ASTM E2653-23
(Practice)Standard Practice for Conducting an Interlaboratory Study to Determine Precision Estimates for a Test Method with Fewer Than Six Participating Laboratories
Standard Practice for Conducting an Interlaboratory Study to Determine Precision Estimates for a Test Method with Fewer Than Six Participating Laboratories
SIGNIFICANCE AND USE
5.1 ASTM regulations require precision statements in all test methods in terms of repeatability and reproducibility. This practice is used when the number of participating laboratories or materials being tested, or both, in a precision study is less than the number specified by Practice E691. When possible, it is strongly recommended that a full Practice E691 standard protocol be followed to determine test method precision. Precision results produced by the procedures presented in this standard will not have the same degree of accuracy as results generated by a full Practice E691 protocol. This procedure will allow for the development of useful precision results when a full complement of laboratories is not available for interlaboratory testing.
5.2 This practice is based on recommendations for interlaboratory studies and data analysis presented in Practice E691. This practice does not concern itself with the development of test methods but with a standard means for gathering information and treating the data needed for developing a precision statement for a test method when a complete Practice E691 interlaboratory study and data analysis are not possible.
SCOPE
1.1 This practice describes the techniques for planning, conducting, analyzing, and treating results of an interlaboratory study (ILS) for estimating the precision of a test method when fewer than six laboratories are available to meet the recommended minimum requirements of Practice E691. Data obtained from an interlaboratory study are useful in identifying variables that require modifications for improving test method performance and precision.
1.2 Precision estimates developed using this practice will not be statistically equivalent to precision estimates produced by Practice E691 because a small number of laboratories are used. The smaller number of participating laboratories will seriously reduce the value of precision estimates reported by this practice. However, under circumstances where only a limited number of laboratories are available to participate in an ILS, precision estimates developed by this practice will provide the user with useful information concerning precision for a test method.
1.3 A minimum of three qualified laboratories is required for conducting an ILS using this practice. If six or more laboratories are available to participate in an ILS for a given test method, Practice E691 shall be used for conducting the ILS.
1.4 Since the primary purpose of this practice is the development of the information needed for a precision statement, the experimental design in this practice will not be optimum for evaluating all materials, test methods, or as a tool for individual laboratory analysis.
1.5 Because of the reduced number of participating laboratories, a Laboratory Monitor shall be used in the ILS. See Guide E2335.
1.6 Field of Application—This practice is concerned with test methods that yield numerical values or a series of numerical values for different properties associated with the test method. The numerical values mentioned above are typically the result of calculations from a set of measurements.
1.7 This practice includes design information suitable for use with the development of interlaboratory studies for test methods that have categorization (go-no-go) allocation test results. However, it does not provide a recommended statistical practice for evaluating the go-no-go data.
1.8 This practice cannot be used to provide quantitative measures.
1.9 This practice is issued under Committee E05, but it is generic in its statistical approach such that it is applicable to any other method.
1.10 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 ...
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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: E2653 − 23 An American National Standard
Standard Practice for
Conducting an Interlaboratory Study to Determine Precision
Estimates for a Test Method with Fewer Than Six
1
Participating Laboratories
This standard is issued under the fixed designation E2653; 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 1.6 Field of Application—This practice is concerned with
test methods that yield numerical values or a series of
1.1 This practice describes the techniques for planning,
numerical values for different properties associated with the
conducting, analyzing, and treating results of an interlaboratory
test method. The numerical values mentioned above are
study (ILS) for estimating the precision of a test method when
typically the result of calculations from a set of measurements.
fewer than six laboratories are available to meet the recom-
1.7 This practice includes design information suitable for
mended minimum requirements of Practice E691. Data ob-
use with the development of interlaboratory studies for test
tained from an interlaboratory study are useful in identifying
methods that have categorization (go-no-go) allocation test
variables that require modifications for improving test method
results. However, it does not provide a recommended statistical
performance and precision.
practice for evaluating the go-no-go data.
