Sampling inspection sampling inspection is also known, from a number of products in a random sample of a product ( samples ) for inspection, to judge the batch of products are qualified to statistical methods and theory. It and a comprehensive inspection of difference, is that the latter takes on the entire batch of product one by one test, the unqualified goods out, while the sampling inspection according to the product in the sample test results to infer the entire batch of product quality. If the inferred results that the product conforms to a predetermined standard, will be to receive or reject. So, after sampling inspection that qualified in a batch of products, may also contain some unqualified products.