“In this article, I will share what my research has uncovered about the origins of Six Sigma™ and Kaizen, the various meanings of each term, and the scope each approach claims. I will begin, however, with a review of the Quality Model, since both these methods emerged as implementations of the Quality Model or as instruments for accomplishing one or more of its goals. As to the issue of what the proponents say versus what happens in fact, I will try to share that within each section of the comparison, as best I can.”

Excerpt from Raphael L. Vitalo, Ph.D.