通过统计方法确保校准和测试结果的有效性

IF 0.1 Q4 INSTRUMENTS & INSTRUMENTATION
Alexander Kolbasin
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引用次数: 0

摘要

根据ISO/IEC 17025:2017的要求,通过对获得的结果进行实验室内检查,确保测试和校准结果的有效性。在这种情况下,最好使用统计方法。ISO 5725标准定义了许多此类方法,但具体方法的选择由实验室决定,同时考虑到所执行工作所需的努力、资源和时间的充分性要求以及获得不适当结果的风险。在这种情况下,实验室本身必须以某种方式确定哪些校准(测试)对象应主要用于检查,以及应预见检查频率。随着测量系统精度和复杂性的提高,应用随机过程理论的方法变得越来越明显。结果表明,使用庞加莱图可以从所获得的测量结果的动力学角度全面、有效和直观地评估测量过程中的变化。检查结果,特别是中间精度,使其能够根据ISO 21748获得更真实的测量不确定度评估。本文分析了实验室内校准(测试)结果有效性检查的一些实用方法(具有不同程度的复杂性)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ensuring the validity of the results of calibrations and tests by statistical methods
According to the requirements of ISO/IEC 17025:2017, the validity of test and calibration results is ensured, inter alia, by intralaboratory check of the results obtained. In this case, it is preferable to use statistical methods. The ISO 5725 standards define a number of such methods, but the choice of specific methods is left to the laboratory, taking into account the requirements for the adequacy of the effort, resources and time for the purposes of the work performed and the risks of obtaining inappropriate results. In this case, the laboratory itself must in a certain way determine which objects of calibrations (tests) should be predominantly used in checks and what frequency of checks should be foreseen. In connection with the increase in the accuracy and complexity of measuring systems, the need to apply the methods of the theory of random processes becomes more and more obvious. It is shown that the use of the Poincaré plot makes it possible to comprehensively, effectively and visually evaluate changes in the measuring process from the point of view of the dynamics of the obtained measurement results. The results of the check, in particular, the intermediate precision, make it possible to obtain a more realistic evaluation of measurement uncertainty in accordance with ISO 21748. The paper analyses some practical approaches (of varying degrees of complexity) to intralaboratory checks of the validity of calibration (test) results.
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来源期刊
Ukrainian Metrological Journal
Ukrainian Metrological Journal INSTRUMENTS & INSTRUMENTATION-
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