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  • 1051.
    Strömberg, Niclas
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Klarbring, Anders
    Topology optmization of Structures with Contact  Constraints by using a Smooth Formulation and a Neested Approach2009In: Proceedings of the 8th World Congress on Structural and Multidisciplinary Optimization, June 1-5, Lisbon, Portugal, 2009, 2009Conference paper (Refereed)
  • 1052.
    Strömberg, Niclas
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Engineering mechanics and optimization.
    Massana, J.F.
    A soft contact formulation for modelling thin coatings2005In: Proceedings of Contact/Surface, the Seventh International Conference on Computer Methods and Experimental Measurements for Surface Effects and Contact Mechanics: September 5-7, Bologna, Italy, 2005., 2005Conference paper (Refereed)
  • 1053.
    Strömberg, Niclas
    et al.
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Tapankov, Martin
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Development of a successive response surface approach for reliability-based design optimization2011Conference paper (Other academic)
  • 1054.
    Strömberg, Niclas
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Tapankov, Martin
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Reliability Based Shape Optimization of a Knuckle Component by using Sequential Linear Programming2011Report (Other academic)
    Abstract [en]

    Deterministic successive response surface optimization is a most efficient tool for improving machine components. A possible drawback might be that the optimal design proposal is non-robust. For instance, a constraint on the von Mises stress mightn be violated for small changes in the optimal values of the design parameters. This might be checked after the optimization by performing robustness analysis. Another approach would be to replace the deterministic constraint on the von Mises stress with a probabilistic reliability constraint. This is the scope of the following paper. A sequential linear programming approach for reliability based design optimization is developed and implemented. The design variables are assumed to be normally distributed, where the standard deviations of the design variables can be given as coefficients of variation. A deterministic LP-problem is derived by performing a Taylor expansion of the constraint at the most probable point (MPP). The MPP is found by solving the optimality conditions using Newton’s method and the LP-problem is solved by an interior point method. The approach is efficient and robust. This is demonstrated by performing reliability based shape optimization of a real knuckle component to a heavy truck.

  • 1055.
    Suljkic, Dennis
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Al-Shekli, Abdulla
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Automatisk justering av styrskena på DG Flex Feeder 601: I samarbete med DETAB ECOMAT Automation AB2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report aims to give a detailed description of a project done in collaboration with DETAB ECOMAT Automation AB and concerns the design of one of its machine models. The goal is to find an applicable solution to automate a process that is currently performed manually. Over three months, work has been carried out gradually with preliminary study, concept generation and evaluation of potential solutions.

    The report describes the development process in design and product development focusing on safety as well as “Design for Assembly”, which aims to use only the necessary components for the intended function. For this reason the components are initially divided into the categories “components for motion” and “power transmission”. This in turn leads to different solution proposals and an optimal solution is found after screening.

    Finally, a component selection has been made with the help of their component supplier, Festo AB. The final solution proposal consists of a pre-and-post image of the design proposal, written description of the function and component drawing for the parts that need to be custom-made. After the end of this project, the suggested solution will be tested and evaluated before it potentially becomes a permanent part of the design.

  • 1056.
    Sun, Bei
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Poosti, Mehdi
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Long distance design-manufacturing interaction: Perspectives from Chinese manufacturing site2011Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    After opening of China‟s borders to foreign trade and investment, over the last decades, a growing number of foreign company‟s attention has been drawn to China due to the immense market potential, and a huge source of cheap labor. Swedish industry, however, is not an exception from this tremendous trend in the world, as their recent acquisitions have given access to production facilities in China. This transfer of product/production from Sweden to China has emerged two major concerns including Design and Manufacturing (DM) interaction between geographically distant settings, in conjunction with inter-cultural considerations.

    Lately, the concept of interaction between DM has been growing in the scholar thoughts. Typically, different challenges such as different personalities and cultural differences exist towards having an enhanced collaboration during the development process. This study uses a framework for integration mechanisms which comprises number of approaches such as DfX, CE, cross-functional teams, and modern quality management.

    Second, this study by carrying out 6 interviews within the Chinese plants in four Swedish-Chinese based companies identifies the main challenges of interaction of design in Sweden and manufacturing in China (2 pilot companies and 2 target companies). The most frequent challenges are spotted as cultural clashes, ineffective collaboration, frustrating verification process, inadequate management system, and lack of technical knowledge. By including cultural attributes, a literature based classification is adopted to classify the determined challenges.

    Eventually, this study comes up with suggestions for managing challenges associated with geographical distance. More face-to-face interactions instead of electronic communications in order to have a better insight to the cultural differences (such as trust, lose face, and direct/indirect confrontation), cross-functional integrations, localizing the verification process, facilitating the early involvement of suppliers, rotation of the expertise across projects, use of DfA index, and function-wise motivation system, are stated in our recommendations to cope with these challenges. Besides, the influence of reward system on challenges of dispersed settings, is proposed to be investigated for further studies.

  • 1057.
    Sun, Qian (Chayn)
    et al.
    Department of Spatial Sciences, Curtin University, Australia.
    Odolinski, Robert
    School of Surveying, University of Otago, New Zealand.
    Xia, Jianhong (Cecilia)
    Department of Spatial Sciences, Curtin University, Australia.
    Foster, Jonathan
    School of Psychology and Speech Pathology, Curtin University, Australia.
    Falkmer, Torbjörn
    Jönköping University, School of Health and Welfare, HHJ. CHILD. Jönköping University, School of Health and Welfare, HHJ, Dep. of Rehabilitation. School of Occupational Therapy and Social Work, Curtin University, Australia.
    Lee, Hoe
    School of Occupational Therapy and Social Work, Curtin University, Australia.
    Validating the efficacy of GPS tracking vehicle movement for driving behaviour assessment2017In: Travel Behaviour & Society, ISSN 2214-367X, E-ISSN 2214-3688, Vol. 6, p. 32-43Article in journal (Refereed)
    Abstract [en]

