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Rolled throughput yield for parallel processes

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  • #24137

    choochor
    Participant

    HI! how do i calculate the rolled throughput yield for processes which are running in parallel? is RTY = the lowest first time yield (FTY)? thanks

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    #57787

    Remi
    Participant

    Hai Choochor,
    make a process mapping (=flow chart) of the process steps.There is 1 input location (=entry).Put 1.000.000 product(part)s in the process entry. Write down for every process step how many parts (of the 1.000.000) enter that process step (calculate from parallel-split-up) and how many leave the process step (calculated from RTY of that process step). So you go through all the possible process steps from start to end.There isΒ 1 output location (=exit).
    The amount of good products that arrive there is your RTY ppm.
    Remi
    Β 

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