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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Tabular and Graphical Display of Statistics.
A well-developed test method, including a ruggedness test to determine control of test method conditions, is essential. Numerical measures of the variability between such test results provide inverse measures of the precision of the test method. Greater variability implies smaller that is, poorer precision and larger imprecision.
Number of Test Results per Material. For a discussion of bias estimation and the relationships between precision, bias, and accuracy, see Practice E Astj 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 ILS.
Link to Active This link will always route to the current Active version of the standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but asttm not provided as part of the standard.
Calculation of the Statistics. Calculation and Display e619 Statistics. Historical Version s – view previous versions of standard Translated Version s: This practice may be used in obtaining the needed information as simply as possible. The data obtained in the interlaboratory study may indicate, however, that further effort is needed to improve the test method. Glucose in Serum Example.
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 prior to use.
The statistical techniques described in this practice provide adequate information for formulating the precision statement of a astmm method.
Concepts of Test Method Precision. Knowledge of the test method precision is useful in commerce and in technical work when comparing test results against standard values such as specification limits or between data sources different laboratories, instruments, etc.
Critical Values of Consistency Statistics, h and k.
A measure of the degree of agreement among these test results describes satm precision of the test method for that material. This information may then be used to prepare a precision statement in accordance with Practice E Pentosans in Pulp Example.
Spreadsheet for E Calculations. However, when accepted reference values are available qstm the property levels, the test result data obtained according to this practice may be used in estimating the bias of the test method.
Historical Version s – view previous versions of standard. This standard does not purport to address all of the safety concerns, if any, associated with its use.