    Vehicle movement trajectory recorded by GPS maps the vehicle's lane position in time sequence, therefore theoretically can be used to assess driving behaviour. However, the data quality level which can be achieved for vehicle movement tracking by different GPS receivers and positioning techniques hasn't been fully explored and documented. This study systematically validated the efficacy of GPS recording vehicle movement using different types of receivers and positioning techniques. The receivers include both recreational and professional devices; the positioning techniques refer to Single Point Positioning (SPP), Differential GPS (DGPS) and Real-time kinematic (RTK) solutions. The field trials tested the positioning accuracy as well as the quality of trajectory tracking by comparing the recorded positions to benchmarks. The study findings indicate that vehicle movement trajectories recorded by recreational-grade GPS receivers can only match other spatial information at low resolution, which is limited to the assessment of wayfinding and navigation behaviour. In contrast, the SPP, DGPS and RTK techniques undertaken by professional receivers can raise horizontal accuracy to the metre, decimetre, and centimetre level respectively. For under open sky road driving, the RTK solution generated accurate and precise vehicle movement trajectories sufficient for extracting vehicle lane position, speed, acceleration/deceleration, so as to detect detailed driving events and quantitatively assess individual driver behaviour. This paper serves as a critical reference for other researchers on the different types of GPS receivers and solutions prior to engaging a GPS in their studies. © 2016 Hong Kong Society for Transportation Studies.

  • 1058.
    Sunnersjö, Staffan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Computer Supported Engineering Design.
    An experimental study of aspects of engineering knowledge used in engineering design: A design automation perspective2009In: NordPLM´09, Göteborg 28-29 januari 2009, Göteborg: Chalmers tekniska högskola , 2009Conference paper (Refereed)
  • 1059.
    Sunnersjö, Staffan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Intelligent Computer Systems in Engineering Design: Principles and Applications2016 (ed. 1)Book (Other academic)
    Abstract [en]

    This introductory book discusses how to plan and build useful, reliable, maintainable and cost efficient computer systems for automated engineering design. The book takes a user perspective and seeks to bridge the gap between texts on principles of computer science and the user manuals for commercial design automation software. The approach taken is top-down, following the path from definition of the design task and clarification of the relevant design knowledge to the development of an operational system well adapted for its purpose. This introductory text for the practicing engineer working in industry covers most vital aspects of planning such a system. Experiences from applications of automated design systems in practice are reviewed based on a large number of real, industrial cases. The principles behind the most popular methods in design automation are presented with sufficient rigour to give the user confidence in applying them on real industrial problems. This book is also suited for a half semester course at graduate level and has been complemented by suggestions for student assignments grown out of the lecture notes of two postgraduate courses given annually or biannually during the last ten years at the Product development program at the School of Engineering at Jönköping University.

  • 1060.
    Sunnersjö, Staffan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Planning design automation systems for product families: A coherent top-down approach2012Conference paper (Refereed)
  • 1061.
    Svensk, Johanna
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Schönning, Lisa
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Utveckling av ett snabblyftblock2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis was conducted in cooperation with Svero Lifting. The company is developing hoisting products. Today Svero Lifting is working to reduce the weight of the company’s components by changing the material and have now started a development of a new hoisting, a trolley and a chain block. Svero Lifting wants to continue the company’s hoist development so that the components coordinate with each other and excel on the market. At this point Svero Lifting has no CAD-models or drawings of the company’s products.

    The main purpose of the thesis is to create a new style of a chain block. The component’s shape and style shall reflect Svero Lifting and the company’s newly designed trolley. The second aim of the thesis is to implement modern technology in Svero Lifting’s product development.

    The authors’ goal is to style a new body that shall fulfil Svero Lifting’s requirements and reflect the company’s newly styled trolley. The company desires a less time consuming option for changing the hook. The authors’ want to enhance Svero Lifting’s product development by creating a base for CAD-models. The goals of the thesis is to deliver CAD-models and drawings of the chain block’s inner parts, to propose a less time consuming option for changing the hook and as well a new style of the chain block’s body to the company.

    Through the methods competitor analysis, visual brief, brainstorming and gut feel the authors’ created new concepts for the chain block’s shape. A pros- and cons analysis was created to decide the final decision of the concepts.

    In the result chapter the final concept of the body is presented. In the chapter CAD-models of the chain block’s inner parts, the newly designed body and the final option for changing the hook are presented.

    In the discussion chapter the authors discuss how the new style of the chain block body reflects Svero Lifting and harmonizes with the company’s new trolley. The authors are assuming that the company’s product development can be more efficient by introducing CAD-models. The base of CAD-models can for instance be used in a database or simulations.

  • 1062.
    Svensson, David
    et al.
    Jönköping University, School of Engineering.
    Persson, Jörgen
    Jönköping University, School of Engineering.
    Automatisering av intern materialhantering2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 1063.
    Svensson Harari, Natalia
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Bruch, Jessica
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Jackson, Mats
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Flexibility Needs and Enablers in Assembly Systems2013In: 22nd International Conference on Production Research, ICPR 2013, International Foundation for Production Research (IFPR) , 2013Conference paper (Refereed)
    Abstract [en]

    The purpose of the research presented in this paper has been to analyze flexibility needs and enablers in assembly systems. The methodology used for the research has been a literature review and a case study at a Swedish manufacturing company. Flexibility as a competitive factor has been shown to be needed in order to satisfy the changing demands, at low cost and with delivery precision. The level of customization and changes in volume also increases the flexibility needs. The results from the case study indicate that there are four flexibility enablers in assembly systems: capacity and production planning, production development, material supply, and work organization. The needs of flexibility should be considered during the design process of the assembly system to respond to changes in product variants and production volumes in a cost-effective way.

