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I am posting this somewhat off-centered question to see if anyone else has dealt with this. We are analyzing returned units (retail consumer products) for the purpose of determining failure modes and relaying that information back up to the manufacturing process.
My question is: what sample size would be appropriate to have a sufficient confidence level (~95%) that the defects found represent the population? Can I use the same methodology as acceptace sampling of good product?
Thanks in advance for any comments!
My question is: what sample size would be appropriate to have a sufficient confidence level (~95%) that the defects found represent the population? Can I use the same methodology as acceptace sampling of good product?
Thanks in advance for any comments!