BS ISO 5725-1:1994
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Accuracy (trueness and precision) of measurement methods and results General principles and definitions
Hardcopy , PDF
07-24-2023
English
03-15-2000
Committees responsible
National foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Practical implications of the definitions for
accuracy experiments
4.1 Standard measurement method
4.2 Accuracy experiment
4.3 Identical test items
4.4 Short intervals of time
4.5 Participating laboratories
4.6 Observation conditions
5 Statistical model
5.1 Basic model
5.2 Relationship between the basic model and the
precision
5.3 Alternative models
6 Experimental design considerations when estimating
accuracy
6.1 Planning of an accuracy experiment
6.2 Standard measurement method
6.3 Selection of laboratories for the accuracy
experiment
6.4 Selection of materials to be used for an
accuracy experiment
7 Utilization of accuracy data
7.1 Publication of trueness and precision values
7.2 Practical applications of trueness and
precision values
Annex A (normative) Symbols and abbreviations used in
ISO 5725
Annex B (normative) Charts of uncertainties for
precision measures
Annex C (informative) Bibliography
Figure B.1 - The amount by which sr can be expected to
differ from the true value within a
probability level of 95 %
Figure B.2 - The amount by which sR can be expected to
differ from the true value within a
probability level of 95 %
Table 1 - Values showing the uncertainty of estimates
of the repeatability and reproducibility
standard deviations
Table 2 - Values of A, the uncertainty of an estimate
of the bias of the measurement method
Table 3 - Values of AW, the uncertainty of the
within-laboratory bias
Table 4 - Example of method of reporting standard
deviations
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