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STANDARD 3951-6
First edition
2023-11
Sampling procedures for inspection by
variables —
Part 6:
Specification for single sampling plans
for isolated lot inspection indexed by
limiting quality (LQ)
Règles d’échantillonnage pour les contrôles par mesures —
Partie 6: Spécification pour les plans d’échantillonnage simples pour
les contrôles de lots isolés, indexés d’après la qualité limite (QL)
Reference number
ISO 3951-6:2023(E)
© ISO 2023
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ISO 3951-6:2023(E)
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Published in Switzerland
ii
© ISO 2023 – All rights reserved
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ISO 3951-6:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols . 6
5 Choice of a sampling plan . 7
5.1 Choice between variables and attributes . 7
5.2 General . 7
5.3 Choice between the s-method and the σ-method . 8
5.4 Choice of the limiting quality (LQ) . 8
6 Standard procedures for the s-method. 9
6.1 General . 9
6.2 Single specification limits . . 9
6.3 Double specification limits . 9
7 Standard procedures for the σ-method .10
7.1 General . 10
7.2 Single specification limits . . 10
7.3 Double specification limits
...