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Capability Question

Six Sigma – iSixSigma Forums General Forums General Capability Question

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  • #53459

    NewDude
    Participant

    I am looking at DPMO vs. sigma in a certain handbook and it states that DPMO is a more sensitive measure than Yield. Are they not two sides of the same coin? How are they different?

    Or is DPMO referring to defects while Yield is referring to defectives? Hence, the increased sensitivity?

    Thanks!

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    #190199

    Strayer
    Participant

    “Yield” is commonly the ratio of usable (non-defective) units to total units. There can be multiple defects in a single defective so DPMO is more sensitive. That said, DPMO expressed as a percentage is often called “yield”. This is a different definition which is, as you say, “two sides of the same coin”. The ratio of non-defective results to opportunities is useful in process capability calculations but I wish we didn’t call it “yield”.

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    #190201

    the dude
    Member

    Understood. So if I look at a conversion table that lists the equivalents of sigma, yield, DPMO, etc “Yield” in this context is referring to defectives (good output / total output) while DPMO is referring to defects?

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