många produktvarianter och erbjuder hela inredningslösningar och leveranser över hela världen. De normala leveranstiderna är två till fyra veckor men för närvarande har Kinnarps AB:s leveranstider förlängts då efterfrågan gått upp kraftigt.

    Produktionen präglas av kortsiktig planering med akuta lösningar, vilket innebär att den långsiktiga resursplaneringen till stor del uteblir. Produktions- och inköpsavdelningen har uppgett att den efterfrågeinformation som finns tillgänglig är svår att tillämpa vid strategisk och taktisk planering för material- och kapacitetsresurser. Med hjälp av mer utvecklade prognoser är förhoppningen att bättre kunna hantera efterfrågevariationer så som säsongsvariationer, produktmixförskjutning och trender.

    För att söka förbättringsområden för prognostiseringsarbetet genomfördes detta projekt som en fallstudie på Kinnarps AB. Utgångspunkten var att utifrån produktions- och inköpsavdelningen identifiera vilken prognosinformation som är behövlig för att kunna allokera produktions- och materialresurser på ett effektivt sätt.

    Målet var främst att bestämma lämpligt prognosobjekt och lämplig grupperingsnivå vid prognostisering. Genom att utforma de långsiktiga prognoserna så att de effektivt kan tillämpas vid resursplanering, skapas möjligheten att simulera de produktionslogistiska konsekvenserna vid en förändring i efterfrågan. Genom att använda goda prognoser som beslutsunderlag vid strategisk och taktisk planering sätts ramarna för den operativa planeringen. Vilket leder till att Kinnarps AB bättre kan möta kundernas efterfrågan. Det som krävs är att prognoserna innehåller lämplig information och avser passande detaljeringsnivå, samt att företagets olika funktioner samverkar för att bestämma hur prognosen bör utformas för att gynna helheten.

    Kinnarps AB rekommenderas att utforma sina prognoser så att de uttrycker vilken typ av produkter som ska produceras för att få mer specifik information om var i produktionsprocessen resurser behövs. Kinnarps AB:s produkter delas in i åtta övergripande produktgrupper och för dessa rekommenderas att en prognos i kronor genereras. Vidare bör en mer detaljerad prognos i styck tas fram som beskriver hur efterfrågan ser ut för vissa produktmodeller eller grupperingar av produktmodeller.

  • 962.
    Sandberg, Michael
    Jönköping University, School of Engineering.
    Konceptframtagning av en konferensstol2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 963.
    Sandgren, Andreas
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. JTH. Research area Industrial Production.
    Winroth, Mats
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. JTH. Research area Industrial Production.
    Collaborative manufacturing networks: A study of success factors2005In: Proceedings of the 16th Annual POM Conference, 2005Conference paper (Other scientific)
    Abstract [en]

    How can small and medium sized enterprises (SMEs) stay competitive in the future when the challenge from low-cost countries is getting more and more severe? One possibility is to enter collaborative settings with other companies and in that way increase the supplier capabilities. But, in that case, which factors are most important when creating efficient supply networks? Technical foresights and roadmaps exemplify several issues that are important to develop to be successful in the future, such as to have an environmental consciousness for product and production. It is also important to create collaboration between suppliers as a mean to become more interesting as partners for systems integrators. This is a process for small and medium sized enterprises in their efforts to meet the increasing global competition. Collaborations between independent enterprises are however not easily created. Several factors will affect suppliers’ ability to create these collaborative networks and make them strong enough to enable competitive strength towards threats from actors on the global market. This article describes the most important success factors for these collaborative networks.

  • 964.
    Sandstedt, Mattias
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Intern materialhanteringsutveckling på Kongsberg Automotive AB2008Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    This examination report is a part of a program for Industrial organisation and Economics with specialization in Logistics and Management at Jönköping University. The report contains an analysis of the internal material handling at Kongsberg Automotive, and also an improvement proposal for a new material handling system.

    The aim with the report is to find a better material handling system and also make an analyse of the existing system. The goal is to shorten the distance for the operators when they order material, and also to increase the productivity.

    The investigation methods for the report have for the most part consisted of observations and interviews of key-persons who daily work in the production. During some time the actual material handling-system has been observed and some shortcomings have been discovered, and these are also discussed in the report.

    The shortcomings that have been discovered are for once the indistinct signal that should signal need of material in the production. Some other activities have also been discovered that does not bring any value into the final products. The improvement proposal in the report is basically a routine that is built on kanban-cards and visual signals.

    Kongsberg should look over the existing material handling system and implement a system that on a better way signal need of material and also adapt the material in pallets to follow the demands for the products.

    In the end the discussion is about how the company should implement the new system in a successful way and what to observe in the different steps. Kongsberg is also recommended to use some sort of tool to follow up the situations when production don’t get the material in time.

  • 965.
    Sandström, Robin
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Maestre Diaz, Andres
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Hantering av restprodukter2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 966.
    Sanner, Joakim
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Färgesten, Jennifer
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Framtagning av nyckeltal som indikerar kvalitetsbristkostnader: Development of key performance indicators revealing the cost of poor quality2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Since the 1980s, companies have taken a larger interest in quality and it´s economic impact within the company. Having the knowledge that it´s not quality that costs money, but it´s rather the lack of quality. The work immerses itself in the field of cost of poor quality and the development of key performance indicators.

    The thesis is performed at Bufab Holding in Värnamo. Bufab Holding is a trading company which mainly buys and sells C-parts. C-parts include fasteners, other small metal-, rubber- or plastic parts such as wires, springs and electronic fasteners.

    The aim of this thesis was to make a survey of the cost of poor quality and to find key performance indicators (KPI) for cost of poor quality that can be continuously monitored. This work can serve as a basis for other companies within the Bufab group if the company believes that the content of the report can be used. With this aim two issues was created. What is the cost of poor quality that are linked to Bufabs complaints today, and where do they occur? Which key performance indicators can be created, which continuously can be monitored?

    The work began with a literature study to gain a deeper understanding of the cost of poor quality and the creation of KPI´s. The literature led the writers of this thesis into the methods that were used. Through the data collection, document gathering and given interviews an understanding of the company´s current economic situation. On this basis the company´s claims and processes where analysed with the help of "Seven quality tools". With the help of the piece cost model cost barriers was prepared and the cost of poor quality was calculated. Furthermore KPI´s was created through Lars Sörqvists description of ratio.

    The cost carriers differed depending on whether it was Bufab who caused the error, if it was a wrong product quality claim or if it was the supplier who caused the error. The cost of poor quality totaled of 4,7 Mkr. The pareto chart shows that the cause wrong product quality caused the highest costs. The costs of poor quality that where calculated mostly consisted of different labor costs. One of the KPI´s was based on labor cost and the other was based on total costs. Furthermore KPI´s where made of the number of complaints with the base of total number of order lines that have been sent.

