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ASTM International, 04/01/2014
Publisher: ASTM
File Format: PDF
$43.00$86.00
Published:01/04/2014
Pages:21
File Size:1 file , 230 KB
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1.1 This practice describes the techniques for planning, conducting, analyzing, and treating the results of an interlaboratory study (ILS) of a test method. The statistical techniques described in this practice provide adequate information for formulating the precision statement of a test method.
1.2 This practice does not concern itself with the development of test methods but rather with gathering the information needed for a test method precision statement after the development stage has been successfully completed. The data obtained in the interlaboratory study may indicate, however, that further effort is needed to improve the test method.
1.3 Since the primary purpose of this practice is the development of the information needed for a precision statement, the experimental design in this practice may not be optimum for evaluating materials, apparatus, or individual laboratories.
1.4 Field of Application-This practice is concerned exclusively with test methods which yield a single numerical figure as the test result, although the single figure may be the outcome of a calculation from a set of measurements.
1.4.1 This practice does not cover methods in which the measurement is a categorization; however, for many practical purposes categorical outcomes can be scored, such as zero-one scoring for binary measurements or as integers, ranks for example, for well-ordered categories and then the test result can be defined as an average, or other summary statistic, of several individual scores.
1.5 The information in this practice is arranged as follows:
Section
Scope
1
Referenced Documents
2
Terminology
3
Summary of Practice
4
Significance and Use
5
Planning the Interlaboratory Study (ILS)
ILS Membership
6
Basic Design
7
Test Method
8
Laboratories
9
Materials
10
Number of Test Results per Material
11
Protocol
12
Conducting the Testing Phase of the ILS
Pilot Run
13
Full Scale Run
14
Calculation and Display of Statistics
Calculation of the Statistics
15
Tabular and Graphical Display of Statistics
16
Data Consistency
Flagging Inconsistent Results
17
Investigation
18
Task Group Actions
19
Glucose ILS Consistency
20
Precision Statement Information
Repeatability and Reproducibility
21
Appendixes
Appendix
Theoretical Considerations
X1
Pentosans in Pulp Example
X2
References
Tables and Figures
Table
Glucose in Serum Example
1-4, 6-8
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Standard Specification for High-Flash Aromatic Naphthas
$26.00 $52.00
Standard Test Method for Evaluation of Transparent Plastics Exposed to Accelerated Weathering Combined with Biaxial Stress
$25.00 $50.00
Standard Practice for Quality of Wood Members of Containers and Pallets
$30.00 $60.00
Standard Test Method for Shear Testing of Aluminum Alloys
$32.00 $64.00
