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#### santiko

im new in this forum. already read a lot of topic in this forum, but this my first post.

currently i have a bit a problem in my surveillance sampling frequency.

I have a surveillance sampling frequency with

**1 PCS PER SIZE every 15.000 PCS PER SIZE production or 1 PCS a Year PER SIZE**. This is the old standard and did not have any

**statistical calculation**to explain where the number come from (ISO/TS 16949). Now, i need to find out with the correct way.

Another information is the yearly production is around 9.000.000 PCS a year with random quantity per size (posible 0) and we have about 2.000 unique size. This is destructive test and cost a lot.

I have result data from previous surveillance for each size, but not much, only 5-10 data. But my idea is using as familiy size to get larger data.

The problem is,

What kind of statistical calculation approach to determine the correct surveillance sampling frequency with this case? I'm looking for the direct formulas or method to do.

I hope everyone that have an experience can help.

Thank you.

San.

P.S sorry for bad english.