    The company can then use this result to show how good quality the company have when new contracts are negotiated. If the methodology and results are promising, this thesis can be a working model for more companies within the Bufab group.

    Not all visible costs of poor quality was calculated in this thesis due a lack of time. The thesis also lacks entirely an assessment of the hidden costs of poor quality.

  • 967.
    Sanner, Johanna
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Barkman, Linnéa
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Distribution från butik till slutkonsument2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this thesis is to, in the long-term, reduce a company's costs regarding transportation from store to the final consumers. To achieve this, the following questions are answered in this thesis:

     

    • What does the company’s transport solution cost them today?

     

    • What is the cost to hire an external carrier to handle all transports to the final consumer and what will change compared to the current situation?

     

    • What is the cost if the external carrier also provides consolidation points, a terminal for gathering goods, in those cities where the company has more than one store and what will change compared to the current situation?

     

    This thesis contains support for decisions consisting of two parts. The first part contains a description of the current situation and the costs concerning the existing transport solution. The second part contains an estimate of cost from the external carrier containing two different quotations. The first quotation shows what it would cost the company if the carrier would handle the company’s shipments to the final consumer. The second quotation is an extension of the first quotation with additional costs related to consolidation points provided by the carrier.

     

    The description of the current situation was developed by questionnaires sent out to the company’s stores in the areas of Gothenburg and Stockholm. The quotations were presented by the external carrier by using data from the description of the current situation.

     

    Also there is an alternative solution presented. One conclusion is that, due to insufficient information from the stores, the quotations and the description of the current situation in this report aren’t one hundred percent reliable. Because of this it was further concluded that using a third-party logistics provider can give the company control over the costs.

  • 968.
    Saraji, Saman
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Izadpanahshahri, Seyedreza
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    The Role of Product Architecture in The Agile Manufacturing Firms2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Purpose – Agile manufacturing concept was first coined by Iacocca institute in 1991 as a new manufacturing paradigm in order to provide and ensure competitiveness in the emerging global manufacturing order. Afterward, a considerable number of studies have been conducted in this area. Reviewing these studies reveals that they mostly focus on agile manufacturing drivers, definition and characteristics but few of them propose practical solutions to achieve it. Moreover, among proposed approaches toward agility, the impact of product design has been less studied. However, the substantial impacts of product design on manufacturing firms are widely accepted. To fill this gap, this research aims to analyse how the product design affects the potential of being agile in a manufacturing firm. In this research the main focus is on the architecture of product as a part of its design.

    Methodology – Since this research requires synthesizing and bridging two separate fields, agile manufacturing and product architecture, the “literature review” method is adopted.

    Findings – Agile manufacturing has four main dimensions: drivers, capabilities, strategies and providers. To become an agile competitor, a manufacturing firm should concentrate on enriching a set of appropriate agility capabilities. Moreover, product architecture allocates functions to physical chunks (major building blocks of a product) and determines interfaces among chunks. The analysis of reviewed literature exhibits that product architecture has strong implications for agility capabilities. These implications might have both positive or negative effects which result in various trade-offs. Additionally, these trade-offs disclose this fact that there is not a superior architecture. Thus, a manufacturing firm is able to adopt suitable product architecture by considering the product architecture impacts on agility capabilities and related trade-offs.

    Value – This study organized and summarized a considerable number of researches’ outcomes in the product architecture area. In addition, it covers the lack of attention to product architecture in agile manufacturing literature. Also, it exhibits how product architecture may contribute to manufacturers which are moving toward agility. This report raises managers and practitioners’ awareness regarding product architecture potential and probable consequences of different choices that they make.

  • 969.
    Schedin, Joel
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Rösiö, Carin
    Jönköping University, School of Engineering, JTH. Research area Industrial Production. Mälardalens högskola, Akademin för innovation, design och teknik.
    Bellgran, Monica
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Considering Production Localisation in the Production System Design process2012Conference paper (Refereed)
  • 970.
    Schedin, Joel
    et al.
    Mälardalens högskola, Innovation och produktrealisering.
    Svensson Harari, Natalia
    Mälardalens högskola, Innovation och produktrealisering.
    Jackson, Mats
    Mälardalens högskola, Innovation och produktrealisering.
    Deleryd, Mats
    Mälardalens högskola, Innovation och produktrealisering.
    Management of newness in an assembly system2016In: Journal of Machine Engineering, ISSN 1895-7595, Vol. 16, no 1, p. 92-108Article in journal (Refereed)
    Abstract [en]

    The need for new products to suit differentiated customer needs and shorter product life-cycles, forces manufacturers to change or modify products and production systems at more frequent intervals. The objective of this paper is to discuss management of newness within assembly system design in the vehicle industry. Based on a case study covering four assembly development projects, a model using the quality concept of “7M” is presented to evaluate the level of newness. The results show that the model provides a promising platform for evaluation of newness. 

  • 971.
    Schneider, Christian
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Andersson, Oscar
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Examining Levels of Automation in the Wood Processing Industry - A case study2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Companies operating in the wood processing industry need to increase their productivity by implementing automation technologies in their production systems. An increasing global competition and rising raw material prizes challenge their competitiveness. Yet, too extensive automation brings risks such as a deterioration in situation awareness and operator deskilling. The concept of Levels of Automation is generally seen as means to achieve a balanced task allocation between the operators’ skills and competences and the need for automation technology relieving the humans from repetitive or hazardous work activities.

    The aim of this thesis was to examine to what extent existing methods for assessing Levels of Automation in production processes are applicable in the wood processing industry when focusing on an improved competitiveness of production systems. This was done by answering the following research questions (RQ):

    RQ1: What method is most appropriate to be applied with measuring Levels of Automation in the wood processing industry?

    RQ2: How can the measurement of Levels of Automation contribute to an improved competitiveness of the wood processing industry’s production processes?

    Literature reviews were used to identify the main characteristics of the wood processing industry affecting its automation potential and appropriate assessment methods for Levels of Automation in order to answer RQ1. When selecting the most suitable method, factors like the relevance to the target industry, application complexity or operational level the method is penetrating were important. The DYNAMO++ method, which covers both a rather quantitative technical-physical and a more qualitative social-cognitive dimension, was seen as most appropriate when taking into account these factors. To answer RQ 2, a case study was undertaken at a major Swedish manufacturer of interior wood products to point out paths how the measurement of Levels of Automation contributes to an improved competitiveness of the wood processing industry. The focus was on the task level on shop floor and concrete improvement suggestions were elaborated after applying the measurement method for Levels of Automation.

