GB/T 6379.2-2004
Accuracy(trueness and precision)of measurement methods and results-Part 2:Basic method for the determination of repeatability and reproducibility of a standard measurement method (English Version)

Standard No.

GB/T 6379.2-2004

Language

Chinese, Available in English version

Release Date

2004

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 6379.2-2004

Replace

GB/T 11792-1989 GB/T 6379-1986

Scope

1.1 This part of GB/T 6379—gives some general principles to be followed in the design of experiments to obtain numerical estimates of the precision of measurement methods through collaborative interlaboratory experiments. — provide a detailed and practical description of the basic methods commonly used to estimate the precision of a measurement method. - Guidance for all those concerned with the design, execution, and analysis of results of experiments concerned with estimation of precision. Note 1: The content of some amendments and changes to the basic method for specific purposes is given in other parts of GB/T 6379. Appendix 8 provides some practical examples of experimentally estimating the precision of a measurement method. 1.2 The measurement methods involved in this part of GB/T 6379 specifically refer to the measurement methods that measure continuous quantities and take only one measurement value as the test result each time, although this value may be the calculation result of a group of observation values. 1.3 It is assumed that all the principles given in GB/T 6379.1 have been followed during the design and execution of the precision test. The basic method is to use the same number of test results in each laboratory, and each laboratory analyzes the same level of test samples, that is, to conduct experiments with balanced uniform levels. Basic methods apply to those procedures that are standardized and routinely used in many laboratories. Note 2: Several practical examples are given in the appendix of the standard to illustrate balanced and consistent test results. In one example, there was variation in the number of replicates in the unit (unbalanced design); in another example some data were missing. This is because an experiment with a balanced design may end up being unbalanced. Distant values and outliers are also taken into account. 1.4 The statistical model in Chapter 5 of GB/T 6379.1—2004 is used as the basic model for explaining and analyzing the test results, and it is considered that the test results are approximately subject to normal distribution. 1.5 The basic method for estimating the precision of measurement methods in this part of GB/T 6379 is used in the following situations: a) When the standard deviation of repeatability and reproducibility defined in GB/T 6379.1 needs to be determined; b) When the materials used are homogeneous , or the effect of non-uniformity can be included in the precision value; c) when a balanced uniform level design can be used. 1.6 The same method can be used for preliminary precision estimates for measurement methods that have not been standardized or are not routinely used.

GB/T 6379.2-2004 history

• 2004 GB/T 6379.1-2004 Accuracy(trueness and precision)of measurement methods and results Part 1:General principles and definitions
• 1989 GB/T 11792-1989 Precision of test methods--Check the acceptability of test results obtained under repeatability or reproducibility conditions and to determine final test result
• 1986 GB/T 6379-1986 Precision of test methods--Determination of repeatability and reproducibility for a standard test method by interlaboratory tests

GB/T 6379.2-2004 Accuracy(trueness and precision)of measurement methods and results-Part 2:Basic method for the determination of repeatability and reproducibility of a standard measurement method has been changed from GB/T 11792-1989 Precision of test methods--Check the acceptability of test results obtained under repeatability or reproducibility conditions and to determine final test result.

GB/T 6379.2-2004 Accuracy(trueness and precision)of measurement methods and results-Part 2:Basic method for the determination of repeatability and reproducibility of a standard measurement method has been changed from GB/T 6379-1986 Precision of test methods--Determination of repeatability and reproducibility for a standard test method by interlaboratory tests.

GB/T 6379.2-2004 -All Parts