ISO 5725-2:2019 测量方法和结果的准确性（真度和精密度） 第2部分：标准测量方法的重复性和再现性测定的基本方法

标准编号：ISO 5725-2:2019

中文名称：测量方法和结果的准确性（真度和精密度） 第2部分：标准测量方法的重复性和再现性测定的基本方法

英文名称：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

发布日期：2019-12

标准范围

1.1本文件-通过实验室间合作实验，扩大设计实验以数值估计测量方法精度的一般原则；-提供用于估计测量方法精度的常规使用的基本方法的详细实际描述；-向所有参与设计、执行或分析测试结果以估计精密度的人员提供指导。注:ISO 5725的其他部分给出了针对特定目的对该基本方法的修改。1.2它只涉及在连续尺度上进行测量并给出单个值作为测试结果的测量方法，尽管该单个值可以是根据一组观察结果计算的结果。1.3假设精密度实验的设计和性能符合ISO 5725-1中规定的所有原则。基本方法在每个实验室使用相同数量的测试结果，每个实验室分析相同水平的测试样品；即平衡的均匀水平实验。基本方法适用于已经标准化并在许多实验室中常规使用的程序。1.4 ISO 5725-1:19 94第5条的统计模型被接受为解释和分析试验结果的合适基础，其分布近似为正态分布。1.5本文件所述的基本方法（通常）估计测量方法的精密度:a）当需要确定ISO 5725中定义的重复性和再现性标准偏差时-1;b)当要使用的材料是均匀的时，或者当异质性的影响可以包括在精密度值中时；和c)当使用平衡的均匀水平布局是可接受的。1.6对于未达到标准化或不在常规使用中的测量方法，可采用相同的方法对精密度进行初步估计。

1.1 This document— amplifies the general principles for designing experiments for the numerical estimation of the precision of measurement methods by means of a collaborative interlaboratory experiment;— provides a detailed practical description of the basic method for routine use in estimating the precision of measurement methods;— provides guidance to all personnel concerned with designing, performing or analysing the results of the tests for estimating precision.NOTE Modifications to this basic method for particular purposes are given in other parts of ISO 5725.1.2 It is concerned exclusively with measurement methods which yield measurements on a continuous scale and give a single value as the test result, although this single value can be the outcome of a calculation from a set of observations.1.3 It assumes that in the design and performance of the precision experiment, all the principles as laid down in ISO 5725-1 are observed. The basic method uses the same number of test results in each laboratory, with each laboratory analysing the same levels of test sample; i.e. a balanced uniform-level experiment. The basic method applies to procedures that have been standardized and are in regular use in a number of laboratories.1.4 The statistical model of ISO 5725-1:1994, Clause 5, is accepted as a suitable basis for the interpretation and analysis of the test results, the distribution of which is approximately normal.1.5 The basic method, as described in this document, (usually) estimates the precision of a measurement method:a) when it is required to determine the repeatability and reproducibility standard deviations as defined in ISO 5725-1;b) when the materials to be used are homogeneous, or when the effects of heterogeneity can be included in the precision values; andc) when the use of a balanced uniform-level layout is acceptable.1.6 The same approach can be used to make a preliminary estimate of precision for measurement methods which have not reached standardization or are not in routine use.

标准预览图