ISO-28598-2 Acceptance sampling procedures based on the allocation of priorities principle (APP) - Part 2: Coordinated single sampling plans for acceptance sampling by attributes


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This part of ISO 28598 provides attributes sampling procedures and single sampling plans for successive independent inspections of the same lot conducted by the supplier, customer and/or a third party.

This part of ISO 28598 addresses:

- supplier inspection (final inspection, product certification upon supplier's request);

- customer inspection (incoming inspection, surveillance, acceptance sampling);

- third party inspection.

This part of ISO 28598 may also be applicable when only one inspection is needed.

A catalogue of single sampling plans is given, indexed by the normative quality limits (NQLs).

This part of ISO 28598 provides sampling procedures for:

- finished product;

- components and discrete items;

- operations;

- discrete items and the processes that produce them;

- data and records.

Attributes sampling procedures are provided for inspection of an isolated lot or a continuing series of lots of a discrete product. These procedures are applicable when a normative quality limit (NQL) is given and expressed in terms of percent nonconforming or nonconformities per 100 items.

This part of ISO 28598 provides a co-ordinated system of supplier, customer and third party acceptance sampling procedures. It is also applicable to the case where a supplier individually, or on agreement with a customer, in a contract, specifies a lot quality criterion expressed in terms of an NQL. In either case, it provides a coherent methodology for designating lots as satisfactory or unsatisfactory for shipment and proposed use.




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Document Number

ISO 28598-2:2017

Revision Level




Publication Date

Oct. 1, 2017

Committee Number

ISO/TC 69/SC 5