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NullWolverine78
NullWolverine78
Level I

SPC Sampling Rate Determination

Oct 18, 2025 03:51 PM (1133 views)
I am trying to determine an appropriate sampling plan for a manufacturing process which has a dimensional in process control (a length). There is a USL and LSL with a target. Cpk and Ppk are both coming in at >2 on a sample size of >2000 units across two mfg. lots.

We sampled at a rate of ~5%. I’m trying to figure out what the minimum sample rate is to ensure quality (95/95 confidence coverage). How do I determine this in jmp?
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