In this master thesis problem background and goals are first presented. In theoretical part numerus tools and methods that are used in quality are described. 7 basic quality tools and analysis of measurement systems are described more detailed. At the end of theoretical part, heat staking technology that is used in our process is described. Problem solving of our problem of high free running torque of electromotor was based on 8D method. In research methodology chapter the actual problem solving is presented. Starting point for making this problem priority to solve was high scrap and reclamation form buyer. Next is presented how we managed to improve incoming knurling bushing quality and MSA analysis of current measuring system. The design of improved measuring system is shown together with associated MSA analysis. The process of finding key component for high free running torque is described, temporary and permanent corrective actions are also presented. At the end of thesis comparison of scrap before and after key component change is shown.
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