COQ math model case study for self-brand automobile industry

With continues quality improvement program (QIP) implemented in self-brand automotive firms, the quality-related cost need to be identified correspondingly. Quality cost math model provides the possibility for research on trade-off between quality level and quality cost. The R/1000@3MIS index is selected as quality performance representative via Pearson coefficient within warranty period, related cost has been interviewed as well. Practical information, a self-brand automotive firm, has been investigated to test the typical four COQ models with regression analysis via curve fitting process. The results verify that all the four COQ models show their excellent performance, which show the optimal quality level and correct implementation on CQIP.