ISO 13528-2015 pdf free.Statistical methods for use in proficiency testing by interlaboratory comparison.
ISO 13528 provides detailed descriptions of statistical methods for proficiency testing providers to use to design proficiency testing schemes and to analyse the data obtained From those schemes, This Standard provides recommendations on the interpretation of proficiency testing data by pa rticipants in such schemes and by accreditation bodies.
The procedures In this Standard can be appLied to demonstrate that the measurement results obtained by laboratories, inspection bodies, and individuals meet specified criteria for acceptable performance.
This Standard is applicable to proficiency testing where the results reported are either quantitative measuretnentsor qualitative observations on test items.
NOTE The procedures in this Standard may also be applicable to the assnsment ol expert opinion where the opinions or judgments are reported in a bern which stay be compared obiectn’ely with an independent reference value or a consensus statistic. For esaniple. when dnsifying proficiency test Items Into knows categories by inspection – or In determining hy inspection whether proficiency test items arin or do ma arise, (toni the same original s°urce ‘and the classification retuRn are compared objectively, the provisions of this Standard that relate to nominal (qualitative) properties may apply
2 Normative references
The following documents, in whole or In part. are normatively referenced In this document and are indispensable for its application. For dated references, only the edition csted applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO Guide 30, Reference nsaterlols — Selected terms and definitions
ISO 35341, Statistics — Vocabulary and symbols — Part 1: General statistical terms and terms used
In probability
ISO 3534-2, Statistics — Vocabulary and symbols — Part 2: Applied statistics
ISO 5725•1, Accuracy (trueness and precision) qf measurement methods and results — Flirt 1; Gene nil principles arid definitions
ISO/fEC 17043. Conformity assessment — General reioteements for peaficiescy test rng
ISO/IEC Guide 99, International vocabulary W metroloqy — Basic and general concepts and associated
terms f VIM)
3 Terms and definitions
For the purposes of this docunit’nt, the terms and definitions given in ISO 35341, ISO 3534’Z, ISO 5725’t. ISO/IEC 17043. ISO/IEC Guide 99. ISO GuIde 30. and the following apply. In the case of differences between these references on the use of terms, definitions in ISO 3534 parts l2 apply. Mathematical symbols are listed in AnswxA.
3.1 intertaboratory comparison organization, performance and evaluation of measurements or tests on the same or similar items by two or more laboratories in accordance with predetermined conditions.
3.2 proficiency testing
evaluation of participant performance against pre-established criteria by means of interlaboratory comparisons
Note I to entry: For the purposes of this International Standard, the term “proficiency testing” is taken in its widest sense and includes, but Is not limited to:
quantitative scheme — where the objective is to quantify one or more measurands for each proficiency test item;
— qualitative scheme — where the objective is to identify or describe one or more qualitative characteristics of the proficiency test item;
— sequential scheme — where one or more proficiency test items are distributed sequentially for testing or measurement and returned to the proficiency testing provider at intervals;
— Simultaneous scheme — where proficiency test Items are distributed for concurrent testing or measurement within a defined time period;
— single occasion exercise — where proficiency test items are provided on a single occasion;
— continuous scheme — where proficiency test items are provided at regular intervals;
— sampling — where samples are taken for subsequent analysis and the purpose of the proficiency testing scheme includes evaluation of the execution of sampling; and
— data interpretation — where sets ofdata or other information are furnished and the information is processed to provide an interpretation (or other outcome).
3.3 assigned value value attributed to a particular property of a proficiency test item
3.4 standard deviation for proficiency assessment measure of dispersion used in the evaluation of results of proficiency testing.ISO 13528 pdf download.