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BS ISO 2859-2:2020

BS ISO 2859-2:2020

$198.66

Sampling procedures for inspection by attributes – Sampling plans indexed by limiting quality (LQ) for isolated lot inspection

Published By Publication Date Number of Pages
BSI 2020 54
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This document specifies an acceptance sampling system for inspection by attributes indexed by limiting quality (LQ). The sampling system is used for lots in isolation (isolated sequences of lots, an isolated lot, a unique lot or a short series of lots), where switching rules, such as those of ISO 2859-1, are not applicable. Inspection levels, as provided by ISO 2859-1 to control the relative amount of inspection, are not provided in this document. In many industrial situations, in which switching rules might be used, they are not applied for a number of reasons, not all of which might be valid:

  1. production is intermittent (not continuous);

  2. production is from several different sources in varying quantities, i.e. “job lots”;

  3. lots are isolated;

  4. lots are resubmitted after inspection.

The sampling plans in this document are indexed by a series of specified values of limiting quality (LQ), where the consumer’s risk (the probability of acceptance at the LQ) is usually below 0,10 (10 %), except in some instances.

This document is intended both for inspection for nonconforming items and for inspection for nonconformities per 100 items.

It is intended to be used when the supplier and the consumer both regard the lot to be in isolation. That is, the lot is unique in that it is the only one of its type produced. It can also be used when there is a series of lots too short for switching rules to be applied.

PDF Catalog

PDF Pages PDF Title
2 undefined
6 Foreword
7 1 Scope
2 Normative references
8 3 Terms and definitions, and symbols and abbreviated terms
3.1 Terms and definitions
9 3.2 Symbols and abbreviated terms
4 Choice of sampling plan
4.1 General
11 4.2 Choice of limiting quality (LQ)
12 4.3 Obtaining a sampling plan
13 5 Acceptance and non-acceptance
5.1 Drawing of samples
5.2 Acceptance of lots
5.3 Disposition of non-accepted lots
5.4 Accepted lots with one or more nonconforming units or nonconformities
5.5 Resubmitted lots
6 Sampling for nonconformities
6.1 Sampling for nonconformities for lots with correlation of the nonconformities
14 6.2 Sampling for nonconformities for lots without correlation of the nonconformities
6.3 General advice on sampling for nonconformities
7 Examples
7.1 Example of sampling for nonconforming items
7.2 Example of sampling for nonconformities for lots with correlation
15 7.3 Example of sampling for nonconformities for lots without correlation
8 Additional information about the tables
8.1 Tables 8 to 15
8.2 Tables 16 and 17
43 Annex A (informative) Statistical properties of single sampling plans
46 Annex B (informative) Calculation of the statistical indices
51 Annex C (informative) Information on technical background of confidence intervals
52 Bibliography

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BS ISO 2859-2:2020
$198.66