ISO/TR 21074:2016描述了如何使用化学分析方法确定标准化工作中进行的精密度试验的重复性和再现性。具体而言，本文件以ISO 5725-3:1994表D.2中ISO 9647:1989精度试验的精度试验数据为例，说明了计算精度的程序。 ISO 5725-2和ISO 5725-3中描述了测定精密度的国际试验程序。

ISO/TR 21074:2016 describes how to determine the repeatability and reproducibility of precision tests performed within standardization work using the chemical analysis method. Specifically, this document explains the procedure for calculating precision, using precision test data of ISO 5725 3:1994, Table D.2 for the precision test in ISO 9647:1989 as an example. The procedure of the international test for determining precision is described in ISO 5725 2 and ISO 5725 3.