GB/T 6379.6-2009 English PDF (GBT6379.6-2009)

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GB/T 6379.6-2009: Accuracy (trueness and precision) of measurement methods and results -- Part 6: Use in practice of accuracy values
GB/T 6379.6-2009
Accuracy (trueness and precision) of measurement methods and results.Part 6. Use in practice of accuracy values
ICS 03.120.30
A41
National Standards of People's Republic of China
GB/T 6379.6-2009/ISO 5725-6.1994
Measurement method and accuracy of results
(correctness and precision)
Part 6. Practical application of accuracy values
(ISO 5725-6.1994, IDT)
Released on.2009-03-13
2009-09-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Content
Foreword I
Introduction II
1 range 1
2 Normative references 1
3 Terms and Definitions 2
4 limit determination 2
4.1 Repeatability and Reproducibility Limit 2
4.2 Comparison based on more than two values 2
5 Methods for checking the acceptability of test results and determining the final report results 3
5.1 General 3
5.2 Acceptable test results for test results obtained under repetitive conditions 4
5.3 Acceptable test results for test results obtained under reproducible conditions 9
6 Method for checking the stability of test results in laboratory room 10
6.1 Background 10
6.2 Method of checking stability 11
7 Application of repeatability standard deviation and reproducibility standard deviation in laboratory evaluation 22
7.1 Assessment method 22
7.2 Assessment of measurement methods used by unassessed laboratories 23
7.3 Reassessment of accredited laboratories 25
8 Comparison with alternative measurement methods 29
8.1 Reasons for considering alternative measurement methods 29
8.2 Purpose of the comparison measurement method 29
8.3 Method B. Alternative Standard Method as a Candidate (“Standardized Test” is not established) 29
8.4 Accuracy test 30
8.5 Method B as a candidate for conventional methods 35
Appendix A (Normative) Symbols and abbreviations used in GB/T 6379 37
GB/T 6379.6-2009/ISO 5725-6.1994
Foreword
GB/T 6379 "The accuracy of measurement methods and results (correctness and precision)" is divided into the following six parts, its structure and corresponding country
The standard is.
--- Part 1. General and definitions (ISO 5725-1.1994, IDT);
--- Part 2. Basic methods for determining the repeatability and reproducibility of standard measurement methods (ISO 5725-2.1994 IDT);
--- Part 3. Intermediate measure of precision of standard measurement methods (ISO 5725-3.1994, IDT);
--- Part 4. Basic methods for determining the accuracy of standard measurement methods (ISO 5725-4.1994, IDT);
--- Part 5. Alternative methods for determining the precision of standard measurement methods (ISO 5725-5.1998, IDT);
--- Part 6. Practical application of accuracy values (ISO 5725-6.1994, IDT).
This part is the sixth part of GB/T 6379.
This part is equivalent to the international standard ISO 5725-6.1994 "The accuracy of measurement methods and results (correctness and precision) Part 6
Points. Practical Application of Accuracy Values and ISO Technical Revisions for the.1994 version of ISO 5725-6 issued by ISO .2001-10-15. Correct
The error of ISO 5725-6.1994 was corrected as follows.
--- According to the calculation results, re-drawn Figure 10;
--- In the original table 6, 狓1 totaled 16.84 a calculation error, changed to 16.74.
Part 1 to Part 6 of GB/T 6379 replaces GB/T 6379-1986 and GB/T 11792-1989 as a whole. Standard
The quasi-middle-scale extension of the original precision concept adds to the concept of accuracy, collectively referred to as accuracy; in addition to repetitive conditions and reproducibility conditions,
The intermediate precision condition.
The contents of this section partially replace GB/T 6379-1986 and GB/T 11792-1989.
Appendix A of this section is a normative appendix.
This part was proposed by the Guangdong Entry-Exit Inspection and Quarantine Bureau.
This part is under the jurisdiction of the National Statistical Method Application Standardization Technical Committee.
This section drafted by. Guangdong Entry-Exit Inspection and Quarantine Bureau, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, China Institute of Standardization.
The main drafters of this section. Li Chengming, Feng Shizhen, Zhang Zhenkun, Jiang Jian, Zhou Qi, Ding Wenxing, Song Wuyuan, Yu Zhenfan, Li Zhengjun, Xiao Hui,
Liu Jianbin, Chen Yuzhong.
This section was first released in.2009.
GB/T 6379.6-2009/ISO 5725-6.1994
introduction
0.1 GB/T 6379 uses two terms “correctness” and “precision” to describe the accuracy of a measurement method. Correctness refers to a large number of tests
The degree of agreement between the (arithmetic) mean of the result and the true or accepted reference value; and precision refers to the degree of agreement between the test results.
0.2 The reason for considering precision is mainly because it is assumed that the same material (material/material) that is the same or considered to be the same under the same conditions
Testing, generally won't get the same result. This is mainly because random errors are inevitable in each measurement procedure, and those
Factors affecting measurement results are not fully controlled. This variation must be considered in the actual interpretation of the measured data. example
For example, the difference between the test result and the specified value may be within the unavoidable random error range. In this case, between the test value and the specified value
The true deviation is not certain. Similarly, when comparing the test results of two batches of materials, if the difference between them is from the measurement program
Intrinsic changes cannot reveal the essential difference between the two batches of materials.
Sections 1 through 5 of 0.3 GB/T 6379 discuss precision (represented by repeatability standard deviation and reproducibility standard deviation) and accuracy (using
The components of the bias represent the background of the assessment and give the test results obtained using a standard measurement method to the precision and accuracy.
Some methods of line assessment. However, if the assessment results cannot be used in practice, these assessment methods lose their meaning.
0.4 Once the accuracy of the measurement method is determined, this part of GB/T 6379 will use this knowledge to facilitate business and trade, while using
To supervise and improve the operation of the laboratory.
GB/T 6379.6-2009/ISO 5725-6.1994
Measurement method and accuracy of results
(correctness and precision)
Part 6. Practical application of accuracy values
1 range
1.1 GB/T 6379 The purpose of this section is to illustrate the various practical situations in which accuracy data can be applied.
a) Given standard methods for calculating repeatability limits, reproducibility limits, and other limits, these calculated limits will be used to check the use criteria.
The test results obtained by the quasi-measurement method;
b) proposing a method for accepting the test results obtained under repetitive or reproducible conditions;
c) Describe how to assess the stability of a laboratory's test results over a period of time, thereby providing “quality control” for in-lab operations
Method
d) describe how to assess whether a particular laboratory has the ability to properly use a given standard measurement method;
e) Describe how to compare alternative measurement methods.
1.2 The measurement methods involved in this section refer to the measurement of continuous quantities, and only one measurement value is taken at a time as the measurement re...