Chapter 3
What Is Six Sigma?
In This Chapter
♦ Improving processes and organizations
♦ You can’t see it but it’s there
♦ Six Sigma’s roots are deep
♦ Underlying concepts are critical
♦ The Six Sigma breakthrough strategy
This chapter will give you a straight-out definition of Six Sigma, and will elaborate on that definition just enough to make you dangerous. We’ll also tell you where Six Sigma came from and why it exists. (Preview: to eliminate defects!) We’ll summarize the Six Sigma problem-solving methodology known around the world as DMAIC (for Define-Measure-Analyze-Improve-Control).
Also in this chapter, we’ll briefly introduce the key principles that underlie Six Sigma. You may have heard the phrase “Y is a function of x.” This is the central ...

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