Standards Development

Scope

1.1 This document gives some indications of how accuracy data, including trueness and precision data, can be used in various practical situations by:

a) giving a standard method of calculating the repeatability limit, the reproducibility limit, and other limits to be used in examining the test results obtained by a standard measurement method;

b) providing a way of checking the acceptability of test results obtained under repeatability or reproducibility conditions;

c) describing how to assess the stability of results within a laboratory over a period of time, and thus providing a method of "quality control" of the operations within that laboratory;

d) describing how to assess whether a given laboratory can use a given standard measurement method satisfactorily;

e) describing how to compare alternative measurement methods.

1.2 This document is concerned exclusively with measurement methods which yield measurements on a continuous scale and give a single numerical figure as a result. This single figure may be the outcome of a calculation from a set of observations.

NOTE 1 It is assumed that the estimates of trueness and precision for the method have been obtained in accordance with parts 1 to 5 of ISO 5725.

NOTE 2 Any additional information regarding the field of application will be given at the beginning of each particular application.