ASTM-E691:2005 Edition

$58.50

E691-05 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

Published By	Publication Date	Number of Pages
ASTM	2005	23

Guaranteed Safe Checkout

Category: ASTM

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

ASTM E691-05

Historical Standard: Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

ASTM E691

Scope

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.

1.1.1 A computer software package for performing the calculations and producing the tables and graphs associated with Practice E 691. This software can be run on PC compatible computers, and hard copy tables and graphs can be printed on dot-matrix printers.

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, such as a go-no-go allocation (two categories) or a sorting scheme into two or more categories. For practical purposes, the discontinuous nature of measurements of these types may be ignored when a test result is defined as an average of several individual measurements. Then, this practice may be applicable, but caution is required and a statistician should be consulted.

1.5 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems 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.

Keywords

precision; repeatability; reproducibility; repeatability limit; reproducibility limit

ICS Code

ICS Number Code 19.020 (Test conditions and procedures in general)

DOI: 10.1520/E0691-05

PDF Catalog

PDF Pages	PDF Title
2	Scope Referenced Documents
3	Terminology Summary of Practice Significance and Use
4	ILS Membership Basic Design Test Method
5	Laboratories Materials TABLE 1
6	Number of Test Results per Material Protocol
7	Pilot Run Full Scale Run Calculation of the Statistics
8	TABLE 2
9	Tabular and Graphical Display of Statistics Flagging Inconsistent Results TABLE 3
10	Investigation Task Group Actions Examples of Interlaboratory Studies TABLE 4
11	FIG. 1
12	Repeatability and Reproducibility FIG. 2
13	Keywords FIG. 3
14	FIG. 4
15	TABLE 5 TABLE 6 TABLE 7
16	FIG. 5
17	FIG. 6
18	FIG. 7 TABLE 9 TABLE 10
19	FIG. 8 FIG. 9
20	TABLE 8 TABLE 12 TABLE 11
21	X1. THEORETICAL CONSIDERATIONS X1.1 Underlying Assumptions of ILS X1.2 Consistency Statistics
22	X2. INDEX TO SELECTED TERMS REFERENCES

Additional information

Standard Title	E691-05 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
Published Code	ASTM
Publication Date	2005
Pages Count	23