ASTM WK81571
New Guide for Conducting an Interlaboratory Study to determine Precision Estimates for an Acoustics Test Method with Fewer than Six Participating Laboratories
1. Scope
This guide is for conducting Interlaboratory studies of acoustics test methods is situations where there are less than six laboratories available to conduct testing according to the test method. While other standards exist which address this issue in other areas of testing, acoustics testing usually involves a result set over a range of frequencies and a complex classification based on the results over the frequency range.Keywords
Precision and Bias; AcousticsRationale
Many of the test methods in E33 are only performed by a handful of laboratories. Those performing interlaboratory studies to determine precision and bias often need to contend with small numbers of participating laboratories. In addition, the techniques presented in E691 and other related standards assume that each result is completely independent of other results for the same material and that is not strictly true when dealing with results over a range of frequencies. And some of the classification methods used in E33 standards provide a numerical classification that is obtained by a complex curve fitting process. Applying the standard statistical techniques to these classifications, which is often done, may result in misleading precision estimates.
Work Item Status
Date Initiated: 04-19-2022
Technical Contact: Robert Hallman
Item: 000
Ballot:
Status: