シックス・シグマ
The first concept of Lean Six Sigma was created in 2001 by a book titled "Leaning into Six Sigma: The Path to Integration of Lean Enterprise and Six Sigma" by Barbara Wheat, Chuck Mills, Mike Carnell. The book was developed as a guide for managers of manufacturing plants on how to combine lean manufacturing and Six Sigma in order to dramatically improve quality and cycle time in the plant. Wheat, Mills, and Carnell narrate the story of a company who was skeptical about implementing Lean Six Sigma, but as a result of doing so was able to successfully improve the quality and efficiency in all aspects of business.