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Difference Between Cpk and Ppk

Sarah Jenkins • • 4 min read
Difference Between Cpk and Ppk

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Pp, Ppk vs Cp, CPK

Cp & Cpk use an estimate for the standard deviation using the R Bar / d2 method. Pp, Ppk are more liberal where Cp, CPK are more conservative. Use Pp & Ppk when you are initially setting up your process. Use Cp & Cpk once the process is in a state of statistical control.

Sarah Jenkins
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Sarah Jenkins

Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.