BS EN ISO 18391:2016定义了建立和指示总体规范的规则，其中 用于指定由一组 在一组工件的每个工件上获得一个特征值。总体规格（适用于被视为集合和 不作为单个项目）可被视为单个规范的补充要求 （适用于被视为单个项目的每个工件）。 人口规格表示 用于工件总体的统计假设。注1:总体规范是对单个GPS规范的补充。注2:本国际标准无意规定给定的公差方法或计算方法 公差值。其目的是指定允许表达总体规格的工具。交叉引用:ISO 1101ISO 14405-1ISO 17450-1ISO 3534ISO 8015ISO 14253-1ISO 14638ISO/TS 17863ISO 22514-1购买本文件时提供的所有现行修订版均包含在购买本文件中。

BS EN 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 This International Standard 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.Cross References:ISO 1101ISO 14405-1ISO 17450-1ISO 3534ISO 8015ISO 14253-1ISO 14638ISO/TS 17863ISO 22514-1All current amendments available at time of purchase are included with the purchase of this document.