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My process

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  • June 18, 2006 at 10:21 pm #43762

    Fontanilla
    ★ 10 Years ★
    Participant

     
    I am looking at improving a process at my workplace and need some assistance in understanding what I have.  I have a process that resulted in 34 defects over 90,000 opportunities.  This resulted in a sigma of 4.87 according to the sigma calculator on this site.  
    Am I correct in saying this corresponds to approximately 3.1 defects per million?
    Dan
       

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    June 19, 2006 at 1:31 am #139274

    Ken Feldman
    ★ 10 Years ★
    Participant

    Dan, at the top of the calculations you did there was a box entitled DPMO with a value of 378. What do you think this value represents and what does DPMO stand for? Think about it….if you had 34 defects per 90,000 then you might 340 per 900,000 so for 1,000,000 you might have something larger than 340….possibly 378. Make sense?

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    June 19, 2006 at 1:26 pm #139292

    Brit
    ★ 10 Years ★
    Participant

    Basically:
    (34/90,000) x 1,000,000 = 378 DPMO
    You should have seen this figure on the calculator which provides DPMO, Sigma, Defect% and FTY

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    June 19, 2006 at 2:10 pm #139293

    Fontanilla
    ★ 10 Years ★
    Participant

    Thanks for the reply, Brit.  Makes perfect sense.

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