NF EN ISO 18391
NF EN ISO 18391

NF EN ISO 18391

December 2016
Standard Current

Geometrical product specifications (GPS) - Population specification

ISO 18391:2016 defines rules to establish and to indicate population specifications, which are used to specify conditions on population characteristics, which are established from a set of characteristic values obtained one on each workpiece of a population of workpieces.A population specification (as applied to a population of workpieces considered as a collection and not as individual items) can be seen as a complementary requirement to the individual specification (as applied to each workpiece considered as individual items). Population specifications express the statistical hypotheses used on the population of workpieces.NOTE 1 A population specification is a complement to an individual GPS specification.NOTE 2 ISO 18391:2016 is not intended to mandate a given tolerancing method or how to calculate tolerance values. Its intent is to specify tools to allow the expression of population specifications.

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Main informations

Collections

National standards and national normative documents

Publication date

December 2016

Number of pages

26 p.

Reference

NF EN ISO 18391

ICS Codes

17.040.01   Linear and angular measurements in general
17.040.40   Geometrical Product Specification (GPS)

Classification index

E04-573

Print number

1

International kinship

ISO 18391:2016

European kinship

EN ISO 18391:2016
Sumary
Geometrical product specifications (GPS) - Population specification

ISO 18391:2016 defines rules to establish and to indicate population specifications, which are used to specify conditions on population characteristics, which are established from a set of characteristic values obtained one on each workpiece of a population of workpieces.

A population specification (as applied to a population of workpieces considered as a collection and not as individual items) can be seen as a complementary requirement to the individual specification (as applied to each workpiece considered as individual items). Population specifications express the statistical hypotheses used on the population of workpieces.

NOTE 1 A population specification is a complement to an individual GPS specification.

NOTE 2 ISO 18391:2016 is not intended to mandate a given tolerancing method or how to calculate tolerance values. Its intent is to specify tools to allow the expression of population specifications.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Règles applicables à l'établissement d'une spécification de population
  • 5 Symbole utilisé pour spécifier une spécification de population
  • 6 Règles applicables à l'indication d'une spécification de population
  • Annexe A Relation avec le modèle de matrice GPS
  • Bibliographie
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