![]() Here is an example of a curve for a plan n = 89 and c = 2. Where P( d défectueux) = P (d defective). The number of defectives in a random sample of size (n) follows a binomial statistical distribution with parameters n and p (proportion of defectives in the lot). These curves show the probability that a batch with a certain proportion of defects will be accepted or refused. ![]() There are operating characteristic curves to measure the performance of a sampling plan. ![]() In a simple plan, only one sample is analyzed per batch. It is an audit tool.Ī simple sampling plan is defined by the sample size and the acceptability criterion. The purpose of a sampling plan is therefore to Accept or Reject a lot. Then, based on the results, a decision is made whether or not the batch is acceptable based on an agreed AQL.
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