    Main aspects considered for generalization were enhancements regarding ergonomics in process design and cognitive support tools for shop-floor personnel through task standardization. Furthermore, difficulties regarding the automation of grading and sorting processes due to the heterogeneous material properties of wood argue for a suitable arrangement of human intervention options in terms of work task allocation.  The application of a modified version of DYNAMO++ reveals its pros and cons during a case study which covers a high operator involvement in the improvement process and the distinct predisposition of DYNAMO++ to be applied in an assembly system.

  • 972.
    Sedig, Ludwig
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Sundman, Niclas
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Reducering av transportsträckor i lagerverksamhet med hjälp av ABC-klassificerad artikelplacering2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose – The purpose of this study is to investigate how ABC-classified article placement can reduce transport distances within warehouse operations, which do not use volume-based article placement. Based on the purpose, two research questions have been formulated:

    [1]   How can an ABC-classified article placement be established in order to minimize transport distances within warehouses?

    [2]   How much can transport distances be reduced by using an ABC-classified article placement instead of a non-volume based storage?

    Method – The methods that have been used to collect data have been a case study and a literature review. The case study has been performed on Sherwin-Williams’ distribution centre in Nässjö and has mainly been based on two months of picking data. Interviews and observations have supplemented the document study. The literature review has resulted in a theoretical framework in which the relevant theories of the study have been presented. The collected data was analysed by comparing the different results against each other. Further comparisons analysed the empirical data against the theoretical framework.

    Findings – The study has resulted in a model of how ABC-classified article placement with the purpose to reduce transport distances can be designed. The model is based on a few steps that are: pilot study, performance of an ABC-analysis based on the articles picking rate, and zone division. According to the case study ABC-classified article placement can reduce up to 35 % of internal transportation distances and according to the theoretical framework of up to 55 %.

    Implications – Warehouses that want to use the study can proceed from the steps presented in the analysis section. Furthermore, the practical implications of the study results in a system configuration and the movement of goods to the introduction of the ABC-classified article placement. The study implies theoretically that the volume-based article placement minimizes transport distances. The existing theories stating this is evidenced in this study which also shows that warehouses with less skewed ABC-curves can benefit from placing high frequency goods near the loading area. The study contributes with a new model that has been developed by compiling theories in the studied area.

    Limitations – The study has been limited to a single case study. The calculations made in the study have excluded items that require special storage, small package picking and distance between the pallets that are retrieved together. Transport distances have been calculated from the loading area and has excluded the distance between the racks and unload area. 

  • 973.
    Sege, Victoria
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design, JTH, Produktionsutveckling.
    Balta, Pelda
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design, JTH, Produktionsutveckling.
    Benefits & barriers of implementing reconfigurable jigs: A study in offsite manufacturing of unique house elements in Sweden2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The aim of this paper is to identify the enablers, barriers and benefits of implementing reconfigurable jigs in the off-site manufacturing of unique house elements. Due to de- mands on customization, volume and lowering the cost, there is a need to increase flex- ibility in the industry. The paper focuses on mainly two phases of implementation, which are manufacturing, design and engineering.

    The research questions are answered by applying a single case study method, taking place in a Swedish house manufacturing company. The study consists of four different techniques – interviews, time study, observations, and questionnaire which are sup- ported with an additional literature review. Hence, research questions are answered from a triangulation approach providing nuanced and dynamic perspectives.

    From observations and time study it is concluded that in current situation, changeover in manufacturing is time-consuming due to the difference in complexity of product var- iants, along with a complex and inefficient setup process that is not responsive to a changeable environment. Findings imply that the barriers in both phases include lack of knowledge about reconfigurability, communication, current capabilities of CAD sys- tems as well as training and education. Enablers are found to be awareness of the needs of improvements, long-term mindset and working with product platforms. The benefits of implementing reconfigurable jigs include a reduction of setup time in manufacturing, better storage and sharing of information along with a better interpretation of that in- formation, a better structure in the organisation.

  • 974.
    servati, mohsen
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    game of change; a game theoretic approach to organizational change management2010Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

          Organizational change and game theory were separately investigated over time. Due to lack of scientific research on the relationships of those two fields of knowledge, an investigation of the game theoretic applications in managing change was performed in this research. Game theoretic applications were structured concerning the analytical use of game theory, strategic formulation with game theory and equilibrium analysis. By a qualitative flexible research method, main problematic areas of organizational change were identified with suitable game theoretic applications. Those problem areas are: making cooperation and coalition in change, group dynamic difficulties and the problem of incentive rewards. In each problem area, game theoretic solutions were discussed to help managers to make better decisions. Four mechanisms were inferred to support the game theoretic analysis of change management problems. Those mechanisms are: sub games, practical games, specific modeling and behavioral studies of games. Finally, an instructional framework was developed to conclude findings and illuminate the game theoretic approach in organizational change.

  • 975.
    Severinsson, Marcus
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Karlsson, Andreas
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Intern materialhantering på Fläkt Woods AB2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Internal material handling is an area within logistics that receive little attention. Logistics on the other hand has received increased attention in recent years due to the fast and global growth of markets. The aim for this report is to study the internal material handling at Fläkt Woods AB’s factory in Jönköping, Sweden. The study is limited to include activities from receiving goods until the start of final assembly. The purpose with this case study is to identify potential problem within the current setup of the internal material handling system and provide suggestions for improvements in order to minimize downtime in production caused by lack of material.

    Based on an abductive approach, the data collection performed via documents, observations and interviews lays the foundation for the compilation of a number of flowcharts. These flowcharts describe the flow for three separate product groups which the company previously has identified as most interesting to map. With the flowcharts as a starting point potential problems are identified and, with the use of an own-composed analytical framework, also classified in order to sort out problems that are likely to cause downtime in production. The study states that these problems originate from damaged/defective components, incorrect storing/picking or occur due to errors when recording and sorting newly arrived goods.

    Literature studies are the basis for a theoretical framework containing a number of principles that should be taken into consideration when handling material internally. This framework is the base on which the presented suggestions for improvements rely. The suggestions can be divided into three separate areas. Problems caused by human factors can be minimized by increased motivation, increased knowledge and a more comprehensive view within the workforce. All kinds of physical movement along with registration in the ERP-system should be conducted in a more standardized and secure way. A need of increased measuring and monitoring has also become evident in order to increase control over different types of undesirable events.

    Beside implementing the proposed suggestions for improvement the students also advice the company to study the theoretical framework in order to be able to apply it on other problems. This study identifies quite a few other problems, but due to the scope of the study they are not further analyzed.

