ASTM D6674-01(2009)
(Guide)Standard Guide for Proficiency Test Program for Fabrics
Standard Guide for Proficiency Test Program for Fabrics
SIGNIFICANCE AND USE
Proficiency testing is a means of securing estimates of the variability of results obtained by different laboratories testing homogeneous materials taken from batch samples when following procedures prescribed in a specific test method.
For the purpose of this guide, homogeneous materials are considered to be laboratory samples cut from the same batch sample (roll or garment lot) and selected at random for the participant laboratories.
This proficiency test program is to be considered a full-scale interlaboratory test, in which a reasonably large number of laboratories participate by testing a series of materials using one or more operators per laboratory and report the data for analysis.
For the purposes of this guide, Full Scale Laboratory Test is defined in Practice D 2904. This is not to be confused with the full scale testing terminology and definitions which appear in other test methods, such as flammability, that describe the size of the specimens being tested.
The statistical data generated by this practice provide information needed to exhibit participation in a formal proficiency test study.
All data are submitted to the program coordinator at ASTM Headquarters for the preparation and distribution of the proficiency testing program reports. All laboratory data are confidential with no disclosure of lab identity except for each participant's own laboratory. Published reports contain all laboratory test data (coded), statistical analysis of test data, charts plotting test results versus lab code, and other information.
SCOPE
1.1 This guide outlines the Proficiency Test Program for Fabrics. Elements for planning the proficiency test program, selecting the sample fabrics to be used, the testing protocol, and the calculations for the data to be reported are included in this practice.
1.2 The planning of the proficiency test program requires a general knowledge of testing of textile fabrics and statistical principles included in the analysis of the data.
1.3 This guide is designed to meet the quality systems proficiency and competence requirements of participating laboratories. This program is not accredited to any international standard.
1.4 The instructions in this guide follow the logic of full scale laboratory tests as described in Practice D 2904 and Guide E 1301, except with this new guide placing its emphasis on proficiency testing.
1.5 Procedures given in this guide are applicable to methods based on the measurement of discrete measurement data and grades or scores.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D6674 – 01 (Reapproved 2009)
Standard Guide for
Proficiency Test Program for Fabrics
This standard is issued under the fixed designation D6674; 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.
INTRODUCTION
Proficiency testing is the use of interlaboratory test comparisons to determine the performance of
individual laboratories for specific tests and to monitor the consistency and comparability of a
laboratory’s test data.
Participation in proficiency testing programs provides laboratories with an objective means of
assessing and demonstrating the reliability of the data they are producing.Although there are several
types of proficiency testing programs, they all share the common feature of the comparison of test
results obtained by two or more laboratories.
One of the main uses of proficiency testing programs is to assess laboratories’ ability to perform
tests competently. This will involve the preparation of the test specimens, calibrating or validating the
testing equipment, performing the tests and reporting the data.
Bodies assessing the technical competence of testing laboratories normally require or expect
satisfactory participation in proficiency testing as evidence of a laboratory’s ability to produce reliable
test results.
1. Scope 2. Referenced Documents
1.1 This guide outlines the Proficiency Test Program for 2.1 ASTM Standards:
Fabrics. Elements for planning the proficiency test program, D123 Terminology Relating to Textiles
selecting the sample fabrics to be used, the testing protocol, D737 Test Method for Air Permeability of Textile Fabrics
and the calculations for the data to be reported are included in D1230 Test Method for Flammability of Apparel Textiles
this practice. D2261 Test Method for Tearing Strength of Fabrics by the
1.2 The planning of the proficiency test program requires a Tongue (Single Rip) Procedure (Constant-Rate-of-
general knowledge of testing of textile fabrics and statistical Extension Tensile Testing Machine)
principles included in the analysis of the data. D2904 Practice for Interlaboratory Testing of a Textile Test
1.3 This guide is designed to meet the quality systems Method that Produces Normally Distributed Data
proficiencyandcompetencerequirementsofparticipatinglabo- D2906 Practice for Statements on Precision and Bias for
ratories. This program is not accredited to any international Textiles
standard. D3775 Test Method for Warp (End) and Filling (Pick)
1.4 The instructions in this guide follow the logic of full Count of Woven Fabrics
scalelaboratorytestsasdescribedinPracticeD2904andGuide D5034 Test Method for Breaking Strength and Elongation
E1301, except with this new guide placing its emphasis on of Textile Fabrics (Grab Test)
proficiency testing. D5035 Test Method for Breaking Force and Elongation of
1.5 Proceduresgiveninthisguideareapplicabletomethods Textile Fabrics (Strip Method)
based on the measurement of discrete measurement data and D6545 Test Method for Flammability of Textiles Used in
grades or scores. Children’s Sleepwear
1 2
This guide is under the jurisdiction of ASTM Committee D13 on Textiles and For referenced ASTM standards, visit the ASTM website, www.astm.org, or
is the direct responsibility of Subcommittee D13.60 on Fabric Test Methods, contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Specific. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Jan. 15, 2009. Published March 2009. Originally the ASTM website.
approved in 2001. Last previous edition approved in 2001 as D6674–01. DOI: Withdrawn. The last approved version of this historical standard is referenced
10.1520/D6674-01R09. on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6674 – 01 (2009)
E1301 Guide for Proficiency Testing by Interlaboratory 3.2.13 test result, n—a value obtained by applying a given
Comparisons test method, expressed as a single determination or a specified
combination of a number of determinations.