  • 1064.
    Svensson Harari, Natalia
    et al.
    Mälardalens högskola, Innovation och produktrealisering.
    Bruch, Jessica
    Mälardalens högskola, Innovation och produktrealisering.
    Jackson, Mats
    Mälardalens högskola, Innovation och produktrealisering.
    Mixed-Product Assembly Lines: Characteristics and Design Challenges2014Conference paper (Refereed)
  • 1065.
    Svensson, Johan
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Thorup, Jonathan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Minskning av produkter i arbete vid monteringsområde2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In the automotive industry there is a high focus on profitability and to constantly renew its product range. Companies are constantly working to make their processes more effective and achieve higher productivity. As a subcontractor to the automotive industry, this is something that you continuously work with. The pressure from customers who want cheaper products means that Kongsberg Automotive AB will need to work with its processes to keep its customers and to remain profitable. Kongsberg Automotive AB has an assembly area that does not meet the required standard. By lowering the WIP (work in progress) level, the material is reduced in the area. This should be achieved by making the material handling more effective.

     

    The aim of the study was to identify the activities that contribute to a high WIP level and unnecessary material handling. Once identified, these activities would be reduced or eliminated entirely to increase the efficiency of the material handling and also to increase the productivity in the assembly area.

     

    In order to identify how much of a workday that disappears due to inefficient material handling, a frequency study was made. The frequency study identified all non-value added activities and their share of the total work. Some of the activities that were of non-value added nature could be linked to the problem WIP. For these activities action proposals were formed. A VSM (value stream map) was conducted to get the bigger picture of all products included in the assembly area, and this analysis provided a basis for the action proposals.

     

    The result of the frequency study showed that 19,5% of the activities in the assembly area fell under the category of non-value added activities. The root cause of why this category was 19,5% of the total working day was analyzed. Three action proposals were designed to reduce non-value added activities and to make the material handling more efficient. These three action proposals were kitting of the products, kitting of the packaging, and also to add the small components to the line feeding, that should already have belonged there.

  • 1066.
    Svensson, Kalle
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Andersson, Oscar
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Effektivisering med avseende på buffertreducering2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Examensarbetet är utfört på företaget Scandinavian Business Seating i Nässjö som tillverkar kontorsstolar, mötes- och konferensmöbler. I dagsläget är företaget inte nöjd med hur materialflödet mellan ett biflöde och huvudflöde ser ut. Buffertlager uppkommer på grund av de olika takterna som flödena har.

  • 1067.
    Svensson, Marcus
    et al.
    Jönköping University, School of Engineering.
    Gränsmark, Arvid
    Jönköping University, School of Engineering.
    Digital konstruktion samt verifiering av hjulupphängning till JU Solar Team´s solbil 20192019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    There is a need to improve the JU Solar Team's new solar cell powered electric car's driving capabilities for the Bridgestone World Solar Challenge 2019. Partly to improve the car's safety and the ability to meet the competition requirements, but also to minimize effects that contribute to increased rolling resistance. The work is carried out at Jönköping Institute of Technology with support from ÅF Automotive in Trollhättan. The work aims to parameterize driving characteristics with engineering requirements, evaluate how the rolling resistance can be minimized, how negative driving characteristics can be minimized and a weight comparison with wheel suspension from 2017. This is the basis for the construction of the 2019 wheel suspension adapted for new body designed and manufactured in parallel with this work.

    The study includes performed measurements of the side force impact on steering angle change and camber change, calculation of load case, concept generation and evaluation, computer-aided strength evaluations.

    The results of the survey show great weaknesses in the 2017 solar car. In the case of an applied side force in the front wheel, a large wheel angle change occurs. This is largely due to under-dimensioned steering arms and the geometric design of the points. The influence of the side force on the steering angle has theoretically been reduced by at least 44% verified in CAD environment. In addition to this improvement, the entire wheel suspension system's attachments and sub-components are stiffer, which should contribute to an even greater improvement. The study also shows that the steering angle was insufficient to meet the competition requirements, which could be improved by 21.2% greater steering angle on the wheels.

    The spring and damper's operating ratio in comparison with the wheel has also been evaluated and has been able to be increased from 31% to 51.5%. This leads to reduced forces on the link arms and body by 20.5% during the same external load case.

    The study is limited to evaluating the hard points of the wheel suspension as well as the strength and design of the link arms, steering arm, suspension and damping attachment.

  • 1068.
    Svensson, Philip
    et al.
    Jönköping University, School of Engineering, JTH, Supply Chain and Operations Management.
    Blom, Johannes
    Jönköping University, School of Engineering, JTH, Supply Chain and Operations Management.
    Critical Factors for Production Ramp-up in High Technology Companies: A case study at an aerospace company2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Purpose - A research gap was identified in relation to the production related factors during ramp-up. Therefore, the purpose of the study was to “simplify production ramp-up by defining how measures could be prioritised in high technology company.”

    Method – The study used a single-case study method with a qualitative and explorative approach. This method was used to gain in-depth knowledge of the case. The study was conducted at Saab, a high technology company within the aerospace industry.

    Findings – The findings included a list of critical factors for ramp-up control and two additional critical factors that are relevant to high technology companies, along with five additional measures. From the case the main critical factors were related to personnel, education and experience.

    Implications – The study has contributed with a simplified ramp-up control method with implications for high technology industries. The new method will contribute to a more effective time to volume phase relevant for both practitioners and researchers.

    Limitations - As the study uses a new ramp-up control method it has only been applied to one case. The complete data from the case cannot be showcased due to secrecy.

  • 1069.
    Svensson, Tobias
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Schmidt, Malin
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Den dolda kapaciteten: Identifiering och grundorsaksanalys av potentiell kapacitet i en produktionslina.2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Most manufacturing companies are run with the purpose of making money. The profit can be created in two ways. On one hand through the difference between the earnings and the expense and on the other hand through the number of products that are sold within a certain time period. As demand increases a company can ramp up their production but this can come at a loss of the need to do big investments through machines, production lines, personnel and buildings which increases the risk of lowering the profit per product.

