ISO 4259-3-2020 pdf free.Petroleum and related products —Precision of measurement methodsand results — Monitoring and verification of published precision data in relation tomethods of test.
This document specifies the methodology for the regular monitoring of the test method precisionachieved versus the precision published in the standard test method using data from proficiency testingschemes (PTSs) supported by the regular users of standard test methods.
The procedures in this document are designed specifically for proficiency testing (PT) conductedon standard test methods, having a published reproducibility, for petroleum and petroleum-relatedproducts, which are presumed to be homogeneous, and where the data distribution is approximatelynormal.In addition, it is applicable to properties of interest that are (known to be) stable over time andtransport.
This document specifies the methodology for the statistical comparison of standard deviation underreproducibility conditions achieved in PT programmes versus that published.The purpose of this comparison is to find out if the published reproducibility precision is representativeof that achievable by the regular participants in the PT programmes.This document also provides guidance on how to use a PT z-score to monitor an individual participant’sperformance over time (see Annex B).
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies. Forundated references, the latest edition of the referenced document (including any amendments) applies.ISO 4259-1, Petroleum and related products — Precision of measurement methods and results — Part 1:Determination of precision data in relation to methods of test.ISo 13528:2015, Statistical methods for use in proficiency testing by interlaboratory comparisonISO/IEC 17043,Conformity assessment — General requirements for proficiency testing. For the purposes of this document,the terms and definitions given in lSO 4259-1,ISO 13528,ISO/IEC 17043 and the following apply.
evaluation of participant performance against pre-established criteria by means of interlaboratorycomparisons
programme designed for the periodic evaluation of participating laboratories’ proficiency in theexecution of a standard test method through the statistical analysis of their test results obtained onaliquots prepared from a single batch of homogeneous material
Note 1 to entry: The frequency of such testing varies in accordance with the scheme objective.Each execution oftesting involves testing of a single batch of material.Materials typically vary from test to test.
Note 2 to entry: This is also commonly referred to as the “Inter Laboratory Cross Check Programme”.ISO 4259 pdf download.