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What Is the DPMO for This Process?

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This topic contains 6 replies, has 4 voices, and was last updated by  Michael Cyger 8 months, 1 week ago.

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  • #236133

    guptaneeraj8888
    Participant

    Consider a company that provides two services using the same basic process. Service A is relatively complex, and can be defective in 15 different ways. Service B is relatively simple, with only 5 possible defects. The company produces 500 units of A and 1000 units of B. A total of 10 defects are experienced in product A and 17 defects are experienced in product B. What is the DPMO (Defects Per Million Opportunities) for the overall process?

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    #236134

    Aaron Olson
    Participant

    I’m assuming this is a homework question so I’ll point you to a place where you can do some learning – I’d take a look at the following definition that can be found on this website:

    https://www.isixsigma.com/dictionary/defects-per-million-opportunities-dpmo/

    It lays out the formula pretty well.

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    #236136

    Katie Barry
    Keymaster

    @guptaneeraj8888 It appears that this is a homework problem.

    What do YOU think you should do? Why or why not? The iSixSigma audience is helpful, but they like to see that someone is putting forth a good-faith effort. They aren’t here to do your homework for you.

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    #236137

    guptaneeraj8888
    Participant

    I tried but got confused with the defectives. Following is the steps which I have done:
    For servivce A:
    DPMO:10/(500*15)*1000000= 1333.33

    For Service B:
    DPMO: 17/(1000*5)*1000000=3400

    For overall process: 1333.33+3400=4733.33

    Please suggest am I doing it right.
    PS: This a practice test question and I got stuck because it answer is
    2160.

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    #236138

    Aaron Olson
    Participant

    I’d take a look back at the question. It’s asking for the average DPMO for the OVERALL PROCESS. Would you calculate it any differently for the total process?

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    #236140

    guptaneeraj8888
    Participant

    Gotcha!!!
    For overall process DPMO : 10+17/[(500*15) + (1000*5)] *1000000 = 27/12500 *1000000 = .00216* 1000000 =2160.

    Thanks Aaron.
    Will asking for further doubt ;-)

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    #236150

    Michael Cyger
    Keymaster

    Well done, @guptaneeraj8888. :)

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