    Kabe, in Tenhult, is today producing two different kinds of RVs, on the one hand semi- integrated which are basically a house of the back of a truck and on the other hand fully integrated where you build a vehicle on top of an empty chassis. The big difference in the amount of work needed in assembling has led to Kabe deciding to separate the two different kinds of RVs in their own assembly lines in the RV factory. To be able to fit these lines in the building the manufacturing of certain big components, that is roofs, walls and floors, have been moved to a separate building and the work then commenced in trying to balance the assembly lines. Kabe is growing in their field and is expected to have an increase in sales in the coming years but the manufacturing of big components, which is now located in the component factory, has fallen behind when it comes to capacity evaluation leading to Kabe not knowing if the component factory is going to be able to keep up when the production speed is increased.

    To get a number on the potential capacity in the component factory a work sampling study is performed where different non-value adding activities are identified. These are eventually supposed to be eliminated or, in the case of them being necessary but non-value adding activities, reduced. A 5 Whys-analysis is performed with input from operators and leaders to be able to identify the root causes of the different activities and different suggestions of action are then presented as a guide towards the right direction to be able to uncover this “hidden” capacity.

    The result of the work sampling study suggests that the component factory is utilized to about 50 % at the moment which gives it a potential capacity of almost double of today’s capacity. Underlying causes for this primarily depend on the milling machine, imbalance between different serial stations, problems with operator planning due to the everchanging demand from the customer on the assembly lines as well as that the company has put in more resources and done changes without documenting or planning the effects that this will have on the company in the long run but there are possible solutions to all of this.

  • 1070.
    Svensson, Ulrika
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Utvärdering och Implementering av underhållssystem: Evulation and implementation of a Maintenace Management System2006Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    This Bachelor Thesis deals with how to prepare a computerization of a Maintenance Management System. The Bachelor Thesis is written by commission at Lear Corporation in Torslanda, Sweden. The paper is divided into two parts: evaluate a software and document all preventive maintenance. The purpose is to get better control and planning of preventive maintenance in the future. Tekla™ Maintenance is the software that is going to be evaluated.

    The aim is to document all preventive maintenance for two of three production lines at Lear Corporations factory at Torslanda, Sweden.

    The research shows that Tekla™ Maintenance met the specifications. One of the basic requirements was to automate the management of prevention maintenance activity, by issuing work order. Furthermore a user friendly interface was required. A description of Tekla™ Maintenance is included in the report.

    To get a feeling of how the programme perform in real world, benchmarking was preformed against Plastal AB. The benchmarking resulted in that Plastal AB recommended the Tekla™ Maintenance programme.

    Currently the documentation does not contain enough detailed information to allow a thorough review of all production lines.

    By dividing all lines into zones, all activities at each zone have been documented.

    Feedback form the operators was given, about what type of preventive maintenance that is required.

    To be able to put all the information into Tekla™ Maintenance, an Excel file has been made. This file contains over 2000 entries and should provide a solid base for future preventive maintenance.

  • 1071.
    Swaroop, Rajagopal
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design, JTH, Product design and development (PDD).
    Concept Development of an Inflatable Roof Box using Drop-Stitch Fabric2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The purpose of this project is to design a roof box for Urban users living in modern houses. Usually, the compactness of these houses does not allow the luxury of owning traditional hard-shelled roof boxes. Taking inspiration from the inflatable technology used in stand-up paddleboards and kayaks, this project explores the possibility of implementing the drop-stitch material for fabricating an inflatable roof box.

    The drop stitch fabric was first developed in the early 1950s by Goodyear for their inflatable aeroplanes. Although most of its early applications were classified by the military, the drop stitch material is presently being implemented in various products such as Kayak, AirTrack, Inflatable Cooler etc.

    The scope of this thesis remains within concept design, which is an early phase of product development. Following the three stages, background research, concept generation, and concept evaluation, the project implements various conventional and intuitive research methods, such as literature review, brainstorming, prototyping, testing etc.

    The project was a collaboration between Industrial Design and Product Development, which made it possible to view the project from different perspectives. It explores various design aspects, such as shape, form, curvatures, ergonomics etc. and engineering aspects, such as strength, stiffness and structural integrity.

  • 1072.
    Syrén, Andreas
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Crnoja, Ivan
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Kass Afrem, Malek
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Kvalitetssäkring2008Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    This thesis has been made in cooperation with Forsheda Stålverktyg AB which develops and manufactures injection moulds and diecasting tools. The main concern has been their Trading-system which provides them with considerable amount of quality lost function.

    Focus has to however be put on the analysis of the Trading-system due to the fact that this has previously meant various quality issues for the company.

    This thesis treats quality assurance of the Trading-system, identification of the problems in the process and improvements of these problems.

    Quality assurance is carried out when a company detects that their quality based costs become too high. Quality based cost are” the costs that would disappear if a company's products and its different operational processes were absolute” (Sörqvist, 2001 p.30, free translation from Swedish). High quality based costs often result in increased quality problems, which can lead to substantial economic loss for the company.

    This work has resulted in a thorough review of the Trading-system whereupon problems have been identified. In order to assure the quality process and lower the quality based costs, we have developed a control system. This, in order to avoid earlier made mistakes and assure that further problems with the system don’t occur.

    The developed system will result in more responsibilities for the customers, especially when reviewing the tool drawing and prototype. Thereby the errors and the quality based costs will decrease.

