ASTM D6631-05 - 1.7.2005
 
Significance and Use

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.

The definitions of statistical terms used in this guide are contained in Terminology E 456.

 
1. Scope

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

 
2. Referenced Documents

E456-13a(2022)e1

Standard Terminology Relating to Quality and Statistics (Includes all amendments and changes 4/16/2024).

E691-23

Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

E1345-24

Standard Practice for Reducing the Effect of Variability of Color Measurement by Use of Multiple Measurements

E177-26a

Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods (Includes all amendments and changes 5/14/2026).