ASTM D4968-17
(Practice)Standard Practice for Annual Review of Test Methods and Specifications for Plastics
Standard Practice for Annual Review of Test Methods and Specifications for Plastics
SIGNIFICANCE AND USE
4.1 It is the intention of this practice, in addition to the Form and Style for ASTM Standards, to assist persons revising test methods and specifications in Committee D20 to ensure that all required elements are included and that the revised document is presented in the most user-friendly manner possible.
4.2 This practice is intended for use by Committee D20 when test methods and specifications under its jurisdiction are revised because of technical changes or upon five-year review.
4.3 The figures in Annex A1 contain three flowcharts. Fig. A1.1 is a flowchart that shows the review process for standards that have been revised or reapproved recently. Fig. A1.2 is a flowchart for standards that have neither been revised nor reapproved within five years of a new review. Fig. A1.3 is a flowchart for the precision and bias process in outline form.
4.4 Specific instructions to be followed when revising Committee D20 documents are given in this practice.
4.5 The model precision and bias (P and B) statements included in Annex A3 were developed to standardize the presentation of data.
SCOPE
1.1 This practice is intended to assist the subcommittees and sections of Committee D20 on Plastics with the process of standards evaluation during the five-year review mandated by ASTM or when changes to test methods and specifications are required. It is intended to complement the Form and Style for ASTM Standards (“Blue Book”) not replace it.
Note 1: There is no known ISO equivalent to this standard.
1.2 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.
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Designation:D4968 −17
Standard Practice for
Annual Review of Test Methods and Specifications for
1
Plastics
This standard is issued under the fixed designation D4968; 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* 3. Terminology
3.1 Definitions—For definitions of terms that appear in this
1.1 Thispracticeisintendedtoassistthesubcommitteesand
practice relating to plastics, refer to Terminology D883.
sections of Committee D20 on Plastics with the process of
standards evaluation during the five-year review mandated by
3.2 For definitions of terms that appear in this practice
ASTM or when changes to test methods and specifications are
relating to quality and statistics, refer to Terminology E456.
required. It is intended to complement the Form and Style for
3.2.1 Repeatability—precision under repeatability condi-
ASTM Standards (“Blue Book”) not replace it.
tions.
3.2.2 Reproducibility—precision under reproducibility con-
NOTE 1—There is no known ISO equivalent to this standard.
ditions.
1.2 This international standard was developed in accor-
3.2.3 Repeatability Limit—the value below which the abso-
dance with internationally recognized principles on standard-
lute difference between two individual test results obtained
ization established in the Decision on Principles for the
under repeatability conditions may be expected to occur with a
Development of International Standards, Guides and Recom-
probability of approximately 0.95 (95 %).
mendations issued by the World Trade Organization Technical
3.2.4 Reproducibility Limit—the value below which the
Barriers to Trade (TBT) Committee.
absolutedifferencebetweentwoindividualtestresultsobtained
underreproducibilityconditionsmaybeexpectedtooccurwith
2. Referenced Documents
a probability of approximately 0.95 (95 %).
2
2.1 ASTM Standards:
3.3 The International Code Council (ICC) has issued guide-
D883 Terminology Relating to Plastics
lines for standards that are appropriate for reference in ICC
D5740 Guide for Writing Material Standards in the Classi-
codes, which include the requirement that they shall be written
fication Format
in mandatory language.
E177 Practice for Use of the Terms Precision and Bias in
3.3.1 In practice, the key issue is to avoid using the terms
ASTM Test Methods
“may” and “should,” except within definitions, appendixes and
E456 Terminology Relating to Quality and Statistics
non-mandatory notes.
E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
4. Significance and Use
E2653 Practice for Conducting an Interlaboratory Study to
4.1 Itistheintentionofthispractice,inadditiontotheForm
Determine Precision Estimates for a Fire Test Method
and Style for ASTM Standards, to assist persons revising test
with Fewer Than Six Participating Laboratories
methodsandspecificationsinCommitteeD20toensurethatall
E2935 Practice for Conducting Equivalence Testing in
required elements are included and that the revised document
Laboratory Applications
is presented in the most user-friendly manner possible.