  • 976.
    Shine, Francis
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Mohandas, Akhildas
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Product standardization to reduce lead time to meet customer demand in glulam manufacturing industry.2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Standardization is Organizing and showcasing a manufacturing firm’s product or potentially benefits abroad are confronted with the choice of whether to institutionalize or adjust their product variants which simply means “one size fits all” method (Lundeteg, 2012). As industrial revolution was in peak many manufacturing industries around the world moved from mass production to mass customization. As per then, customers need was to gain a desirable product even if the lead time was higher than of buying a common product which everyone has.Main aim of the study is to re implement mass production in a firm where mass customization was adopted decades ago. As there are two categories of customers supporting both customized production and mass production, they need to adopt an innovative way without losing both types of customers. This report consist of the ways standardized production was done in the case company without affecting both types of customers and by decreasing lead time which was their main problem. The report consist detailed description of methods adopted for analyzing and how standardized production is effectively incorporated with customized production. Report also consist of quantitative data and qualitative literature support for analyzing and creating simulation model.Case study was also aiming at production systems in the company to understand the productions in deeper manner and how the new system could be effectively implemented in current situation. New proposal for standardized production was done based on the detailed study of factory layout and the products were proposed after detailed analysis of the quantitative data. Study was mainly concentrated on quantitative sales data analysis as the production is done base on make to stock and the customization is just done in cutting section. Analysis and simulation model creation was done in excel as the internal documents were done in excel and complex operations also is possible in excel.

  • 977.
    Simic , Ivana
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Nikolaeva, Natasha
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Effektivisering av produkionsflödet för stora cylinderrör på Företaget AB2009Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

     

    This study was conducted in autumn 2008 on the Company AB, which is currently in a growth phase. The company manufactures hydraulic systems for the heavy vehicle industry and has annual sales of approximately 250 MSEK with 165 employees.

    The rapid growth and unchanged planning is the starting point for this report. It all began in 2005 when the company received an unusually large order. During this period, the first priority was to satisfy customers and all other focus was disregarded. This has primarily resulted in a messy production and long throughput times. The main reason for the long throughput times are the difficulties arising with the manufacture of cylinder tubes.

    The company has realized that streamlining of the production flow for cylinder tubes has to be done. Therefore, the aim of this study, based on a stationary machinery conditions is to suggest a more efficient production flow for large cylinder tubes and thereby achieve savings in time and cost.

    In order to illustrate and solve the problem a case study method has been used. The company's information system and interviews with responsible people at the Company AB has been a great help in collecting data. To get a detailed understanding of the situation in the production tools such as material flow analysis and process flow analysis was used.

    The result of the present situation shows that the company AB has problems with long throughput times for large cylinder tubes. The basic reason is the insufficient capacity available in the manual machines. The insufficient capacity leads to delays, creates a need for storage place and transportation between most of the operations as the manufacture of large cylinder tubes requires. Since the machines are scattered throughout the company and manufacturing is being cross-wised the large cylinder tubes are handled and transported back and forth, which creates disorder.

    After that the problems of the present situation had been found, began work on streamlining the production flow and resulted in a proposal on a production line was developed. In chapter analysis and discussion a comparison with focus on cost and time has been done between the current situation and the proposed production line where the result was decisive in the decision-making at a higher level. The analysis and discussion chapter also mentions possible consequences and improvements.

    One conclusion is that it is possible to achieve efficient production flow in terms of time and cost with the suggested production line, however, management's commitment and holistic approach is necessary to achieve a sustainable system.

     

  • 978.
    Singh, Shivansh
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design, JTH, Product design and development (PDD).
    Knowledge Base Engineering Design Methodology and Integration with PLM System Part Factory2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Companies are trying to decrease product expenses while customizing product according to customers requirements. So to satisfy the customers’ requirements, companies must adapt their business to mass customisation.  Mass customization final product goes through all flexible company production technology process, which can lead to being expensive and time-consuming and because of this, a product configuration system is developed to reduce product cost and reduce time. The primary focus of this thesis is to develop a KBE prototype using constraint-based techniques of product configurations. For developing KBE implementation of  UML/OCL, XML, Backtracking search is used. Then prototype expert configurator is developed using OCL constraints.

  • 979.
    Sivasubramanian, Sriramkumar
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design, JTH, Product design and development (PDD).
    Optimization and simulation of formed suction cup to position aerospace CFRP parts during milling.2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • 980.
    Sixtensson, Kjell
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Andersson, Magnus
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Utveckling av skrivbordsklaff: Produktutveckling2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Detta projekt startade med att SB Seating AB (SBS) behövde utveckla en ny skrivbordsklaff till nya stolen Ana. Produkten ska erbjuda ett mobilt anteckningsunderlag.Eftersom stolens underrede förändrades krävdes en ny lösning på infästning. Samtidigt önskade SBS en förnyad modernare utformning med samhörighet till stolen.

     

    Projektet inleddes med att utföra förstudie och kundundersökning, för att ta fram en kravspecifikation. Sedan fortsatte arbetet med konceptutveckling, val av material, tillverkningsmetoder, hållfasthetsberäkningar samt CAD-ritningar.

     

    Frågorna som detta projekt ska reda ut är:

     

    Är det möjligt att utveckla en mobil skrivbordsklaff till den nya stolen Ana?Genomförd produktutveckling och framtagna koncept visar att det är möjligt att utveckla en skrivbordsklaff till stolen Ana på minst två olika sätt. Resultatet påverkas av stolens användningsområde, egenskaper och utvecklingsprocess.

    Hur värderas konceptens semantiska funktioner ur ett designperspektiv?För att tolka hur utformningen kommunicerar med användaren användes Rune Monös förklaringsmodell, där koncept utvärderas efter dess förmåga att beskriva, uttrycka, uppmana och identifiera.Det finns detaljer i koncepten som kommunicerar med användaren genom formspråket. Funktioner som har utformats för att tydliggöra användningen. Konceptens identifiering med stolen kan ses genom materialval, ytbehandling och former.

     

    Resultatet av projektet är två koncept framtagna i CAD samt dess semantiska funktioner. Prototyper på koncepten kan nu tas fram för vidare belastningstester för optimering.

    Slutsatsen är att koncepten klarar av uppsatta krav och förmedlar funktionerna till användarna. Koncepten påverkats dock av den nya stolens egenskaper.

  • 981.
    Sjöberg, Sara
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Gottfridson, Josefin
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Ledtidsanalys på Peltor AB med logisk gruppindelning på elektronikprodukter2007Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    This report is the result of a case study at Peltor AB during the spring semester of 2007. The task Peltor gave us was to improve the delivery accuracy and to lower the high finical value of delayed orders (backorder), and to divide the products into logical groups. The logical group will be a useful tool to remain a high level of service. If the level of service increases the company will be more competitive.

