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Capability Analysis

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  • #30715

    Ry
    Member

    How do compute Cp, if there is only one specification limit.  In my exmaple, I need to be running at least 50 minutes every hour, so my lsl is 50.  Do I use 60 as a usl? or is there some other calculation method?
    Thanks, Ry

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    #80393

    Withheld
    Member

    Consider CpL. (average-LSL)/3s

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    #80636

    rams
    Participant

    Some references state that for one-sided spec, Cp=Cpk. Some references state it does not exist. I prefer the second since Cp measures how potentially you are capable of meeting requirements, and requirements refer to your specification range (only applies to 2 sided spec).
    rams

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    #80654

    Ron
    Member

    The most common method is to simply use the USL or the LSL whichever is applicable.

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