Form and Style for ASTM Standards (Blue Book)
4.2 This practice is intended for use by Committee D20
when test methods and specifications under its jurisdiction are
1 revised because of technical changes or upon five-year review.
This guide is under the jurisdiction of ASTM Committee D20 on Plastics and
is the direct responsibility of Subcommittee D20.90 on Executive.
4.3 The figures in Annex A1 contain three flowcharts. Fig.
Current edition approved Aug. 1, 2017. Published August 2017. Originally
A1.1 is a flowchart that shows the review process for standards
approved in 1989. Last previous edition approved in 2016 as D4968 - 16. DOI:
10.1520/D4968-17.
that have been revised or reapproved recently. Fig. A1.2 is a
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
flowchart for standards that have neither been revised nor
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
reapproved within five years of a new review. Fig. A1.3 is a
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. flowchart for the precision and bias process in outline form.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D4968−17
4.4 Specific instructions to be followed when revising qualifications for editorial revision, within a five-year period
Committee D20 documents a
...
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: D4968 − 16 D4968 − 17
Standard Practice for
Annual Review of Test Methods and Specifications for
1
Plastics
This standard is issued under the fixed designation D4968; 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 is intended to assist the subcommittees and sections of Committee D20 on Plastics with the process of
standards evaluation during the five-year review mandated by ASTM or when changes to test methods and specifications are
required. It is intended to complement the Form and Style for ASTM Standards (“Blue Book”) not replace it.
NOTE 1—There is no known ISO equivalent to this standard.
1.2 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:
D883 Terminology Relating to Plastics
D5740 Guide for Writing Material Standards in the Classification Format
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E2653 Practice for Conducting an Interlaboratory Study to Determine Precision Estimates for a Fire Test Method with Fewer
Than Six Participating Laboratories
E2935 Practice for Conducting Equivalence Testing in Laboratory Applications
Form and Style for ASTM Standards (Blue Book)
3. Terminology
3.1 Definitions—For definitions of terms that appear in this practice relating to plastics, refer to Terminology D883.
3.2 For definitions of terms that appear in this practice relating to quality and statistics, refer to Terminology E456.
3.2.1 Repeatability—precision under repeatability conditions.
3.2.2 Reproducibility—precision under reproducibility conditions.
3.2.3 Repeatability Limit—the value below which the absolute difference between two individual test results obtained under
repeatability conditions may be expected to occur with a probability of approximately 0.95 (95 %).
3.2.4 Reproducibility Limit—the value below which the absolute difference between two individual test results obtained under
reproducibility conditions may be expected to occur with a probability of approximately 0.95 (95 %).
3.3 Guidelines for terminology in standards that are referenced in model codes issued by either the The International Code
Council (ICC) or the National Fire Protection Association (NFPA) are based on guidance originally provided by one of the regional
model building codes (BOCA) and are given has issued guidelines for standards that are appropriate for reference in ICC codes,
which include the requirement that they shall be written in Appendix X1.mandatory language.
3.3.1 In practice, the key issue is to avoid using the terms “may” and “should,” except within definitions, appendixes and
non-mandatory notes.
1
This guide is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.90 on Executive.
Current edition approved April 1, 2016Aug. 1, 2017. Published April 2016August 2017. Originally approved in 1989. Last previous edition approved in 20152016 as
D4968 - 15.D4968 - 16. DOI: 10.1520/D4968-16.10.1520/D4968-17.
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.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D4968 − 17
4. Significance and Use
4.1 It is the intention of this practice, in addition to the Form and Style for ASTM Standards, to assist persons revising test
methods and specifications in Committee D20 to ensure that all required elements are included and that the revised document is
presented in the most user-friendly manner possible.
4.2 This practice is intended for use by
...
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