标准编号：ISO 3951-1:2022
中文名称：变量检验用取样程序 第1部分：按合格质量水平（AQL）检索的单一质量特征和单一AQL逐批检验用单一抽样计划规范
英文名称：Sampling procedures for inspection by variables — Part 1: Specification for single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a single quality characteristi
发布日期：2022-08
标准范围
This document specifies single sampling plans for lot-by-lot inspection under the following conditions:
a) where the inspection procedure is applied to a continuing series of lots of discrete products, all supplied by one producer using one production process;
b) where only a single quality characteristic, x, of these products is taken into consideration, which is measurable on a continuous scale;
c) where production is under statistical control and the quality characteristic, x, is distributed according to a normal distribution or a close approximation to the normal distribution;
d) where a contract or standard defines a lower specification limit, L, an upper specification limit, U, or both. An item is qualified as conforming if its measured quality characteristic, x, satisfies as appropriate one of the following inequalities:
1) x ≥ L (i.e. the lower specification limit is not violated);
2) x ≤ U (i.e. the upper specification limit is not violated);
3) x ≥ L and x ≤ U (i.e. neither the lower nor the upper specification limit is violated).
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