Hi everyone,
The upper management team here uses a DPU metric for our board shop, for what reason I am trying to comprehend. Basically, one solder joint defect on a board equates to the whole board counting as a defect. The opportunities are irrelevant - every board gets one opportunity. When the "PPM" numbers are published, which is what they call them, they are outrageously high. My questions are:
Does anyone use Defects per Unit at the board level?
If so, what kind of numbers are you seeing.?
I am pursuing a change to use real DPMO metrics, but so far I've been unsuccessful. I even presented IPC-7912, but it was ignored. Thanks in advance for the help.
Howard Watson
SMT Manufacturing Engineer
AMETEK/Dixson
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