Understanding the Bell Curve

Six Sigma – iSixSigma Forums Old Forums Software/IT Understanding the Bell Curve

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    Ken C.

    I am learning about six-sigma.  In a recent interview I was asked to show the bell curve of six sigma and a standard four sigma curve as illustrated in the article subject.  Could someone please identify the vertical axis of the bell curve and the left and right x-axis of the curves.  Also, where do CPK’s show up in this curve?  I know CPK of 1.33 or greater shows process control for 4-sigma.  What is a good C.P.K. for 6 sigma?



    4 sigma – 1.33
    5 sigma – 1.66
    6 sigma – 2
    hope that helps…

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