Abstract. On the basis of main provisions of ISO standards, reproducibility and repeatability in determination of measured characteristics of. Buy ISO ACCURACY (TRUENESS AND PRECISION) OF MEASUREMENT METHODS AND RESULTS – PART 6: USE IN PRACTICE OF. INTERNATIONAL STANDARD ISO ISO/TC 69, Applications of statistical methods, Subcommittee SC 6, Measurement methods.
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Take the smart isl to manage medical device compliance. IS0 l should be read in conjunction with all other parts of IS0including this part, because it gives the underlying definitions and general principles. The analysis was performed such that in the case where the absence of between-bottle variation is confirmed, the four analytical results can be con- sidered as replicates under repeatability conditions.
The uncertainty in the estimate of the laboratory bias depends on the repeatability of the measurement method and on the number of test results obtained. Comparison of the trueness of two measurement methods is considered in IS0 In some cases it will be important to include, in the assessment exper- iment, a series of reference materials, each corre- sponding to a different level 5275-6 the property, as isp bias of the standard measurement method may be different at different levels.
ISO Accuracy of Measurement Methods and Results Package
You may delete a document from your Alert Profile at any time. You may find similar items within these categories by selecting from the choices below:. C Derivation of equations Each laboratory re- ceived two randomly selected bottles of test sample for each level and performed duplicate analyses on each bottle.
Unless otherwise specified, no part of this publrcation may be reproduced or utrlized In any form or by any means, electronrc ieo mechanical, rncludrng photocopyrng and mrcrofilm, wrthout permission in writing from the publisher.
It may appear that some laboratories did not use the required equipment or did not work ac- cording to izo specified conditions. Anwendungen in der Praxis.
is If the bias is found to be statistically insignif- icant, then the objective is to determine the magnitude of the maximum bias that would, with a certain probability, remain undetected by the results of the experiment. The ISO Accuracy of Measurement Methods and Results Package provides the general principles necessary to accurately assess measurement methods, results, applications and practical estimations.
Use in practice of accuracy values Status: Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.
BS ISO 5725-6:1994
Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. There are three cases, as follows.
Therefore the Index j for the level has been omitted throughout. All standards are subject to revision, and parties to agreements based on this part of IS0 are encouraged to investigate the possibility of applying the most 57256- editions of the standards indicated below. Laboratory means and laboratory variances Lab.
Enoval – References
The linear regression equations of the repeatability and reproducibility standard deviations versus levels of concentration are: Basic methods for the determination of the trueness of a standard measurement method – Part 5: If the reproducibility of the measurement method is poor, then it will not be practical to achieve a high degree of certainty in the estimate of the bias.
When gR is larger than T. Apart from the restriction to 5725–6 single laboratory. The symbols used in IS0 are given in annex 55725-6. Reference materials shall be homogeneous. Iwo laboratory bias is further considered in IS0 Alternative methods for the determination of the precision of a standard measurement method – Part 6: If this is not true, the respective equations given in IS0 should be used to calculate s.
Annexes B, C and D are for information only.
NBN ISO 5725-6
The repeatability and the reproducibility standard de- viations were then computed excluding those data that were discarded. The number of laboratories to be used is discussed in subclause 6. In the former case, the repeatability standard devi- ation of the measurement method, or, will be used for the assessment of the laboratory bias.
Utilization of trueness data Refer to clause 7 of IS0 General principles and definitions – Part 2: If so, what are the improvements required? Outliers and stragglers Level Lab.
What action should be taken with respect to re- jected outlying laboratories? The laboratory means and vari- ances for each of the five test materials are listed in table 8. IS0 consists of the following parts, under the general title Accuracy trueness and precision of measurement methods and results: The test results for each level are shown in figures B. One laboratory re- sult was identified 7525-6 a straggler; it originated from the same laboratory Lab.