ASTM E2653-14
(Practice)Standard Practice for Conducting an Interlaboratory Study to Determine Precision Estimates for a Fire Test Method with Fewer Than Six Participating Laboratories
Standard Practice for Conducting an Interlaboratory Study to Determine Precision Estimates for a Fire 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 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 E691 protocol. This procedure will allow for the development of useful precision results when a full compliment 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 fire test method when a complete 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 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. 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 fire standard cannot be used to provide quantitative measures.
1.9 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.
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Designation: E2653 − 14 AnAmerican 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.Anumber 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,
numericalvaluesfordifferentfire-testresponseproperties.The
conducting,analyzing,andtreatingresultsofaninterlaboratory
numerical values mentioned above are typically the result of
study (ILS) for estimating the precision of a fire test method
calculations from a set of measurements.
when fewer than six laboratories are available to meet the
1.7 This practice includes design information suitable for
recommended minimum requirements of Practice E691. Data
use with the development of interlaboratory studies for test
obtainedfromaninterlaboratorystudyareusefulinidentifying
methods that have categorization (go-no-go) allocation test
variables that require modifications for improving test method
results.However,itdoesnotprovidearecommendedstatistical
performance and precision.
practice for evaluating the go-no-go data.
1.2 Precision estimates developed using this practice will
1.8 Thisfirestandardcannotbeusedtoprovidequantitative
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 standard does not purport to address all of the
seriously reduce the value of precision estimates reported by safety concerns, if any, associated with its use. It is the
this practice. However, under circumstances where only a
responsibility of the user of this standard to establish appro-
limitednumberoflaboratoriesareavailabletoparticipateinan priate safety and health practices and determine the applica-
ILS, precision estimates developed by this practice will pro-
bility of regulatory limitations prior to use.
vide the user with useful information concerning precision for
2. Referenced Documents
a test method.
2
2.1 ASTM Standards:
1.3 A minimum of three qualified laboratories is required
E176Terminology of Fire Standards
for conducting an ILS using this practice. If six or more
E177Practice for Use of the Terms Precision and Bias in
laboratories are available to participate in an ILS for a given
ASTM Test Methods
firetestmethod,PracticeE691shallbeusedforconductingthe
E178Practice for Dealing With Outlying Observations
ILS.
E456Terminology Relating to Quality and Statistics
1.4 Since the primary purpose of this practice is the devel-
E691Practice for Conducting an Interlaboratory Study to
opmentoftheinformationneededforaprecisionstatement,the
Determine the Precision of a Test Method
experimental design in this practice will not be optimum for
E1169Practice for Conducting Ruggedness Tests
evaluatingallmaterials,testmethods,orasatoolforindividual
E2335Guide for Laboratory Monitors
laboratory analysis.
3. Terminology
1.5 Because of the reduced number of participating labora-
3.1 Definitions—For formal definitions of statistical terms,
tories a Laboratory Monitor shall be used in the ILS. See
Standard Guide E2335. seeTerminologyE456.Forformaldefinitionsoffireterms,see
Terminology E176.
3.2 Definitions of Terms Specific to This Standard:
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 Dec. 1, 2014. Published December 2014. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2008. Last previous edition approved in 2009 as E2653-09. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E2653-14. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E2653 − 14
3.2.1 protocol, n—in this practice, directions given to the study, and they shall be selected to reflect the range of
laboratories for conducting the interlaboratory study (ILS). performance of test specimens normally evaluated by the test
method.Aminimumofthreereplicatesshallbetestedforeach
3.2.2 repeatabil
...
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 − 09 E2653 − 14 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. 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 fire standard cannot be used to provide quantitative measures.
1.9 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.
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
1
This practice is under the jurisdiction of ASTM Committee E05 on Fire Standards and is the direct responsibility of Subcommittee E05.15E05.31 on Furnishings and
ContentsTerminology and Services / Functions.
Current edition approved April 1, 2009Dec. 1, 2014. Published May 2009December 2014. Originally approved in 2008. Last previous edition approved in 20082009 as
E2653-08.-09. DOI: 10.1520/E2653-09.10.1520/E2653-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E2653 − 14
E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1169 Practice for Conducting Ruggedness Tests
E2335 Guide for Laboratory Monitors
3. Terminology
3.1 Definitions—For formal definitions of stati
...
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