ASTM E691

Full Name

ASTM E691 – Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

Scope

This practice describes the techniques for planning, conducting, analyzing, and treating the results of an interlaboratory study (ILS) of a test method. The statistical techniques described in this practice provide adequate information for formulating the precision statement of a test method.

This practice does not concern itself with the development of test methods but rather with gathering the information needed for a test method precision statement after the development stage has been successfully completed. The data obtained in the interlaboratory study may indicate, however, that further effort is needed to improve the test method.

Keywords

test method precision; interlaboratory study

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