BS 6002-2:2007 PDF

BS 6002-2:2007 describes an acceptance sampling system primarily designed for use under the following conditions: a) where the inspection procedure is to be applied to a continuing series of lots of discrete products all supplied by one producer using one production process; b) where the quality characteristics of the items of product are measurable on a continuous scale; c) where the measurement error is negligible (i.e. with a standard deviation no more than 10% of the corresponding process standard deviation); d) where production is stable (under statistical control) and the quality characteristics are distributed, at least to a close approximation, according to normal distributions; e) where, in the case of multiple quality characteristics, the characteristics are independent, or almost independent, of one another; f) where a contract or standard defines a lower specification limit U, an upper specification limit L, or both on each of the quality characteristics. If there is only one quality characteristic, an item is qualified as conforming if its measured quality characteristic x satisfies the appropriate one of the following inequalities:    1) x W L (i.e. the lower specification limit is not violated);    2) x u U (i.e. the upper specification limit is not violated);    3) x W L and x u U (i.e. neither the lower nor the upper specification limit is violated). If there are two or more, say m, quality characteristics, then, designating the lower and upper limits for the ith quality characteristic by Li and Ui respectively, an item of product is qualified as nonconforming if one or more of its m measured quality characteristics xi fails to satisfy the appropriate one of...