27 Apr ASTM E Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method aids in collecting the. 24 Dec This standard is issued under the fixed designation E ; the number . 1 This practice is under the jurisdiction of ASTM Committee E on. 21 Feb “ASTM E–87 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method.” Journal of Quality.

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Pentosans in Pulp Example. For a discussion of bias estimation and the relationships between precision, bias, and accuracy, see Practice E Historical Version s – view previous versions of standard Translated Version s: A measure of the degree of agreement among these test results describes the precision of the test method for that e69. Glucose in Serum Example.

However, when accepted reference values are available for the property levels, the test result data obtained according to this practice may be used in estimating the bias of the test method. Critical Values of Consistency Statistics, h and k.


Calculation of the Statistics. Knowledge of the test method precision is useful in commerce and s691 technical work when comparing test results against standard values such as specification limits or between data sources different laboratories, instruments, etc.

Numerical measures of the variability between such test results provide inverse measures of the precision of the test method.

It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations wstm to use.

This information may then be used to prepare a precision statement in accordance with Practice E This practice may be used in obtaining the needed information as simply as possible. Concepts of Test Method Precision.

Link to Active This link will always route to the current Active version of the standard.

Greater variability implies smaller that is, poorer precision and larger imprecision. In this practice, the term test method is used both for the actual measurement process and for the written description of the process, while the term protocol is used for the directions given to the laboratories for conducting the Atsm.


A well-developed test method, including a ruggedness test to determine control of test method conditions, is essential. Calculation and Display of Statistics.

Spreadsheet for E Calculations. Historical E6911 s – view previous versions of standard. This standard does not purport to address all of the safety concerns, if any, associated with its use.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Number of Test Results per Material.

The data obtained in the interlaboratory study may indicate, however, that further effort is needed to improve the test method. The statistical techniques described in this practice provide adequate information for formulating the precision statement of a xstm method. Tabular and Graphical Display of Statistics.