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Destructive GRR (To do or Not to do?)

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  • #47437

    clouds
    Participant

    Hi,
    I have a case that the measurements of parts will decay after each measurement due to some electrical charging effect, which is an exact destructive GRR case. Can I convince my client that this gauge is not suitable for GRR test, so I dont need to perform GRR?
    Any comment is welcome. Thank u.
    clouds
     

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    #158148

    Chad Taylor
    Participant

    Clouds
    To do an R&R for destructive test you will need to use nested ANOVA to analyze the data. To do an R&R for destructive test you will need 10 batchses and 6 parts per batch or 60 total parts. Random selection of these parts is critical as you want to create a normal look of the process that is representive of the variability in the process. Have 3 appraisers test 2 parts from each batch. Nested ANOVA refers to parts being unique to the operator.
    Chad Taylor
    Chad Taylor

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    #158153

    Anand
    Participant

    While doing Nested Gage R&R you will have to pick up samples which are nearly similar to each other for one set of readings. Like samples from the same length of the bar on whose sections you are going to do a destructive hardness test.

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    #158186

    clouds
    Participant

    Hi Anand, Chad,
    Thanks for the comment. I’ll study Nested ANOVA first then.
    Clouds

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