Six Sigma has long been used as an effective way to restructure a company’s management process. While there are abundant case study literatures on Six Sigma, a theoretical framework that can logically advance the previous work into a higher level is lacked. What’s more, there are few empirical studies to verify those results from previous case studies. To fill these two gaps, this study propose...

Probabilistic design to address uncertainty and variability has been approached from many different angles, by different communities. While reliability methods focus on probability of constraint satisfaction or violation, robust design methods have focused primarily on the level of performance variation, the sensitivity of design objectives. “Six Sigma” quality concepts have arisen more recentl...