Chapter 3

Examining the Principles and Language of Six Sigma

In This Chapter

Mastering the basic equation of Six Sigma: Y = f(X) + ε

Recognizing that determinism and variation affect your outputs

Examining the role of measurement in managing processes

Becoming aware of the power of leverage

Balancing risk with precision of outcomes

Like all grand constructions, Six Sigma sits upon a solid foundation. Beneath all the charts, experiments, projects, colored belts, and catchy phrases lie a few fundamental principles that guide and define the whole Six Sigma methodology.

In this chapter, you discover the one fundamental equation and five basic principles that comprise Six Sigma’s foundation; in doing so, you begin to think the Six Sigma way.

Starting Out with One Simple Equation: Y = f(X) + ε

All of Six Sigma can be summarized with what’s called the breakthrough equation — one general-purpose equation that shouldn’t intimidate even the least mathematically inclined: Y = f(X) + ε, where ...

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