iSixSigma

Pp vs. Cp

Viewing 1 post (of 1 total)
  • Author
    Posts
  • #28883

    Eileen Beachell
    Participant

    Peter,
    Your question is “What does the k stand for?” When you calculate the distance the mean is from the closest specification limit, you use a z-score. That is, you calculate the distance of the average from the spec limit in units of the std. dev. (take the distance and divide by 3-sigma).
    This calculation used to be referred to as a k-value (1950’s?)(later referred to as z). Hence the confusion. Maybe we should start calling it Cz ??
    Eileen Beachell, Quality Disciplines

    0
Viewing 1 post (of 1 total)

The forum ‘General’ is closed to new topics and replies.