Standard Guide for Maintaining Test Methods in the User's Laboratory (Withdrawn 2009)
Standard Guide for Maintaining Test Methods in the User's Laboratory (Withdrawn 2009)D4697-95R01ASTM|D4697-95R01|en-USStandard Guide for Maintaining Test Methods in the User's Laboratory (Withdrawn 2009)StandardD4697 Standard Guide for Maintaining Test Methods in the User's Laboratory (Withdrawn 2009)>newBOS Vol. 07.02 Committee D13
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Significance and Use
Following this guide will aid the user in maintaining control of both the bias and the precision of any test method.
4.1.1 It is necessary to control bias so that, if a change in level of an unknown material under test occurs, the user can be confident that the change was not due to the execution of the test method.
4.1.2 It is also necessary to control precision so that the established confidence limits and critical differences will be maintained.
Should the use of the test method be out of control, this guide will detect it, and may give an indication of where the problem lies.
Scope
1.1 This guide is intended to assist laboratories in maintaining precision and controlling bias in testing. It includes statistical procedures for detecting lack of control, changes in calibration constants, and in operator technique. Suggestions are given for the correction of some out of control situations.
1.2 This guide includes the following topics:
Topic Title
Section
Number
Scope
1
Referenced Documents
2
Terminology
3
Significance and Use
4
Calibration Control
5
Test Performance Control
6
Annexes:
Calibration Control
Annex A1
Test Performance Control
Annex A2
1.3 This standard does not give all of the details for preparing statistical quality control charts or the statistical tests used to interpret them, but such information may be found easily in a number of publications.
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