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Monday, February 4, 2013

Process Capability (Cp, Cpk) and Process Performance (Pp, Ppk) – What is the Difference?

In the Six Sigma quality methodology, process performance is reported to the organization as a sigma level. The higher the sigma level, the better the process is performing.
Another way to report process capability and process performance is through the statistical measurements of Cp, Cpk, Pp, and Ppk. This article will present definitions, interpretations and calculations for Cpk and Ppk though the use of forum quotations.


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