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ASTM D6607-00(2015)

Current Reaffirmation

Standard Practice for Inclusion of Precision Statement Variation in Specification Limits

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1.1 This practice covers a method of determining rational specification limits by inclusion of the precision of the test method used in the specification.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


4.1 Each test method has a limited precision. Even if a test is performed as carefully and as correctly as possible on a material which is as homogeneous as can be obtained, the test will still vary from one to another. A widely used measure of the variation of the test results from a test method is the standard deviation (σ). In an ASTM standard test, the standard deviation of the test method can be found in the Precision and Bias statement for the test. The “Blue Book,” Form and Style for ASTM Standards, requires that all test methods include Precision and Bias statements. Practice C670 and Practice C802 provide guidance for determination of these values.

4.2 If the precision of a test method is low and the precision of the test has not been properly considered in a material specification, a uniform material with the right quality may still be rejected most of the time because of the wide variation of the test results. In order to have rational specification limits, the precision of the test used should be properly included in a specification.

4.3 This practice provides a guideline for proper inclusion of precision of the test method in a rational specification.

SDO ASTM: ASTM International
Document Number D6607
Publication Date Jan. 1, 2015
Language en - English
Page Count 3
Revision Level 00(2015)
Supercedes
Committee D04.94
Publish Date Document Id Type View
Nov. 1, 2021 D6607-21 Revision
Dec. 10, 2000 D6607-00 Revision
Jan. 1, 2015 D6607-00R15 Reaffirmation
Dec. 1, 2009 D6607-00R09 Reaffirmation
June 1, 2005 D6607-00R05 Reaffirmation