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    ISO 3951-1:2022

    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 characteristic and a single AQL
    • 발행일 : 2022-08-18
    • 발행기관 : ISO
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분야 ISO/TC 69/SC 5 : Acceptance sampling
적용범위

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).

Inequalities 1) and 2) are cases with a single specification limit, and 3) is a case with double specification limits.

Where double specification limits apply, it is assumed in this document that conformity to both specification limits is equally important to the integrity of the product. In such cases, it is appropriate to apply a single AQL to the combined percentage of a product outside the two specification limits. This is referred to as combined control.

국제분류(ICS)코드 03.120.30 : 통계적 방법의 응용
페이지수 107
Edition 3

이력정보

No. 표준번호 표준명 발행일 상태
1 ISO 3951-1:2022상세보기 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 characteristic and a single AQL 2022-08-18 표준
2 ISO 3951-1:2013상세보기 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 characteristic and a single AQL 2013-08-27 구판
3 ISO 3951-1:2005상세보기 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 characteristic and a single AQL 2005-04-07 구판

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