ISO 5725-3:2023

Accuracy (trueness and precision) of measurement methods and results — Part 3: Intermediate precision and alternative designs for collaborative studies

This document provides

a)    a discussion of alternative experimental designs for the determination of trueness and precision measures including reproducibility, repeatability and selected measures of intermediate precision of a standard measurement method, including a review of the circumstances in which their use is necessary or beneficial, and guidance as to the interpretation and application of the resulting estimates, and

b)    worked examples including specific designs and computations.

Each of the alternative designs discussed in this document is intended to address one (or several) of the following issues:

a)    a discussion of the implications of the definitions of intermediate precision measures;

b)    a guidance on the interpretation and application of the estimates of intermediate precision measures in practical situations;

c)    determining reproducibility, repeatability and selected measures of intermediate precision;

d)    improved determination of reproducibility and other measures of precision;