1.2 Precision estimates developed using this practice will
1.8 This practice cannot be used to provide quantitative
not be statistically equivalent to precision estimates produced
measures.
by Practice E691 because a small number of laboratories are
used. The smaller number of participating laboratories will
1.9 This practice is issued under Committee E05, but it is
seriously reduce the value of precision estimates reported by
generic in its statistical approach such that it is applicable to
this practice. However, under circumstances where only a
any other method.
limited number of laboratories are available to participate in an
1.10 This standard does not purport to address all of the
ILS, precision estimates developed by this practice will pro-
safety concerns, if any, associated with its use. It is the
vide the user with useful information concerning precision for
responsibility of the user of this standard to establish appro-
a test method.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.3 A minimum of three qualified laboratories is required
1.11 This international standard was developed in accor-
for conducting an ILS using this practice. If six or more
dance with internationally recognized principles on standard-
laboratories are available to participate in an ILS for a given
ization established in the Decision on Principles for the
test method, Practice E691 shall be used for conducting the
Development of International Standards, Guides and Recom-
ILS.
mendations issued by the World Trade Organization Technical
1.4 Since the primary purpose of this practice is the devel-
Barriers to Trade (TBT) Committee.
opment of the information needed for a precision statement, the
experimental design in this practice will not be optimum for
2. Referenced Documents
evaluating all materials, test methods, or as a tool for individual
2
2.1 ASTM Standards:
laboratory analysis.
E176 Terminology of Fire Standards
1.5 Because of the reduced number of participating
E177 Practice for Use of the Terms Precision and Bias in
laboratories, a Laboratory Monitor shall be used in the ILS. See
ASTM Test Methods
Guide E2335.
E178 Practice for Dealing With Outlying Observations
E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Study to
1
This practice is under the jurisdiction of ASTM Committee E05 on Fire
Standards and is the direct responsibility of Subcommittee E05.31 on Terminology
2
and Services / Functions. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved March 1, 2023. Published March 2023. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2008. Last previous edition approved in 2021 as E2653 – 21. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E2653-23. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
...
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: E2653 − 21 E2653 − 23 An American National Standard
Standard Practice for
Conducting an Interlaboratory Study to Determine Precision
Estimates for a Fire Test Method with Fewer Than Six
1
Participating Laboratories
This standard is issued under the fixed designation E2653; 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 describes the techniques for planning, conducting, analyzing, and treating results of an interlaboratory study
(ILS) for estimating the precision of a fire test method when fewer than six laboratories are available to meet the recommended
minimum requirements of Practice E691. Data obtained from an interlaboratory study are useful in identifying variables that
require modifications for improving test method performance and precision.
1.2 Precision estimates developed using this practice will not be statistically equivalent to precision estimates produced by Practice
E691 because a small number of laboratories are used. The smaller number of participating laboratories will seriously reduce the
value of precision estimates reported by this practice. However, under circumstances where only a limited number of laboratories
are available to participate in an ILS, precision estimates developed by this practice will provide the user with useful information
concerning precision for a test method.
1.3 A minimum of three qualified laboratories is required for conducting an ILS using this practice. If six or more laboratories
are available to participate in an ILS for a given fire test method, Practice E691 shall be used for conducting the ILS.
1.4 Since the primary purpose of this practice is the development of the information needed for a precision statement, the
experimental design in this practice will not be optimum for evaluating all materials, test methods, or as a tool for individual
laboratory analysis.
1.5 Because of the reduced number of participating laboratories, a Laboratory Monitor shall be used in the ILS. See Standard
Guide E2335.
1.6 Field of Application—This practice is concerned with test methods that yield numerical values or a series of numerical values
for different fire-test response properties. properties associated with the test method. The numerical values mentioned above are
typically the result of calculations from a set of measurements.
1.7 This practice includes design information suitable for use with the development of interlaboratory studies for test methods that
have categorization (go-no-go) allocation test results. However, it does not provide a recommended statistical practice for
evaluating the go-no-go data.
1
This practice is under the jurisdiction of ASTM Committee E05 on Fire Standards and is the direct responsibility of Subcommittee E05.31 on Terminology and Services
/ Functions.
Current edition approved Dec. 1, 2021March 1, 2023. Published January 2022March 2023. Originally approved in 2008. Last previous edition approved in 20152021 as
E2653E2653 – 21.-15. DOI: 10.1520/E2653-21.10.1520/E2653-23.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E2653 − 23
1.8 This fire standard practice cannot be used to provide quantitative measures.
1.9 This practice is issued under Committee E05, but it is generic in its statistical approach such that it is applicable to any other
method.
1.10 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.
1.11 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:
E176 Terminology of Fire Standards
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E178 Practice for Dealing With Outlying Observations
E456 Terminology Relati
...
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