So says a friend of mine who has written two books on Six Sigma and for a few years was consulting full time in QC. He told me: "At its core, Six Sigma is a se

So says a friend of mine who has written two books on Six Sigma and for a few years was consulting full time in QC. He told me: "At its core, Six Sigma is a set of very old, well established tools encased in a slick marketing shell. There is nothing revolutionary. Inevitably, Six Sigma fades away and something new will take its place, using the same old tools."