    The electronic department at Peltor has problems with delayed orders. According to Peltor, the problem is based on delivery lead time which is presumed.

    To increase the delivery accuracy, a lead time analysis is made to find the accumulated delivery lead times for each product. This is a way for Peltor to give the customer a more correct delivery lead time when the order is placed.

    The analysis shows that many of the delivery lead times which the company use today, are often miscalculated. The difference can be either longer or shorter than the presumed lead time. One example of a longer lead time is when the accumulated lead time is 91 days and the presumed lead time is 30 days. The difference will be 61 days, and this is the major reason why Peltor thinks products end up in the “backorder”. Our result shows that there are more factors than the delivery lead time which affects whether an order will be delivered on time or not.

  • 982.
    Skoog, Axel
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    He, Yuan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Framtagning av nytt kopplingskoncept: För att klara höjda krav på en Husqvarnamotorsåg2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study is performed as a final thesis project at School of Engineering, Jönköping University in collaboration with the Global Components Group at Husqvarna AB. The purpose of the work was to find another way to attach the centrifugal clutch to the chainsaw model 560 XP.

    On Husqvarna's chainsaws, the cutting chain and oil pump are driven by a centrifugal clutch that currently is fastened with a screw joint on the crank shaft. To make sure the clutch won't come loose during operation, a tightening torque of 20–25 Nm is recommended. For the next product generation, the tightening torque has been raised to 30–40 Nm which will worsen the serviceability. Furthermore, the risk of breaking the clutch during disassembly will increase. This led to the need of a new way of fastening the clutch. The solution should withstand the increased loads as well as improve the serviceability through easier assembly and disassembly.

    Information about the problem were collected through a pilot study, including a review of the current product and interviews with involved personnel at Husqvarna. This was used to compile a list of necessary and desirable requirements for the solution. The most important requirements proved to be the ability to transfer torque, stop the joint from getting loose during operation, minimize the tightening torque as well as offering assembly and disassembly with the including tool upon purchase.

    Furthermore, a conceptual study was carried out to be able to find a solution to the problem. A brainstorming process generated just over 20 concepts and ideas that later were screened and evaluated with various well proven methods, such as Go/No-Go and Pugh's matrix. The concepts were evaluated against the requirements specified in the pilot study and one single concept was chosen for further development.

    The chosen concept was a spline joint that prevented axial movement with the help of an E-clip and a spring washer. The strength of this solution was mainly the elimination of the tightening torque, which led to easier assembly and disassembly. The E-clip was easily handled with the tool provided in the purchase. Calculations and a rough design were then performed. It turned out that it was hard to dimension the spline joint within the design limits stated to minimize the impact on the other components in the system. The shear stresses in the crankshaft and the spline teeth ended up high because of safety factors for fatigue life and type of application. High enough to exceed the maximum allowable shear stress of the shaft material several times. To lower these stresses, the design limitations will most likely have to be exceeded which leads to extensive design changes.

    However, Husqvarna are recommended to continue the study on this concept in more detail before it is to be precluded. Comparison with the current solution led to the conclusion that the differences in shear stresses between the both solutions shouldn't be as big as the theory claims. This opened a series of suggestions for future work. For instance, computer aided simulations of a detailed design of the concept would more accurately evaluate the strength of the concept. Furthermore, a risk assessment should be performed to address all the risks and consequences the concept brings with it.

  • 983.
    Smedberg, Karl
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Asamoah-Barnieh, Raymond
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    The Problem of Missing Items at the Time of Production: A Case Study at Fläkt Woods in Jönköping2009Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In today‟s manufacturing environment, different parts manufactured in-house and bought from suppliers are often assembled together into a finished product. Competition has made it very important for companies to deliver a customized product on a promised date. However, when inventory items are missing at the time of production, lead times for products become uncertain and this makes it difficult to fulfill a customer order on the promised date. It is thus important to explore the causes of missing items at the time of production in order to solve such a problem. This Master of Science thesis carried out through a case study at Fläkt Woods in collaboration with Jönköping University is about the problem of not finding specific inventory items in the locations specified by the computer system. It is delimited to inventory items which are physically within the company premises or which according to the computer system are within the premises of the company. The questions at issue have been what the causes of the problem of missing items within the company are and how to effectively reduce the problem. The thesis has been carried out over an entire academic semester as a full-time work in the company. The sources of the problem have been found to be the result of the work procedure, the underlying software used during work (the in-house developed ERP system), stealing from orders, ineffective barcode scans, re-sequencing at the component manufacturing department (called pre-manufacturing in the company) due to the need to fulfill multiple objectives, set-up times at the component manufacturing department and human errors among others. The suggestions given include: modification of the work procedure and the underlying software used at work, increasing effective scanning and using some checks at critical points in the material flow. Areas for further research are given to further reduce the impact of the problem on the production system.

  • 984.
    Smedberg, Karl
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Johansson, Daniel
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Bergström, Jacob
    JTH, Industrial Engineering and Management.
    Analys och implementering av ett lagerhanteringssystem: Thule Sweden AB2007Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    Three students with two different theoretical focuses have worked together to develop

    our examination thesis. This thesis is a requirement of the curriculum at the School of

    Engineering in Jönköping. The School of Engineering’s programs include Industrial

    engineering and management, with a focus on logistics and management and

    mechanical engineering.

    This exam thesis was implemented at Thule’s plant in Hillerstorp, Sweden. Thule is a

    world-leading company offering transport solutions in a safe, simple and elegant way

    for cars (Thule 2007).

    The project objective was to analyze and to implement a fully functional inventory

    system for one of Thule’s average stock items and to address meeting capacity

    requirements of

    2 268 stores. In this inventory, attention is paid to tracking product labels and their

    assembly instructions. These two article groups are important for Thule’s material

    management.

    The output of data related to these two article groups are included with each end

    product that is to be delivered from Thule’s factory in Hillerstorp.

    Thule was having problems managing stock/inventory. Employees found it difficult to

    locate articles that were required for production and manufacturing due to inadequate

    labeling of stock and inventory. This problem was caused by insufficiently labeled

    storage areas and inadequate information of what inventory was being stored.

    The group performed an analysis comprised of a comparison between four different

    inventory management systems: a system with permanent stores, one paternoster

    inventory management system, a management system for delivery direct to the

    production groups and a system with dynamic stores. A decision was made choosing a

    dynamic system; which was chosen because of Thule’s requirement to address

    seasonal variations. A dynamic management system has the advantage that the articles

    that belong to various summer and winter products can” borrow” stores of each other

    when one of them are not in production.

    After the analysis, a dynamic system was implemented. The system design decisions

    were made with input from employees that work with Thule’s inventory. This was

    important from the examination group’s point of view because the employees will

    work with whatever future inventory management system would be implemented. In

    addition, they contributed with knowledge that would be difficultly to see for as an

    outsider.