  • 1073.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    Allert, Anna-Lena
    Jönköping University, School of Engineering, JTH. Research area Industrial Production. Högskolan i Skövde.
    Business support agencies introducing lean production in SMEs – does it make any difference?2014In: Proceedings of the 6th Swedish Production Symposium, September 16-18, Göteborg, Sweden, 2014Conference paper (Refereed)
  • 1074.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Aresu, Emanuela
    Assembly System Design and Evaluation of 15 Manufacturing Companies in Sweden2002In: Manufactoring Systems, ISSN 0748-948X, Vol. 31, no 1Article in journal (Refereed)
    Abstract [en]

    In manufacturing companies a gap between theory and practice concerning systematic design and evaluation of assembly systems is discerned. In this paper a number of questions are raised to enhance the understanding of the associated problems in order to reduce the gap. The assembly system design and evaluation process is considered as a means to achieve the goal, a successful assembly system. The relation between how companies work with assembly system design and evaluation and some decisive circumstances are identified. The questions are discussed outgoing from empirical results. Potentials for improvements in design and evaluation of assembly systems are identified.

  • 1075.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Berglund, Martina
    KTH.
    Gustavsson, Maria
    LiU.
    Harlin, Ulrika
    Swerea IVF.
    Learning and Competence Driven Product Introduction2008Conference paper (Other academic)
  • 1076.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH. Research area Industrial Production. Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Berglund, Martina
    Linköping university.
    Harlin, Ulrika
    Swerea IVF AB.
    Gustavsson, Maria
    Linköping university.
    Development activities in product introductions – a cross functional approach2011Conference paper (Other academic)
  • 1077.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Harlin, Ulrika
    Swerea IVF.
    Fjällström, Sabina
    Chalmers.
    Berglund, Martina
    KTH.
    Proactive and Reactive Ways of Managing Product Introduction2008Conference paper (Other academic)
  • 1078.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Johansson, Glenn
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Lakemond, Nicolette
    LiTH.
    Magnusson, Thomas
    LiTH.
    Managing Interfaces in the Industrial Innovation Process2008Conference paper (Other academic)
  • 1079.
    Säfsten, Kristina
    et al.
    LiU, IKP.
    Winroth, Mats
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Analysis of the congruence between manufacturing strategy and production system in SMME2001In: MANUFACTURING INFORMATION SYSTEMS: Proceedings of The Fourth SMESME International Conference Stimulating Manufacturing Excellence in Small & Medium Enterprises / [ed] Hans-Henrik Hvolby, 2001, p. 95-102Conference paper (Refereed)
    Abstract [en]

    A production system must reflect a company’s manufacturing strategy and the chosen competitive priorities. Tools to assess the congruence between the manufacturing strategy and the production system can hence support the companies’ competitive position. In this paper, the usability of an analysis model suggested by Miltenburg (1995), aiming at mapping manufacturing strategy and production system is investigated. The usability of the analysis model is investigated in terms of the ease to use it and in terms of the obtained results. The investigation is performed by means of empirical studies in two medium sized manufacturing companies. The result is that the model seems to be useable in the senses that, if knowledge about the underlying principles in the analysis model is at hand, it is possible to investigate the congruence between manufacturing strategy and production system. It is, however, believed that the analysis model needs some further development to be considered an easy to use tool for e.g. the SMME production manager.

  • 1080.
    Säfsten, Kristina
    et al.
    LiU, IKP.
    Winroth, Mats
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Analysis of the congruence between manufacturing strategy and production system in SMME2002In: Computers in industry (Print), ISSN 0166-3615, E-ISSN 1872-6194, Vol. 49, no 1, p. 91-106Article in journal (Refereed)
    Abstract [en]

    A production system must reflect a company’s manufacturing strategy and the chosen competitive priorities. Tools to assess the congruence between the manufacturing strategy and the production system can hence support the companies’ competitive position. In this paper, the usability of an analysis model suggested by Miltenburg (1995), aiming at mapping manufacturing strategy and production system, is investigated. The usefulness of the analysis model is investigated in terms of how easy it is to use and in terms of the obtained results. The investigation is performed by means of empirical studies in two medium sized manufacturing companies. The result is that the model seems to be useful in the sense that, if knowledge about the underlying principles in the analysis model is at hand, it is possible to investigate the congruence between a manufacturing strategy and a production system. It is, however, believed that the analysis model needs some further development to be considered an easy to use tool for e.g. the SMME production manager.

  • 1081.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH. Research area Industrial Production. Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Winroth, Mats
    Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    Manufacturing strategies supporting competiveness in SMME2011Conference paper (Other academic)
    Abstract [en]

    Research on manufacturing strategies has been quite extensive during the past 40 years. The work has however been mostly focused on large companies. It has also mostly had a top-down approach, emerging from the view of top management based on market requirements, not taking production capabilities into consideration. It is however necessary to make a reconciliation of capabilities and competitive factors. In this paper we present the first results from a project on manufacturing strategies in small and medium sized manufacturing enterprises, SMMEs, in Jönköping region Sweden. This first step of the three year project is a survey and diagnosis of the present situation in the participating companies. We can see that the companies show different degrees of strategic maturity, which to some extent could be the consequence of them acting in different industrial areas with varying requirements, traditions and values. A common learning is that, even if the company does have a well-developed manufacturing strategy and ideas about future development, the communication out in the organization to employees is lacking. This leads to reduced sense of responsibility and commitment among the personnel.

  • 1082.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH. Research area Industrial Production. Jönköping University, School of Engineering, JTH, Industrial Engineering and Management.
    Winroth, Mats
    Chalmers university of technology.
    Manufacturing supporting strategies in SMME2011In: , 2011Conference paper (Other academic)
  • 1083.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    Winroth, Mats
    Chalmers university of technology.
    Löfving, Malin
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    Development of a manufacturing strategy framework for SMEs2014In: Proceedings of the 21st EurOMA Conference, June 20-25, Palermo, Italy, International Annual EurOMA Conference, 2014Conference paper (Refereed)
    Abstract [en]

    Small and medium-sized enterprises (SMEs) are very important to European industry, acting as suppliers to global companies, but also as OEMs. To keep up with competition from global sourcing, they however need to be pro-active and have clear ideas on how to compete. In this work, manufacturing strategies may constitute the necessary guidance. In this paper we present the development of an analytical tool for manufacturing strategy formulation, easy to use and thus suitable to SMEs, who often lack resources in terms of competence or money.

