Ormaven · Quality calculator
Pp & Ppk Calculator
Check long-term process performance against specification limits and see which side is limiting Ppk.
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Pp—
Ppk—
Ppu—
Ppl—
Performance signal
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Calculated from the overall variation supplied above.
Who it is for
Quality and manufacturing teams that need a quick long-term performance check from overall process summary statistics.
What you get
Pp, Ppk, upper and lower performance indices, plus a concise explanation of the limiting specification side.
Pp/Ppk normally use overall long-term standard deviation, while Cp/Cpk are typically used with a within-process estimate. Confirm the method required by your customer, study plan or internal standard before comparing results.