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Acceptance Range of CV (Coefficient of Variance)

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  • October 26, 2009 at 11:07 am #52833

    bugtas
    ★ 10 Years ★
    Participant

    Can someone tell me how to set the acceptance range of CV?
    How many % is considered acceptable for a process?

    0
    October 26, 2009 at 12:49 pm #186368

    Darth
    ★ 10 Years ★
    Participant

    Haven’t seen a published standard but I like my s.d. to be about 1/10 of the mean but no real reason other than it feels good.

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    October 26, 2009 at 12:50 pm #186369

    newbie
    ★ 10 Years ★
    Participant

    It is not a measure that falls into a “pass/fail” classification, but is useful due to its relativity to both the process mean, and when used as a comparison measure.  Although I have never found any hard information on this, I have heard a rule of thumb that has worked well for me:  A COV above 10% will point toward potential issues with process variability. Again, ROT.

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    October 26, 2009 at 1:02 pm #186370

    GUSA
    ★ 10 Years ★
    Participant

    Never heard of any such measure , unless you are referring to ‘coefficient of variation’!No laid down acceptance criteria for ‘CV’ . YOu can only use it to compare two processesGUSA

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