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Cpk to Sigma

Six Sigma – iSixSigma Forums Old Forums General Cpk to Sigma

This topic contains 1 reply, has 2 voices, and was last updated by  Prabhu 13 years, 5 months ago.

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  • #41316

    AT
    Participant

    While I have used sigma charts to convert from Cp to sigma, I am yet to see one which can convert Cpk to sigma level. What’s the way to go?

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    #129387

    Prabhu
    Participant

    To calculate Z value i.e. short term Sigma multiple of the process. We just have to do following calculations :-
    Z st = 3 * Cpk
    and Cpk = Minimum  ( Cpu , Cpl)
    Cpu= (USL-Y)/(3*Sst)
    Cpk=(LSL-Y)/(3*Sst)

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