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Rolled throught yield for a process

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  • #30616

    Ivette
    Participant

    What is the rolled throught yeild for a process with the following infomation (please explain how you came up with the answer):
    Step 1: Yield = .97
    Step 1: Defects = 20
    Step 2: Yield = .94
    Step 2: opportunites = 100
    Step 3: Units = 1

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    #79933

    Kim Niles
    Participant

    Dear Ivette:
    .97 x .94 = .91 = 91% for steps 1 and 2.  The rest is not enough information.
    Does that help?
    KN

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    #79934

    Mike Carnell
    Participant

    Ivette,
    Just checking but you have a two step process with yields of 97% and 94%.
    rty = 91%

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    #80155

    Steve MacDougall
    Member

    Ivette,
    For rolled throughput, all you need to do is multiply each of your individual FPY%’s by each other.  What you have seen in replies to this point is correct.
    So, up to step #3, you have 91% RTP.

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    #80160

    Billybobismyidol
    Participant

    You can also look at it froma DPU perspective if you know defects and opportunities at each step.  Add DPU to get Total DPU.
    RTY = e to minus TDPU

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