    After the implementation was made, various proposals have been presented in order to

    further develop Thule’s material management system. These proposals comprise

    measures to improve the dynamic supply system further, and in conjunction with

    Thule’s business model works to further develop supplier collaboration with the

    company’s production requirements.

  • 985.
    Smith, Alfred
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Oikarinen, Jari
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Design study of a new product2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This bachelor thesis in product development and design, done at Jönköping University in collaboration with Husqvarna AB, presents a design study for a new product. Jari Oikarinen and Alfred Smith performed the design study. 

    Initial research, including a project plan and a pilot study, provided the framework for the work ahead. The implementation contains a case study, concept study and an experiment involving the product. Different concepts were evaluated but one was chosen as most viable. 

    The design study finishes with the results, that some internal components needed to be changed or modified to operate the product, presentation of the final concept and the test of the product. 

    Lastly, further work is recommended based on this report.

  • 986.
    Soleimani, Hamed
    et al.
    Faculty of Industrial and Mechanical Engineering, Islamic Azad University, Qazvin Branch, Qazvin, Iran.
    Govindan, Kannan
    Center for Engineering Operations Management, Department of Technology and Innovation, University of Southern Denmark, Odense, Denmark.
    Saghafi, Hamid
    Faculty of Industrial and Mechanical Engineering, Islamic Azad University, Qazvin Branch, Qazvin, Iran.
    Jafari, Hamid
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Fuzzy Multi-Objective Sustainable and Green Closed-Loop Supply Chain Network Design2017In: Computers & industrial engineering, ISSN 0360-8352, E-ISSN 1879-0550, Vol. 109, p. 191-203Article in journal (Refereed)
    Abstract [en]

    This article addresses a design problem of a closed loop supply chain, including suppliers, manufacturers, distribution centers, customers, warehouse centers, return centers, and recycling centers. The problem entails three choices regarding recycling, namely, product recycling, and components recycling raw material recycling. Modeling this chain is carried out by accounting for environmental considerations, total profit optimization, and reduction of lost working days due to occupational accidents, we well as maximizing responsiveness to customer demand. In order to solve the model, genetic algorithm has been used and multiple scenarios with different aspects have been studied. Solving this model provides decisions regarding opening or closing of each of the components of the network and the optimal product flow among them. The results prove the feasibility of the presented model and the applicability of the developed solution methodology.

  • 987.
    Soler Salazar, Pedro
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Elvesten, Mathilda
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Produktutveckling av kylväska för transport av vacciner i svåråtkomliga platser2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis project was performed in collaboration with the consulting firm i3tex AB in Gothenburg and Aircontainer Package System Sweden AB (APS) in Stockholm. APS develops and sells standard and customized packaging solutions for transporting temperature sensitive products. One of APS’s wishes is in the near future to be able to offer more choices of coolers. One of these new possible alternatives is a cool box that could be used for the transport of vaccines in difficult environments, a product that currently is not in their range. This thesis focuses therefore on taking APS existing blood bag as a reference to create a new concept for the transport of vaccines and to also develop ergonomic features to facilitate and optimize the use of it by the people working in the field for organizations such as UNICEF or Doctors Without Borders.

    In order to get a better understanding of the user’s needs and requirements an evaluation of the vaccination program and its procedures was made. Qualitative interviews with field workers for MSF were also conducted; here the focus was on how the transport process operated. Along with an ergonomic study an interview was conducted with an ergonomic specialist to get a deeper understanding of the ergonomic features that the final concept ought to have.

    The path to creating the final concept has been based on a design process. In this process a specification of the product was made and developed upon to make various concepts that were taken into consideration. Finally a design prototype was developed based on the chosen final concept.

    The final concept fulfills the requirements previously set on the product and it is competitive based on its technology and design. The concept is more user-friendly and offers a better cooling technology than the vaccine carriers available in the market today.

  • 988.
    Soosay, Claudine
    et al.
    University of South Australia Business School, Adelaide, Australia.
    Nunes, Breno
    Aston Business School, Aston University, Birmingham, UK.
    Bennett, David J.
    Department of Technology Management and Economics, Chalmers University of Technology, Gothenburg, Sweden AND University of South Australia Business School, Adelaide, Australia.
    Sohal, Amrik
    Faculty of Business and Economics, Monash University, Melbourne, Australia.
    Jabar, Juhaini
    Faculty of Technology and Technopreneurship, Universiti Teknikal Malaysia Melaka, Melaka, Malaysia.
    Winroth, Mats
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Production. Department of Technology Management and Economics, Chalmers University of Technology, Gothenburg, Sweden.
    Strategies for sustaining manufacturing competitiveness: Comparative case studies in Australia and Sweden2016In: Journal of Manufacturing Technology Management, ISSN 1741-038X, E-ISSN 1758-7786, Vol. 27, no 1, p. 6-37Article in journal (Refereed)
    Abstract [en]

    Purpose – The purpose of this paper is to report an investigation of local sustainable production in Australia and Sweden aimed at exploring the factors contributing to survival and competitiveness of manufacturing companies.

    Design/methodology/approach – In Australia, six companies were studied in 2010, with comparisons being made with three of them from earlier projects. In Sweden, eight manufacturing companies were studied on two occasions 30 years apart, in 1980 and 2010. To provide a valid comparative perspective a common format for data collection and analysis was used.

    Findings – There has been a shift in the nature of competition in both Sweden and Australia due to an increasing complexity of the global business environment as well as changes in technology and customer expectations. Despite the differences in country context, the findings suggest that all the manufacturing companies have a good awareness of the elements of the market environment and the relationships with their competitive strategy. However, in general, the Swedish companies have more experience of managing the risks and benefits from operating in the international environment.

    Research limitations/implications – The results of the research are based on a relatively small sample of case companies in a limited number of industrial sectors. There are methodology implications for future research in the area.

    Practical implications – The research results have practical implications for the manufacturing industry, especially for companies operating in a competitive international environment.

    Originality/value – The paper is based on original case research and comparative analysis of data from different geographical contexts. It contributes to both theory and management practice about the strategic resources, decision choices, competitive environments and firm values needed to address external market demands as well as in building internal capabilities.

