Having a high quality of its production is important for all companies, the quality must be high both during and after the processing process. In order to maintain a high quality, companies should actively work to strengthen their quality. This thesis deals with the quality problem that paint damage entails for the company. A well-proven method in quality technology is to carry out a root cause analysis in the event of repeated quality deficiencies of a similar type.

By building an understanding of production, a feasibility study was conducted on the current situation. The feasibility study provided a deeper understanding of the vital building blocks of production, but also much about theories about Lean production, which is a corporate strategy on which the company builds its production. The description of the current situation provided an understanding of how big the problem of paint damage was for the company. The description also showed that at present only five why is used, which is the method for finding root causes for quality deficiencies.

Based on the company's pursuit of Lean production without losses, a root cause analysis was applied for the paint damage to the cab line to identify its actual cause of the damage. These reasons are further discussed and set against the proposed measures that were developed together with employees at the company. The proposed measures were then ranked from largest to smallest likely to be implemented in the future.

Finally, the conclusions and recommendations on which the study was based are presented.