ASTM C802-14

Standard Practice for Conducting an Interlaboratory Test Program to Determine the Precision of Test Methods for Construction Materials

SIGNIFICANCE AND USE
4.1 This practice provides requirements for planning and conducting an interlaboratory study to obtain data to develop single-operator and multilaboratory precision statements for a test method. It includes methods to evaluate data consistency before carrying out the calculations to develop the precision statement. The procedures are compatible with those in Practice E691.  
4.2 The ILS data obtained from this practice are intended for developing the precision values for writing single-operator and multilaboratory precision statements in accordance with Practice C670.  
4.3 Appendix X1 provides an example to illustrate the calculations to obtain the precision values of the test method from the ILS data. This may be used to check a user-developed electronic spreadsheet for carrying out the calculations.  
4.4 Appendix X2 discusses the additional calculations required for an interlaboratory study of a test method that includes making test specimens as part of the procedure. In this case, batch-to-batch variability needs to be considered.  
4.5 Appendix X3 discusses the use of analysis of variance as an alternative approach to obtain the precision values from the ILS data.
SCOPE
1.1 This practice describes techniques for planning, conducting, and analyzing the results of an interlaboratory study (ILS) with the objective of developing the precision statement of a test method. It is designed to be used in conjunction with Practice C670. The methods used in this standard are consistent with those in Practice E691.  
1.2 This practice is not intended for use in programs whose purpose is to develop a test method or to assess the relative variability of two or more test methods. Refer to Practice C1067 for procedures to evaluate the ruggedness of a test method.  
1.3 The system of units for this practice has not been specified. Dimensional quantities in the practice are presented only in examples of calculations.  
1.4 This standard does not purport to address all 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.

General Information

• Status: Historical
• Publication Date: 14-Dec-2014
• ICS: 91.100.01 - Construction materials in general
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.94 - Evaluation of Data (Joint C09 and C01)

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C802 − 14
Standard Practice for
Conducting an Interlaboratory Test Program to Determine
1
the Precision of Test Methods for Construction Materials
This standard is issued under the fixed designation C802; 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* C136 Test Method for Sieve Analysis of Fine and Coarse
Aggregates
1.1 This practice describes techniques for planning,
C311/C311M Test Methods for Sampling and Testing Fly
conducting, and analyzing the results of an interlaboratory
Ash or Natural Pozzolans for Use in Portland-Cement
study (ILS) with the objective of developing the precision
Concrete
statement of a test method. It is designed to be used in
C670 Practice for Preparing Precision and Bias Statements
conjunction with Practice C670. The methods used in this
for Test Methods for Construction Materials
standard are consistent with those in Practice E691.
C1067 Practice for Conducting a Ruggedness Evaluation or
1.2 This practice is not intended for use in programs whose
Screening Program for Test Methods for Construction
purpose is to develop a test method or to assess the relative
Materials
variability of two or more test methods. Refer to Practice
E105 Guide for Probability Sampling of Materials
C1067 for procedures to evaluate the ruggedness of a test
E177 Practice for Use of the Terms Precision and Bias in
method.
ASTM Test Methods
E178 Practice for Dealing With Outlying Observations
1.3 The system of units for this practice has not been
specified. Dimensional quantities in the practice are presented E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Study to
only in examples of calculations.
Determine the Precision of a Test Method
1.4 This standard does not purport to address all safety
concerns, if any, associated with its use. It is the responsibility
3. Terminology
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
3.1 Definitions:
limitations prior to use.
3.1.1 For definitions of general statistical terms, refer to
1.5 This international standard was developed in accor-
Terminology E456.
dance with internationally recognized principles on standard-
3.1.2 For definitions of terms associated with precision of
ization established in the Decision on Principles for the
test methods for construction materials, refer to Practice C670.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Significance and Use
Barriers to Trade (TBT) Committee.
4.1 This practice provides requirements for planning and
2. Referenced Documents conducting an interlaboratory study to obtain data to develop
2
single-operator and multilaboratory precision statements for a
2.1 ASTM Standards:
test method. It includes methods to evaluate data consistency
C109/C109M Test Method for Compressive Strength of
before carrying out the calculations to develop the precision
Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube
statement. The procedures are compatible with those in Prac-
Specimens)
tice E691.
4.2 The ILS data obtained from this practice are intended
1
This practice is under the jurisdiction of ASTM Committee C09 on Concrete
for developing the precision values for writing single-operator
and ConcreteAggregates.This practice was developed jointly byASTM Committee
C01, C09, D04, and D18, and is endorsed by all four committees.
and multilaboratory precision statements in accordance with
Current edition approved Dec. 15, 2014. Published June 2015. Originally
Practice C670.
approved in 1974. Last previous edition approved in 2009 as C802 – 09A. DOI:
10.1520/C0802-14.
4.3 Appendix X1 provides an example to illustrate the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
calculations to obtain the precision values of the test method
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
from the ILS data.This may be used to check a user-developed
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. electronic spreadsheet for carrying out the calculations.
*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
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C802 − 14
4.4 Appendix X2 discusses the additional calculations re- There should be a reasonable degree of certainty that the
quired
...

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: C802 − 09a C802 − 14
Standard Practice for
Conducting an Interlaboratory Test Program to Determine
1
the Precision of Test Methods for Construction Materials
This standard is issued under the fixed designation C802; 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 techniques for planning, conducting, and analyzing the results of an interlaboratory study of (ILS)
with the objective of developing the precision statement of a test method. It is designed to be used in conjunction with Practice
C670. Thus, the procedures recommended in this practice have the limited purpose of providing reliable information on which
precision statements of the type described The methods used in this standard are consistent with those in Practice C670E691 can
be based. It is not appropriate for use in programs whose purpose is to develop a test method or to assess the relative merits of
two or more test methods.
1.2 This practice is not intended for use in programs whose purpose is to develop a test method or to assess the relative
variability of two or more test methods. Refer to Practice C1067 for procedures to evaluate the ruggedness of a test method.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.system of units for this practice has
not been specified. Dimensional quantities in the practice are presented only in examples of calculations.
1.4 This standard does not purport to address all 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:
C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)
C136 Test Method for Sieve Analysis of Fine and Coarse Aggregates
C311/C311M Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use in Portland-Cement Concrete
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C1067 Practice for Conducting a Ruggedness Evaluation or Screening Program for Test Methods for Construction Materials
E105 Practice for Probability Sampling of Materials
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E178 Practice for Dealing With Outlying Observations
E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions:
3.1.1 For definitions of general statistical terms, refer to Terminology E456.
3.1.2 For definitions of terms associated with precision of test methods for construction materials, refer to Practice C670.
4. Significance and Use
4.1 Certain criteria need to be met before undertakingThis practice provides requirements for planning and conducting an
interlaboratory study to determine the precision of obtain data to develop single-operator and multilaboratory precision statements
1
This practice is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates. This practice was developed jointly by ASTM Committee C01,
C09, D04, and D18, and is endorsed by all four committees.
Current edition approved Dec. 15, 2009Dec. 15, 2014. Published February 2010June 2015. Originally approved in 1974. Last previous edition approved in 2009 as
C802 – 09.C802 – 09A. DOI: 10.1520/C0802-09A.10.1520/C0802-14.
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.
*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

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C802 − 14
for a test method. It is not necessary that all of the following conditions described be completely fulfilled in every case
...