This standard illustrates the testing procedure to be used to verify the correspondence of a product batch to the technical supply conditions in relation to a property expressed as variables. The test is based on the estimate of the average made from a sample and on the comparison of the characteristic value (see 1.3) with the limit or limits of the specification tolerance (see 2.1).
UNI 7680-1977 history
1977UNI 7680-1977 Statistical methods are used for quality inspection. Statistical acceptance procedure for variables based on eigenvalues