3. Terminology 3.2.14 testing laboratory, n—laboratory that performs tests
(including calibration) (also referred to as “participating labo-
3.1 Fordefinitionsoftextileandstatisticaltermsusedinthis
ratory,” or just “laboratory”).
practice, and discussions of their use, refer to Terminology
D123 and appropriate textbooks on statistics.
4. Significance and Use
3.2 Definitions—The relevant definitions are from Termi-
nology D123, and are the most relevant and applicable being 4.1 Proficiency testing is a means of securing estimates of
quoted for the purposes of this practice. the variability of results obtained by different laboratories
testinghomogeneousmaterialstakenfrombatchsampleswhen
3.2.1 accuracy, n—of a test method, the degree of agree-
ment between the true value of the property being tested (or following procedures prescribed in a specific test method.
4.1.1 For the purpose of this guide, homogeneous materials
accepted standard value) and the average of many observations
made according to the test method, preferably by many are considered to be laboratory samples cut from the same
batch sample (roll or garment lot) and selected at random for
observers. D2906
the participant laboratories.
3.2.2 batch sample, n—the material(s) used for the profi-
ciency test study taken from a common roll or garment lot and 4.2 This proficiency test program is to be considered a
distributed to the participants. full-scale interlaboratory test, in which a reasonably large
3.2.3 bias, n—in statistics, a constant or systematic error in number of laboratories participate by testing a series of
materialsusingoneormoreoperatorsperlaboratoryandreport
test results.
the data for analysis.
3.2.4 calibrate, n—to determine and record the relationship
4.2.1 For the purposes of this guide, Full Scale Laboratory
between a set of standard units of measure and the output of an
Test is defined in Practice D2904. This is not to be confused
instrument or test procedure.
with the full scale testing terminology and definitions which
3.2.5 precision, n—the degree of agreement within a set of
appear in other test methods, such as flammability, that
observations or test results obtained as directed in a method.
describe the size of the specimens being tested.
3.2.5.1 Discussion—The term “precision,” delimited in
4.3 The statistical data generated by this practice provide
various ways, is used to describe different aspects of precision.
information needed to exhibit participation in a formal profi-
This usage was chosen in preference to the use of “repeatabil-
ciency test study.
ity” and “reproducibility.”
4.4 All data are submitted to the program coordinator at
3.2.6 precision, n—under conditions of between-laboratory
ASTM Headquarters for the preparation and distribution of the
precision, the multi-laboratory single sample, single operator-
proficiency testing program reports. All laboratory data are
apparatus-day (within laboratory) precision of a method; the
confidential with no disclosure of lab identity except for each
precision of a set of statistically independent test results all of
participant’s own laboratory. Published reports contain all
which are obtained by testing the same sample of material and
laboratory test data (coded), statistical analysis of test data,
each of which is obtained in a different laboratory by one
charts plotting test results versus lab code, and other informa-
operator using one apparatus to obtain the same number of
tion.
observations by testing randomly drawn specimens over the
shortest practical time interval. For a more detailed definition,
5. Materials to be Used in Study
refer to D2906.
3.2.7 proficiency testing, n—determination of the laboratory
5.1 Mechanical Testing Program—Three types of materials
testing performance by means of interlaboratory comparisons.
aretobeincludedinthestudy.Thematerialsshallbedescribed
3.2.8 program coordinator, n—theperson(s)responsiblefor
as light, medium and heavy as defined by the breaking
management of all logistical issues, data collection, and report
strengths. The materials to be used for this study shall be
preparation.
selected by the Subcommittee D13.93 with assistance from
3.2.9 repeatability, n—in statistics, the distribution of sev-
participant laboratories and pertinent subcommittees. An ac-
eral measurements on the same part by one operator with the
credited laboratory selected by the Subcommittee D13.93 shall
same gage.
act as host and maintain these materials. The host laboratory
3.2.10 reproducibility, n—in statistics, the distribution of
shall not be held responsible for the performance of the test
several measurements on the same part by several operators materials at the participant laboratories.
with the same gage.
5.2 Flammability Test Program—At least seven types of
3.2.11 sample, n—(1) a portion of material which is taken
fabrics are to be available for the study, not all of which will be
for testing or record purposes. (2) a group of specimens used, used at the same time.The materials shall be described by fiber
orofobservationsmade,whichprovideinformationthatcanbe
type, construction type (woven, knit, nonwoven), surface
used for making statistical inferences about the population(s) chara
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