ASTM D6607-21

Standard Practice for Inclusion of Precision Statement Variation in Specification Limits

SIGNIFICANCE AND 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 method, 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. Practices C670 and 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.
SCOPE
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 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Oct-2021
• ICS: 19.020 - Test conditions and procedures in general
• Technical Committee: D04 - Road and Paving Materials
• Drafting Committee: D04.94 - Statistical Procedures and Evaluation of Data

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:D6607 −21
Standard Practice for
Inclusion of Precision Statement Variation in Specification
1
Limits
This standard is issued under the fixed designation D6607; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D2726/D2726M Test Method for Bulk Specific Gravity and
Density of Non-Absorptive Compacted Asphalt Mixtures
1.1 This practice covers a method of determining rational
E177 Practice for Use of the Terms Precision and Bias in
specification limits by inclusion of the precision of the test
ASTM Test Methods
method used in the specification.
3
2.2 Federal Highway Administration Report:
1.2 The values stated in SI units are to be regarded as
FHWA Report HI-93-047 Materials Control and
standard. No other units of measurement are included in this
Acceptance—Quality Assurance, Federal Highway
standard.
Administration, May 1993
1.3 The text of this standard references notes and footnotes
3. Terminology
which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered 3.1 For definitions of terms used in this practice, consult
as requirements of the standard. Practice E177.
1.4 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 Each test method has a limited precision. Even if a test
responsibility of the user of this standard to establish appro-
is performed as carefully and as correctly as possible on a
priate safety, health, and environmental practices and deter-
material which is as homogeneous as can be obtained, the test
mine the applicability of regulatory limitations prior to use.
will still vary from one to another. A widely used measure of
1.5 This international standard was developed in accor-
the variation of the test results from a test method is the
dance with internationally recognized principles on standard-
standard deviation (σ). In an ASTM standard test method, the
ization established in the Decision on Principles for the
standard deviation of the test method can be found in the
Development of International Standards, Guides and Recom-
Precision and Bias statement for the test. The “Blue Book,”
mendations issued by the World Trade Organization Technical
Form and Style for ASTM Standards, requires that all test
Barriers to Trade (TBT) Committee.
methods include Precision and Bias statements. PracticesC670
2. Referenced Documents and C802 provide guidance for determination of these values.
2
2.1 ASTM Standards:
4.2 If the precision of a test method is low and the precision
C670 Practice for Preparing Precision and Bias Statements of the test has not been properly considered in a material
for Test Methods for Construction Materials
specification,auniformmaterialwiththerightqualitymaystill
C802 Practice for Conducting an Interlaboratory Test Pro- be rejected most of the time because of the wide variation of
gram to Determine the Precision of Test Methods for
thetestresults.Inordertohaverationalspecificationlimits,the
Construction Materials precision of the test used should be properly included in a
D2172/D2172M TestMethodsforQuantitativeExtractionof
specification.
Asphalt Binder from Asphalt Mixtures
4.3 This practice provides a guideline for proper inclusion
of precision of the test method in a rational specification.
1
This practice is under the jurisdiction of Committee D04 on Road and Paving
5. Procedure
Materials and is the direct responsibility of Subcommittee D04.94 on Statistical
Procedures and Evaluation of Data.
5.1 Determine the effective standard deviation (σ)ofthe
x
Current edition approved Nov. 1, 2021. Published November 2021. Originally
test results due to the combined effects of materials variation
approved in 2000. Last previous edition approved in 2015 as D6607 – 00 (2015).
DOI: 10.1520/D6607-21.
and test variation using Eq 1:
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from National Technical Information Service (NTIS), U.S. Depart-
the ASTM website. ment of Commerce, 5285 Port Royal Rd., Springfield, VA 22161.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ---------
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D6607 − 00 (Reapproved 2015) D6607 − 21
Standard Practice for
Inclusion of Precision Statement Variation in Specification
1
Limits
This standard is issued under the fixed designation D6607; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
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.The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard.
1.4 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C802 Practice for Conducting an Interlaboratory Test Program to Determine the Precision of Test Methods for Construction
Materials
D2172D2172/D2172M Test Methods for Quantitative Extraction of Asphalt Binder from Asphalt Mixtures
D2726D2726/D2726M Test Method for Bulk Specific Gravity and Density of Non-Absorptive Compacted Asphalt Mixtures
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
3
2.2 Federal Highway Administration Report:
FHWA Report HI-93–047HI-93-047 Materials Control and Acceptance—Quality Assurance, Federal Highway Administration,
May 1993
1
This practice is under the jurisdiction of Committee D04 on Road and Paving Materials and is the direct responsibility of Subcommittee D04.94 on Statistical Procedures
and Evaluation of Data.
Current edition approved Jan. 1, 2015Nov. 1, 2021. Published February 2015November 2021. Originally approved in 2000. Last previous edition approved in 20092015
as D6607 – 00 (2009).(2015). DOI: 10.1520/D6607-00R15.10.1520/D6607-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from National Technical Information Service (NTIS), U.S. Department of Commerce, 5285 Port Royal Rd., Springfield, VA 22161.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6607 − 21
3. Terminology
3.1 For definitions of terms used in this practice, consult Practice E177.
4. Significance and 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, test method, 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. PracticePractices 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
...