3.1 The purpose of an interlaboratory evaluation, as defined in this guide, is to determine the variability of results obtained in different laboratories on equivalent equipment using a prescribed test method.

3.2 The definitions of statistical terms used in this guide are contained in Terminology E456.

1.1 This guide covers a simplified statistical procedure for planning and conducting interlaboratory evaluations of test methods.

1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.