I have a customer holding me to the AIAG Manual word for word. One of there complaints is my low occurrence ranking but our supplier is only supplying 480 pieces/parts per year. So it got me wondering where does 1 in 1,000,000 come from? Or more clearly, how often does they 1,000,000 occur? There are some companies that manufacturer that quantity of parts of couple months and there are companies that do that every couple years. Or does time not come into this equation? Thanks for your help and time.