  • 989.
    Soosay, Claudine
    et al.
    University of South Australia, Adelaide, Australia.
    Nunes, Breno
    Aston University, Birmingham, UK.
    Bennett, David
    Chalmers University of Technology, Sweden.
    Sohal, Amrik
    Monash University, Melbourne, Australia.
    Jabar, Juhaini
    Universiti Teknikal Malaysia Melaka.
    Winroth, Mats
    Jönköping University, School of Engineering, JTH. Research area Industrial Production. Chalmers University of Technology, Sweden.
    Strategies for sustaining manufacturing competitiveness: Case studies of Australian firms2012In: Advances in manufacturing technology XXVI: tenth international conference on manufacturing research / [ed] Baines, T.S.; Clegg, B.T. and Harrison, D.K, Birmingham: Aston Business School, Aston University , 2012Conference paper (Refereed)
    Abstract [en]

    This study investigates the strategies adopted by Australian manufacturing firms to sustain their local production and competitiveness, including during the period of the recent global financial crisis. Six Australian manufacturing organisations in different sectors were selected and analysed using the market-based and resource-based views, and components of the DRAMA framework. The findings highlight several factors and company efforts to sustain manufacturing operations. These organisations pursued a range of manufacturing strategies to enable distinctive offerings in the marketplace and used various ways to differentiate themselves. This was possible through the portfolio of capabilities that determine their continued production and business performance over the period. This study provides important lessons for managers in manufacturing organisations and demonstrates how differing capabilities and strategies of firms can impact the competitiveness of local production, not only in times of economic crisis but also in the long run to sustainable competitiveness in the future.

  • 990.
    Spasova, Paraskeva
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Decision-making at operational level2007Student thesis
    Abstract [en]

    One of the universal characteristics of all organization concerns their attempts to achieve high product quality at low price. For that reason, the contemporary organizations direct their attempts to improve the utilization of workers’ potential and adopt the line-stopping strategies at the shop .The research presented in this thesis aims at analyzing and revealing to what extent the decisions at the shop floor depend on operators. The conclusions drawn in this paper contribute to determination of the scope of operators’ responsibilities and examination of the ways in which workers maintain the process uninterrupted. The role of operators for attaining the desired product quality is presented as well. These objectives have been accomplished through theoretical work.

  • 991.
    Stahl, Bojan
    et al.
    Politecnico di Milano.
    Taghavi, Naghmeh
    Chalmers University of Technology.
    Winroth, Mats
    Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    Kjellsdotter Ivert, Linea
    Chalmers University of Technology.
    Manufacturing strategy: The missing link between sustainability in corporate strategy and sustainable production2014Conference paper (Refereed)
    Abstract [en]

    This paper provides insights into integration of sustainability into manufacturing strategy definition and implementation process. While literature argues that manufacturing strategy can be defined via top-down or bottom-up processes, and implementation is conducted via manufacturing improvement programs, companies struggle to successfully implement sustainability as a part of manufacturing strategy. Based on explorative multi case study research, the study shows that (i) the competitive priority choices are not the distinguishing factor whether sustainability is included in the manufacturing strategy, (ii) there is a mismatch between what firms think about sustainability and what they actually do. 

  • 992.
    Standoft, Johannes
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Sondell, Glenn
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    El-konvertering av styrkolonn2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report presents the thesis 15hp (C-level) in the mechanical engineering program at Jönköping University. The work has been carried out together with Kongsberg Automotive AB in Ljungsarp. The aim of this work was to develop one of their product series of steering columns so that electric motors will replace the current manual controls for various adjustments such as height, tilt and angle of the steering wheel.

  • 993.
    Stefansson, Oliver
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Thylander, Christian
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Kartläggning av funktioner till ny planeringsmodul2008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report is a result of a project that been conducted on System Andersson. System Andersson sells and develops MPS-systems for small and medium sized manufacturing companies. System Andersson are today located in the central parts of Jönköping and has about 20 employees. The goal for the project is to develop a new version of Andersson Qwick mps. The project has been divided into a number of smaller projects were the authors been part of the planning module project. The purpose of this part of the project is to investigate which functions that is going to be included in the new MPS-system. The authors part of the projects started off from formulations of questions that been stated in the initial phase of the project.

     

    Two perspectives is brought forward in this report were the authors present what functions  that is available in system today and also which functions that System Anderssons future customers have the need for. The methods used are mapping, interviews and also literature studies that been of great use to answer the questions stated. A mapping of five MPS-systems, including System Andersson, Jeeves, Pyramid, EQ-Plan and Monitor has been conducted.

     

    The results from the review of the mapping shows that System Andersson has the least amount of functions, 21 out of 51. Jeeves offered the greatest amount of functions and thereafter Monitor, Pyramid and EQ-Plan. The area where System Andersson performed best was in the material planning section. Beyond this mapping a prioritisation of the functions has been made by employees of System Andersson. This prioritization showed that many of the 51 functions received a high priority and a small amount of functions received a low priority. If the mapping and the prioritisation is brought together the results show that there was a great amount of functions that received a  high priority that were not included in the system used and sold by System Andersson today. The second part of the results is a number of interviews were the purpose is to create a reference base were parallels can be drawn between the mapping and the prioritisation made by System Andersson. The study show where System Andersson today is positioned in the volym/variant matrix and were the competitors is situated. The results shows that System Andersson miss a number of functions compared to their target group to supply other manufacturing methods and demands of adjacent markets.

     

    The functions that are desirable to implement in the new system to gain more market shares in adjacent markets is:

     

    • A Graphical planning tool
    • A net requirement rapport
    • Daily planning tool
  • 994.
    Stendal, Marcus
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Modellering av variantrik produkt för att stödja programmering av produktkonfigurator - en utvärdering av Produktvariantmastermetoden2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In connection with implementation of a product or a product range in a product configuration system, a need may occur to sort out the relationships between variants in a product flora. To create an overview of the information concerning the product, there are alternative technologies to use. One of these technologies is the Product variant master, a layout technique that was originally developed at Technological University in Copenhagen (DTU). The method is similar to the more established class diagrams, however, the key difference is that the Product variant master is divided into three parts which reflect the different stakeholders interest area. Further, this method has previously been used in situation where the number of variants of the product range has been perspicuous.This study focus on a situation where the number of product variants are impossible to predict, which is the case for Fläkt Woods, a manufacturer of air handling units. The company is currently missing a product analysis technique that can support programming of a product configuration system. Hence, the aim of the study is to examine to what extent the Product variant master could be used as well as provide assistance when programming. Additionally, the aim is to study the role it plays in the programming procedure of a product configuration system. The research questions are designed to answer; the amount of effort that would be required to use the Product variant master, what the advantageous and disadvantageous are with using the model as well as the possibility of the Product variant master to function as a platform for programming a product configuration system.The research is based on a single case study with an explorative approach. The findings were gathered from empirical studies of implementing the eQ-series in a Product variant master. The model will form a platform for further programming into a product configuration system. These steps may reflect eventually obstacles during full-scale implementation. To manage the size of the information within a set time frame, just a part of the information was included in the study. The chosen part was acting representative for the entire product range. Thus, being able to obtain a holistic view of the total magnitude, conclusions and recommendations to the company could be drawn.The outcome of the study provides a functional structure of the Product variant master, which could handle the variant mass in the eQ-series. The use of the model provides a shared knowledge about the product or product flora, which the stakeholders can agree upon. At the same time create transparency on the properties a specific component can contribute with, but also what value for the user. A list of key concepts used in this study is available to the reader under section 9.

