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6. Process or Product Monitoring and Control
6.1. Introduction

6.1.5.

What to do if "In Control" but Unacceptable?

"In Control" only means that the process is predictable in a statistical sense. What do you do if the process is “in control” but the average level is too high or too low or the variability is unacceptable? 

Process improvement techniques such as

can be initiated to put the process on target or reduce the variability. 

Note that the process must be stable before it can be centered around a target value or its overall variation can be reduced.

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