ABSTRACTION This thesis is focus on discussion of how automobile fastener manufacturer in Taiwan practice QS9000-PPAP and what is different between domestic and foreign automobile fastener suppliers. Chapter 1 makes a brief introduction in this thesis, including research purpose¡Bresearch motive¡Bresearch method and research structure. Chapter 2 describes QS9000 history and discusses some relational writings. Automobile fastener is getting popular in Taiwan fastener industry, because the unit profit is much better than regular parts. Almost automobile parts suppliers in Taiwan only make OEM parts, and because of this reason, it is no need to process fully QS9000 system, however, it is absolute to practice PPAP before mass production. Customers require PPAP based on protection reason, and PPAP can protect customers and OEM factory from any error. At present, there are only few factories in Taiwan can meet standard PPAP requirements, so Chapter 3 will make questionnaires to 50 automobile factories and distributors in the world. The main purpose of questionnaires is to compare main differences of PPAP processes between domestic factories and foreign suppliers and this will greatly help on domestic suppliers production in the future. Chapter 4 and 5 describes standard PPAP procedure and discusses correct FMEA and Measurement system actions, and there are also some examples in this chapter. Chapter 6 accords to the questionnaires results in chapter 3 and analysis the main problem existed in domestic suppliers. Due to many differences between domestic suppliers and foreign suppliers, this chapter will also discuss how to improve the existent differences and try to build a correct concept in PPAP form them. Chapter 7 will summarize this thesis and make some suggestions to domestic automobile suppliers. I hope this thesis will contribute domestic fastener industry a little, and there will be no any claims from customers in the future. Future researchers can continue focus on how to practice QS9000 system in domestic factories without heavy investment.