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Capability Analysis after Box-Cox

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  • #46540

    Grzegorz
    Participant

    When data are not follow normal distribution Capability Analysis we are using Box-Cox Transformation before to catch the lambda parameter.After Box-Cox Transformation we can’t use historical mean. Why?
    Can we use transformed data (after Box-Cox Transformation) instead of collected data without using Box-Cox option during Capability Analysis?

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    #154024

    Maciek
    Participant

    You can’t use historical mean because during transformation Box-Cox your data are modified by mathematical transformation. During Box-Cox tranformation you need to transform your USL and LSL as well. I hope its helps..

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