  • 995.
    Stenebrand, Louise
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Björling, Elsa
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Förstyvning av batteridriven trimmer2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose – The purpose of this thesis is to minimize or completely eliminate the flexure in Husqvarna’s brush cutter 536 LiR from the handle down to the engine and the blade when a weight of 5 kilogrammes is hanged from the handle.

    Method – A concept study has been made on Husqvarna’s brush cutter 536 LiR to examine and evaluate what the problem with the model is and from that to develop different concepts to minimize the flexure. The work has followed a Stage-Gate product development process with seven steps from defining the specification of requirements to developing and testing prototypes. Ideas of concepts were generated using the methods brainstorming and Reverse Engineering and were later sifted using Pugh’s matrix. Finite Element Analysis was used to evaluate the product and to analyse certain concepts. Advanced prototypes were created using selective laser-sintering whilst simpler models were created by hand. The prototypes were tested and compared to the original product.

    Findings – This project presents five different suggestions on how to minimize the flexure in the brush cutter; one stiffer version of the original plastic casings, three accessories to attach to the original product and a proposal for a change of material. All these suggestions gave positive results with a lesser flexure, but the third accessory, Tillbehör 3, was the one that showed the smallest flexure and the only one able to fulfil the purpose of the study. The weight of the accessory was, however, too big. The stiffer version of the original casings and the change of material also showed good results regarding flexure and did not increase the weight too much.

    Implications – If any of the proposals of this project were to be implemented in production, it would cause certain temporary consequences for the production of the brush cutter. The tools for the plastic components of the current brush cutter would need some changing in order to manufacture the stiffer version of the mouldings or to produce the different material, whilst for the first two accessories completely new tools for injection moulding would have to be developed. To implement the third accessory, new calculations would be needed since the eigenfrequency of the brush cutter would be changed. It would, however, be cheaper to produce this accessory compared to the first two, since the third one does not need to be manufactured using injection moulding.

    Limitations – Most of the prototypes in this work is manufactured using selective laser sintering and not injection moulding, which is the manufacturing method of the current plastic casings. This means that the properties of the materials will be different than they would be if they were manufactured for production. Furthermore the materials used in the casings of the brush cutter are filled to certain degree with glass fibres, meaning that the material properties will be even more different depending on manufacturing method. The position and direction of the glass fibres will be different depending on which process is used, giving different mechanical properties.

  • 996.
    Stenow, Filip
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Arias Murillo, Omar Fabian
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Infästning mellan damasken och växelspaken2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Framtagning av en ny infästningen mellan damasken och växelspaken till företaget Kongsberg Automotive AB.

  • 997.
    Stigh, Ulf
    et al.
    Högskolan i Skövde.
    Alfredsson, Svante
    Högskolan i Skövde.
    Andersson, Tobias
    Högskolan i Skövde.
    Biel, Anders
    Högskolan i Skövde.
    Carlberger, Thomas
    Högskolan i Skövde.
    Salomonsson, Kent
    Högskolan i Skövde.
    Some aspects of cohesive models and modelling with special application to strength of adhesive layers2010In: International Journal of Fracture, ISSN 0376-9429, E-ISSN 1573-2673, Vol. 165, no 2, p. 149-162Article in journal (Refereed)
    Abstract [en]

    An overview of recent development of cohesive modelling is given. Cohesive models are discussed in general and specifically for the modelling of adhesive layers. It is argued that most cohesive models model a material volume and not a surface. Detailed microscopic and mesomechanical studies of the fracture process of an engineering epoxy are discussed. These studies show how plasticity on the mesomechanical length scale contributes to the fracture energy in shear dominated load cases. Methods to measure cohesive laws are presented in a general setting. Conclusions and conjectures based on experimental and mesomechanical studies are presented. The influence of temperature and strain rate on the peak stress and fracture energy of cohesive laws indicates fundamentally different mechanisms responsible for these properties. Experiments and mesomechanical studies show that in-plane straining of an adhesive layer can give large contributions to the registered fracture energy. Finite element formulations including a method to incorporate this influence are discussed.

  • 998.
    Stillström, Carin
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    The Concept of Mobile Manufacturing2007Licentiate thesis, monograph (Other academic)
    Abstract [en]

    There is a need for a manufacturing concept that is characterized by ease in changing between manufacturing places, ease in producing wherever it is convenient for the moment, ease in collaborating with different partners, and reconfigurability and reuse of manufacturing capacity, while at the same time keeping control of the own capabilities.

    The objective of this thesis is to investigate and describe the concept of mobile manufacturing in order to find new ways of competing for the manufacturing industry. The concept of mobile manufacturing is characterized by changeability, where mobility is defined as the ability to change between geographical places with little penalty in time, effort, cost, or performance. A mobile manufacturing system is thus a system that efficiently changes between different departments or sites and is easily reconfigured to fit different orders and locations.

    This thesis consists of a comparison of five cases where mobile manufacturing systems were developed and realized. The mobility characteristic in those manufacturing systems has been analysed. Factors affecting mobility and how the mobile manufacturing system is designed have been described, such as the organizational and geographical distance that the mobile manufacturing module is transported, and different types of management and ownership structure. A great range of mobility has thereby been identified and it has been shown that there are different dimensions of mobile manufacturing.

    By viewing the mobile manufacturing system in a life-cycle perspective, the focus has been on the iterative reuse of the manufacturing system. Mobile manufacturing equipment could be used, for example, in order to perform low-frequency operations or to cope with occasional volume peaks. There are a number of advantages of mobile manufacturing that make it a potential future manufacturing concept: instead of investing in new equipment, mobile manufacturing modules could be used and shared by several actors; efficiency is maximized; mobile manufacturing gives opportunities for joint investments; and it also enables moving closer to the customer or reaching new markets.

  • 999.
    Stillström, Carin
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Bäckstrand, Jenny
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Effects on Supply Chain Relations in Mobile Manufacturing2007In: Swedish Production Symposium, 2007Conference paper (Refereed)
  • 1000.
    Stillström, Carin
    et al.
    Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management. Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Jackson, Mats
    The Concept of Mobile Manufacturing2007In: Proceedings of the 2007 CARV Conference on Changeable, Agile, Reconfigurable and Virtual Production, 2007Conference paper (Refereed)
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