BS PD ISO/TR 21900:2018为可用于评估不确定度来源的一些方法提供了指南。需要注意的是，有许多合法的方法可用于分析整体不确定性，本文件中的方法仅为说明性方法。交叉引用:ISO/TS 10974:2018ISO/IEC指南98-3:2008购买时可用的所有当前修订版均包含在本文件的购买中。

BS PD ISO/TR 21900:2018 provides guidance for some methods that could be used to evaluate the sources of uncertainty. It is important to note that there are many legitimate methods for analyzing the overall uncertainty and that the methods in this document are illustrative only.Cross References:ISO/TS 10974:2018ISO/IEC Guide 98-3:2008All current amendments available at time of purchase are included with the purchase of this document.