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Process Capability Analysis Menu

For more on process capability analysis, see the Classroom section.

ARTICLES

> Cpk or Ppk: Which should you use?
> How can Cpk be good with data outside the specification?
> How do we determine process capability if the process isn't normal?
> Is Cpk the best capability index?
> Should you calculate Cpk when your process is not in control?
> The capability index dilemma: Cpk, Ppk, or Cpm
> Calculating capability indices with one specification
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FREQUENTLY-ASKED QUESTIONS

> Are Cpk & Ppk acronyms? If so, what do they actually mean or represent?
> What is the difference between Cp and Pp?
> What is the difference in the formulas for Cpk and Ppk?
> Are there maximum values for Cp, Cpk, Pp and Ppk?
> How can I improve Cpk value, when it is less than 1.0?
> Is it possible to have a Ppk value of 10 and a Pp number of 5?
> What do the letters in Cp and Cpk stand for?
> Why do capability indices formulas divide by 3?
> What is an ideal Cpm value?
> Can I compare two processes based on only the Cpk values of each of them?
> Can the process performance index Ppk be applied on the ongoing process? If yes, how?
> Why would I have Cp and Cpk indices well over 1 when some readings are outside the specification limits?

FREE CAPABILITY CALCULATOR

> Cpk Advisor: Free Cpk calculator and reference materials

If you don't find the answers to your questions about capability in these articles, submit your question on our Forum to be answered by one of the quality experts.