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IEC 60410 1st Edition, January 1, 1973
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Sampling plans and procedures for inspection by attributes
Includes all amendments and changes through Change/Amendment , 1973
Additional Comments: BILINGUAL * W/D NO S/S
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This recommendation establishes sampling plans and procedures for inspection by attributes.  When specified by the responsible authority, this recommendation shall be called up 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.

Note. -- The resonsible authority may be the customer.


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 Sub-clause 11.6).


Inspection is the process of measuring, examining, testing or otherwise comparing the unit of product (see Sub-clause 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 its 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.