  • 1084.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    Winroth, Mats
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Production. Institutionen för teknikens ekonomi och organisation, Operations Management, Chalmers.
    Löfving, Malin
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Production. Institutionen för teknikens ekonomi och organisation, Operations Management, Chalmers.
    Requirements on manufacturing strategy frameworks for SMME2012In: Proceedings of Swedish Production Symposium, 2012Conference paper (Refereed)
    Abstract [en]

    Small and medium-sized enterprises are crucial for national finances and economic growth. For small and medium-sized manufacturing enterprises (SMME) it is essential for competiveness that manufacturing supports the overall company goals. Despite this, previous investigations show that it is mainly larger companies that are aware of the role of manufacturing for competitiveness and therefore formulates manufacturing strategies. The purpose of this paper is to increase the understanding about how manufacturing strategy formulation can be facilitated within SMME, and specifically on requirements that are raised on frameworks to support the work with manufacturing strategy processes. The presented results are based on five case studies, carried out in five different small and medium-sized units/companies. The result indicate that they on the one hand want the framework to be easy to understand and to use, but on the other hand it should be comprehensive, and it should provide recommendations for actions. Furthermore, a framework has to consider aspects related to the actual work procedure, the use of the framework, and with the outcome of the work. This analysis provides a valuable foundation for the on-going work of developing a framework for manufacturing strategy formulation adapted to the characteristics among SMME.

  • 1085.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    Winroth, Mats
    Jönköping University, School of Engineering, JTH. Research area Industrial Production. Chalmers University of Technology.
    Löfving, Malin
    Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    STRATEGO - Manufacturing strategies supporting competitiveness in small and medium-sized manufacturing enterprises: A Handbook2014Report (Other academic)
  • 1086.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    Winroth, Mats
    Chalmers university of technology.
    Löfving, Malin
    Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    STRATEGO Produktionsstrategier som stöd för konkurrenskraft i små och medelstora tillverkande företag – en handbok2014Report (Other academic)
  • 1087.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    Winroth, Mats
    Chalmers university of technology.
    Löfving, Malin
    Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    Usability of a manufacturing strategy framework developed for SMEs2014Conference paper (Refereed)
    Abstract [en]

    Still, 45 years after Skinner’s (1969) call for manufacturing strategies, explicit manufacturing strategies are scarse in manufacturing industry, especially in SMEs. Together with a number of SMEs, we have developed a manufacturing strategy tool, aimed at supporting manufacturing strategy formulation. In this paper, the focus is on requirements on a manufacturing strategy tool related to the usability in SMEs. Results from evaluation of the tool during development is presented. The resulting tool was considered to be useful to the participating companies, helping them to get over the initial treshold of working with manufacturing strategies.

  • 1088.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Winroth, Mats
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Stahre, Johan
    The content and process of automation strategies2005Conference paper (Other academic)
    Abstract [en]

    Modern manufacturing systems are often semi-automated, i.e. integrating both manual and automated op-erations. Our studies show that decisions on how, and even if, automation should be realized often are taken in an ad hoc manner. Improved efficiency in production through automation could be achieved with better precision if a more conscious approach towards automation was used. We argue that it is essential to formulate explicit automation strategies, which will provide guidance to the appropriateness of automa-tion in different situations. Further, it should give advice as to the most suitable degree of automation needed. Two different perspectives on automation strategies have been identified through a literature re-view and empirical studies. The first perspective is when decisions concerning automation are treated as one of several decisions in a manufacturing strategy. The second perspective is when the overall manufac-turing strategy is equal to an automation strategy, i.e. the strategy is automation. The paper elaborates on the content and process of automation strategies, i.e. what must be included in a strategy and how is it formulated.

  • 1089.
    Säfsten, Kristina
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Winroth, Mats
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    Stahre, Johan
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Engineering and Management.
    The content and process of automation strategies2007In: International Journal of Production Economics, ISSN 0925-5273, E-ISSN 1873-7579, Vol. 110, no 1-2, p. 25-38Article in journal (Refereed)
    Abstract [en]

    If automation is to support the competitiveness for a manufacturing company, strategic as well as operational issues need consideration. To best support competitiveness, decisions concerning automation should be treated as one of several decisions in a manufacturing strategy. Furthermore, to fully utilise the advantages from automation, the manufacturing strategy content and process needs refinement. In this paper improvement of the manufacturing strategy theory is suggested, mainly based on employment of human factors engineering.

  • 1090.
    Söderberg, Daniella
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Rom, Sandra
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Frigöring av kapacitet i ett kundorderstyrt företag2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Rapporten syftar till att belysa de olika metoder som finns för att frigöra men också synliggöra tillgänglig kapacitet. Det efterfrågades av fallföretaget, då de efter att ha börjat tillverka ytterligare en variant i fabriken i Jönköping fick problem att göra klart alla ordrar i tid. Fallföretaget monterar elmotorer i sin fabrik.

     

    För att lösa problemet har studenterna valt att använda sig av en kvalitativ metod. En fallstudie på fallföretaget, SEW Eurodrive, har genomförts. Under arbetets gång har studenterna använt sig av intervjuer och observationer för att finna nödvändig information för att föra arbetet framåt.

     

    För att kunna visa företaget hur stationen kan balanseras på ett bättre sätt gjordes observationer. Utifrån de observationer och mätningar som gjorts insåg studenterna att monteringen är uppdelad i tre moment och att det är moment två som tar längst tid. Layoutförslagen som bifogas till rapporten utgår från att det är moment två som är problemet. De bygger till stor del på hur fallföretaget skulle kunna bygga om stationen för att på så sätt frigöra mer kapacitet och förbättra arbetssättet.

