Eric and all,

        How about tracking the yield through the process/machine over time -
per shift, daily, weekly, whatever makes sense?  Example, I have 95% yield
so I know for every 100 scheduled/produced I can expect, on average, to get
95 good ones to go to the next step.  I can't tell you which ones are good
until I measure/inspect something.

        I think of process capability (or the index), Cp or Cpk, as a means
to compare the ability of a process/machine to produce something within
tolerance.  It tells me whether I will go broke trying to make something.

        Hans

        ~~~~~~~~
        Hans M. Hinners                                 WR-ALC/LYPME Bldg.
640
        Materials Engineer                                      380 Second
Street, Suite 104
        Manufacturing Eng. Sec.                         Robins AFB GA
31098-1638
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>
> What is the best way to determine the process capability of a machine in
> terms of defective units produced? How can I say that a certain machine is
> capable only of producing a certain no of good units everytime it is being
> run? Any inputs will be highly appreciated.
>
> Eric
> FAAI

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