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ISO 2859

1st Edition, November 1, 1974

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Sampling procedures and table for inspection by attributes

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Superseded By: ISO 2859-1

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Description / Abstract:

This International Standard specifies sampling plans and procedures for inspection by attributes. When specified by the .responsible authority, this International Standard shall be "referenced" in the specification, contract, inspection instructions, or other documents, and the provisions set forth herein shall govern. The "responsible authority" shall be designated in one of the above documents.

Field of application

Sampling plans designated in this publication are applicable, but not limited, to inspection of the following :

a) end items;

b) components and raw materials;

c) operations;

d) materials in process;

e) supplies in storage;

f) maintenance operations;

g) data or records;

h) administrative procedures

These plans are intended primarily to be used for a continuing series of lots or batches. The plans may also be used for the inspection of isolated lots or batches, but, in this latter case, the user is cautioned to consult the operating characteristic curves to find a plan which will yield the desired protection (see 1 1.6).


Inspection is the process 'of measuring, examining, testing, or otherwise comparing the unit of product (see 1.5) with the requirements.

Inspection by attributes

Inspection by attributes is inspection whereby either the unit of product is classified simply as defective or non-defective, or the number of defects in the unit of product is counted, with respect to a given requirement or set of requirements.

Unit of product

The unit of product is the thing inspected in order to determine i t s classification as defective or non-defective or to count the number of defects. It may be a single article, a pair, a set, a length, an area, an operation, a volume, a component of an end product, or the end product itself. The unit of product may or may not be the same as the unit of purchase, supply, production, or shipment.
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