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BS ISO 5725-6:1994:2002 Edition

BS ISO 5725-6:1994:2002 Edition

$198.66

Accuracy (trueness and precision) of measurement methods and results – Use in practice of accuracy values

Published By Publication Date Number of Pages
BSI 2002 58
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1.1 The purpose of this part of ISO 5725 is to give some indications of the way in which accuracy data can be used in various practical situations by:

  1. giving a standard method of calculating the repeatability limit, the reproducibility limit and other limits to be used in examining the test results obtained by a standard measurement method;

  2. providing a way of checking the acceptability of test results obtained under repeatability or reproducibility conditions;

  3. describing how to assess the stability of results within a laboratory over a period of time, and thus providing a method of “quality control” of the operations within that laboratory;

  4. describing how to assess whether a given laboratory is able to use a given standard measurement method in a satisfactory way;

  5. describing how to compare alternative measurement methods.

1.2 This part of ISO 5725 is concerned exclusively with measurement methods which yield measurements on a continuous scale and give a single numerical figure as the result, although this single figure may be the outcome of a calculation from a set of observations.

1.3It is assumed that the estimates of trueness and precision for the method have been obtained in accordance with parts 1 to 5 of ISO 5725.

1.4Any additional information regarding the field of application will be given at the beginning of each particular application.

PDF Catalog

PDF Pages PDF Title
1 BRITISH STANDARD
2 Committees responsible for this British�Standard
3 Contents
9 Introduction
0.1
0.2
0.3
0.4
1 Scope
1.1 The purpose of this part of ISO�5725 is to give some indications of the way in which accuracy…
1.2 This part of ISO�5725 is concerned exclusively with measurement methods which yield measureme…
1.3 It is assumed that the estimates of trueness and precision for the method have been obtained …
1.4 Any additional information regarding the field of application will be given at the beginning …
10 2 Normative references
3 Definitions
4 Determination of limits
4.1 Repeatability and reproducibility limits
11 4.2 Comparisons based on more than two values
13 5 Methods for checking the acceptability of test results and determining the final quoted result
5.1 General
5.2 Methods for checking the acceptability of test results obtained under repeatability conditions
14 Table 1 Critical range factors
15 Figure 1 Method for checking the acceptability of test results, obtained under repeatability�conditions, w…
16 Figure 2 Method for checking the acceptability of test results, obtained under repeatability�conditions, w…
17 Figure 3 Method for checking the acceptability of test results, obtained under repeatability�conditions, w…
18 Figure 4 Method for checking the acceptability of test results, obtained under repeatability�conditions, when
Figure 5 Method for checking the acceptability of test results, obtained under repeatability�conditions, when
19 Figure 6 Method for checking the acceptability of test results, obtained under repeatability�conditions, when
20 5.3 Methods for checking the acceptability of test results obtained under both repeatability and�…
22 Table 2 Values of
6 Method for checking the stability of test results within a laboratory
6.1 Background
23 6.2 Methods for checking stability
24 Table 3 Classification for characteristics of test materials according to their true values and important…
25 Table 4 Factors for computing a range chart
26 Table 5 Control chart data sheet for example 1
27 Figure 7 Range chart for the nickel content
30 Table 6 Control chart data sheet for example 2
32 Table 7 Control chart data sheet for example 3
33 Figure 9 Shewhart control chart
34 Figure 10 Cumulative sum control chart for
35 Figure 11Shewhart control chart for
Figure 12 Cumulative sum control chart for
37 Table 8
38 7 Use of repeatability and reproducibility standard deviations in assessing laboratories
7.1 Assessment method
7.2 Evaluation of the use of a measurement method by a laboratory not previously assessed
40 Table 9 Cement content of concrete
Table 10 Cell means and ranges
42 7.3 Continued assessment of previously approved laboratories
44 Table 11 Alkalinity of water
Table 12 Cell means of
45 Table 13 Cell ranges of
47 8 Comparison of alternative measurement methods
8.1 Origin of alternative measurement methods
8.2 Purpose of comparing measurement methods
8.3 Method B is a candidate for an alternative standard method
48 8.4 Accuracy experiment
50 Table 14
54 8.5 Method B is a candidate for a routine method
56 Annex A (normative)
Symbols and abbreviations used in ISO 5725

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BS ISO 5725-6:1994
$198.66