Tightened, Reduced and Investigational Sampling
Tightened sampling involves the use of more frequent sampling and/or more stringent sampling plans than normal and is implemented when evidence suggests an increased likelihood of a hazard. Reduced sampling involves less frequent sampling, fewer samples, or smaller sample sizes than normal, and is implemented when the risk of a particular process or product is considered to be low. Investigational sampling consists of sampling to determine the direct and underlying causes of a problem.
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