13. DMAIC Model: “I” Is for Improve

What Is the Objective of This Chapter?

The objective of this chapter is to take you through the various steps of the Improve phase of the Six Sigma DMAIC model so that you can apply them on projects at your organization. We use a case study to demonstrate how the steps of each phase are executed in real world projects.

Purpose of the Improve Phase

Let’s go back to our equation CTQ is a function of one or more Xs, or CTQ = f(X1, X2, Xi,....Xn) where:

Image CTQ is a measure of your problematic key indicator.

Image Xi

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