     

    Eftersom arbetet är av mer teoretiskt karaktär är det svårt att peka på ett tydligt resultat av den uppställda empirin. Genom att göra en liten ändring i stationens uppbyggnad skulle arbetet kunna flyta på bättre och möjliggöra att flera personer kan arbeta på stationen samtidigt.

     

    Det generella syftet med rapporten begränsas av att en fallstudie har gjorts på ett kundorderstyrt företag. De företag som tillverkar mot lager kan använda sig av dessa metoder, men måste då vara medvetna om skillnaderna mellan ett kundorderstyrt företag och ett företag som tillverkar mot lager.

  • 1091.
    Söderkvist, Gustav
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Lindström, Elsa
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Konceptuell studie av hållare för förenkling av inköp2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This examination thesis includes a master thesis written by two graduate students studying product development and design at the school of engineering at Jönköping University. The assignment consisted of producing a product suggestion that facilitates handling of a shopping list at a grocery store.The thesis resulted in a final concept that were apprehended by creating a functioning prototype. The product consists of a plate, an attachment for a shopping cart, two snap-in strips, a lid and a penholder. The product has a smooth attachment that facilitates assemblage of the product and makes it suitable for the customers’ demands.The assignment originates from the one-man enterprise Sirge AB that in its turn took contact with the consulting firm Sigma Industry. The company weren’t established within the product development sphere and therefore didn’t possess the right expertise that were needed to get the job done. The contact person at Sigma Industry considered the assignment suitable to be done as a thesis.Sirge AB had found a gap in the market for products that simplifies the problem for customers at the grocery store. The request from the client were to develop a product that easily could be attached to a shopping cart and facilitate the handling of a shopping list. The reason for this were to avoid keeping multiple things in the hand at the same time and instead free the hands for grocery shopping. To achieve the objective, three questions of formulation were formed that were summed up with a main question of formulation:“How will a helping device be design to facilitate the handling of a shopping list at a grocery store, and also be flexible enough to handle both analogue and digital lists, be customer owned and with right material choose?”To answer the main question the project group applied the method of Bootcamp Bootleg. The work commenced with a pre study with the purpose to examine the interest amongst the future customers and create a focus group. A market research were also made to see which competitors that were already on the market and to see how well the new product would fit into the market. Several concepts were developed through the method brainstorming and were then evaluated through a SWOT analysis and an elimination matrices. The concepts that were chosen were then developed in the CAD program SolidWorks.The final concept consisted of a plate with the primary function that makes it possible to attach a shopping list. The product also offer secondary functions like a holder for a pen, a phone, and extra space for storage of other objects. The main part of the product were produced in 3D printing. The snap-in strips and parts of the attachment is standard components. The penholder were made out of leather and the lid in Plexiglas to give it a nice look.

  • 1092.
    Söderlund Valencia, Lorens
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    PARAMETRISERAD DESIGN APPLICERAD PÅ EN MOTORSÅGSKEDJA2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The main objective of this thesis was to develop appropriate strategies and find factors that affect the usability of parameterized designs. This was accomplished by investigate the user-interface and how it is designed to meet the user's information needs. The thesis also embraces the basic theories in terms of investigation, cognitive design principles and human behavior patterns in the interaction with the machine. The approach has led to an explorative investigation in this subject area.

    The thesis also had the purpose to achieve more efficient ways for development of motor chainsaws at Husqvarna AB's department Global Cutting Equipment. That can be achieved through reduce costs of development per sold unit. To reduce cost depends to what extend the program is helping the user to achieve goals during the design execution. The thesis also includes an investigation of the factors that affect the design of such a program. To explore appropriate strategies was a theoretical design process implemented in the study. From the perspective of technology has the author utilized knowledge in engineering design and programming. The program approach utilized was Visual Basic languish in Visual Studio enviroment for the user-interface and a Catia V5 CAD-platform for the chainsaw design.

    The result is a program which could use reconfigured parameters as needed to create customized designs correctly and effectively. This thesis has also resulted in appropriate principles for the design of a user-friendly interface that were up for the task to be a supporting tool through the execution. It has also been established appropriate tools and methods for analysis and optimization of the program. The author feels that the results of methods and principles in this study were of high reliability and can therefore be applied to other projects, even if the results only are valid for this specific case.

  • 1093.
    Söderström, Mats
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Sandberg, Martin
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Analys av provkörningsprocessen på Wexiödisk AB2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study has been conducted in cooperation with Wexiödisk AB. The study has taken off in the Wexiödisk’s testing process, where all dishwashers are tested for function and safety before they are delivered to the customer. The test process is complex where several sub processes are included, including high voltage testing and insulation measurement.

    The study's questions are based on the problems that Wexiödisk experiences with the current test procedure. The authors have chosen to focus on three problem areas: Deviation management, Traceability and Usability. These are included in the overall area of ​​the study, which is referred to as quality assurance.

    To achieve the purpose of the study, a current position description was made to describe the current situation at the test station. Through examination of internal documents as well as observations and interviews, the test process has been described.

    The study's analysis has shown that the large variant management of Wexiödisk leads to ambiguity of the current test procedure and the fact that the test protocols are largely unused. In addition to this, it was found that traceability on component components is lacking, and that there is no control that all test components have been performed in the final test.

    To address these issues, the authors suggests that individualized test run protocols for all hardware variants should be developed. Furthermore, it is suggested that the test run procedure should be digitized. The digitized test run procedure is proposed to contain a standardized sequence order to reduce the variation in the test run process. In order to be able to identify shortcomings in the production process in the long run, it is also suggested that the test run report contains a deviation report.

