SPC with Full Population

Six Sigma – iSixSigma Forums General Forums Tools & Templates SPC with Full Population

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    Lorenzo Veronese

    Hi All,
    in general, the DMAIC methodology is based on tools coming from inferential statistics (Hypothesis testing, ANOVA, etc..)
    I recently came across a situation in a department where there is 100% quality check. QA operators do not collect samples, they check 100% of the products for defects and deliver a full count of the defects on a daily basis.
    How does the application of Statistical Process Control change in this case? Does it still make sense to apply SPC?



    Chris Seider

    Attribute data?

    100% manual inspection? Inspection costs must be VERY low. Rework or waste must be high to warrant 100% inspection. Would love to learn more.

    SPC is a great way to detect shifts in X’s or Y’s.

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