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Friday, December 23, 2022

Acceptable PPM Levels

If a customer assembles 20 000 screws per day
and the batch has a PPM value of 500 it means that there
is 10 defect parts in the batch. This causes 10 stops in
the automatic assemblage. If each stop takes 5 minutes
to correct it will take 50 minutes each day to rectify. The
cost will be enormous.