  • 1094.
    Sörensen, Kim
    et al.
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Wiktorsson, Magnus
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Jackson, Mats
    Mälardalens högskola, Akademin för innovation, design och teknik.
    Towards a manufacturing strategy supporting make or buy decisions and a global manufacturing structure2009In: Swedish Production Symposium 2009, Goteborg, 2009Conference paper (Refereed)
  • 1095.
    Taghavi, Naghmeh
    et al.
    Chalmers University of Technology.
    Kjellsdotter Ivert, Linea
    Chalmers University of Technology.
    Winroth, Mats
    Jönköping University, School of Engineering, JTH, Industrial Engineering and Management. Jönköping University, School of Engineering, JTH. Research area Industrial Production.
    Sustainable Operations Management; from concept to action2014In: Proceedings of the 1st International EurOMA Sustainable Operations and Supply Chain Forum, International Annual EurOMA Conference, 2014Conference paper (Refereed)
    Abstract [en]

    The concept of sustainable development has emerged into manufacturing since late 1990s and has focused on increasing competitiveness by improving environmental and social performance. Considering the global competitive environment, legislations, and customers’ awareness of sustainability issues, companies are expected to be aware of their impact on the triple bottom line i.e. people, planet, and profit. The purpose of this paper is to explore how companies go from vision of sustainability to accomplish sustainable operations management. Multiple case studies are conducted to provide findings on how sustainable operations management can be expressed in terms of the principles, practices, and tools.

  • 1096.
    Tao, Jiyue
    et al.
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Aziz, Asnaf
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Simulation of thermal stresses in a disc brake2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The heat flux produced from the friction between a disc and pad system leads to a high temperature which causes thermal stresses in the disc and after a number of repeated braking cycles, cracks might be initiated. The finite element analysis (FEA) is performed to determine the temperatures profile in the disc and to analyze the stresses for the repeated braking, which could be used to calculate the fatigue life of a disc.Sequentially coupled approach is used for thermo-mechanical problem and the problem is divided into two parts, heat analysis and thermal stress analysis. The heat analysis is obtained by including frictional heat and adopting an Eulerian approach. The heat analysis is conducted by using Abaqus and the toolbox developed by Niclas Strömberg. The thermal stress analysis, which is the main focus of this thesis, is followed using Abaqus. The plasticity theory as background for stress analysis is discussed in detail. The rate independent elasto-plastic plasticity is used in the stress analysis. Temperature independent material properties are considered throughout the thesis work.Isotropic, kinematic and combined hardening models are analyzed for simple 2D academic models for different types of cyclic loads. A benchmark disc and pad model, which is less complicated than the real disc-pad model, is also studied. The linear kinematic hardening model with rate independent elastic-plastic plasticity is used for benchmark and real disc-pad model. The results of the benchmark model and the real model are observed to be similar in terms of plasticity theory.

  • 1097.
    Tapankov, Martin
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Reliability Design in Structural Optimization - Literature Survey2013Report (Other academic)
    Abstract [en]

    This survey focuses primarily on the historical development of RBDO and the various classes of methods which emerged through the years. While reviews on contemporary RBDO methods have been done previously, they haven’t incorporated the basis on which such developments were possible in the first place — risk-based design and limit-state design. This study attempts to link the RBDO field with these methodologies for a more complete picture of the field of reliability and safety.

  • 1098.
    Tapankov, Martin
    et al.
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Strömberg, Niclas
    Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.
    Sampling- and SORM-based RBDO of a Knuckle Component by using Optimal Regression Models2012In: the proceedings of the 14th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, American Institute of Aeronautics and Astronautics, 2012Conference paper (Refereed)
  • 1099.
    Tatham, Peter
    et al.
    Griffith Business School.
    Kovács, Gyöngyi
    Hanken School of Economics.
    Vaillancourt, Alain
    Hanken School of Economics.
    Evaluating the applicability of sea basing to support the preparation for, and response to, rapid onset disasters2016In: IEEE transactions on engineering management, ISSN 0018-9391, E-ISSN 1558-0040, Vol. 63, no 1, p. 67-77Article in journal (Refereed)
    Abstract [en]

    Using four case studies of the response of the international community to major rapid onset natural disasters, this paper analyzes the advantages and challenges inherent in the provision of logistics support through the use of a floating warehouse; otherwise known as “sea basing.” Through a comparison of the costs and benefits of the use of alternative sea-basing models with the actual cost of air transport incurred, this paper demonstrates that the use of sea basing would offer responding agencies significant cost and flexibility benefits, and that the concept has the potential to be extended significantly through the use of a bespoke vessel rather than a standard commercial container ship.

  • 1100.
    Tavajoh, Sara
    et al.
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Michael, Huynh
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Marknadsundersökning kring additiv tillverkning i Sverige2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Within the industrial sector, an increased interest and usage of Additive Manufacturing (AM) throughout the decade has been formed. The layer-upon-layer building technology has been seen and recognized as one of the next industrial revolutionizing methods of production. As the technology is still in the trending and uprising phase it should be considered that its full potential has not yet been achieved, as large opportunities for implementation of AM exist and that new companies and markets have a growing interest in this technology.

    Through this study a market research was conducted to identify and present what opportunities and obstacles there are for an increased usage of AM in Sweden. A literature study on the Swedish market has been made to present the market as of today. Eight qualitative interviews have also been conducted with companies within the industrial sector to identify the areas of use within AM for production. The concepts and models used to analyze these questions was PEST, Marketing Mix and SWOT.

    The concluded results for advantages in using AM are shortened lead times, reduced costs of production of components and tools, reduced material waste and optimization of design processes with increased creativity. The concluded challenges are expensive materials and machine, the quality of finished components, limited printing volume due to the 3D-printers and reliability of printing processes. The finalized opportunities that are presented in this work are that AM is dependent on how much research on the subject and factors around it is done. How AM will be applied in the coming future revolves around the advancement in the technology. The obstacles that are found in this study are lack of competence and lack of standard for materials and processes within AM.

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Output format
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  • asciidoc
  • rtf