EN ISO 4259-1:2017

Petroleum and related products - Precision of measurement methods and results - Part 1: Determination of precision data in relation to methods of test (ISO 4259-1:2017)

ISO 4259-1:2017 specifies the methodology for the design of an Interlaboratory Study (ILS) and calculation of precision estimates of a test method specified by the study. In particular, it defines the relevant statistical terms (Clause 3), the procedures to be adopted in the planning of ILS to determine the precision of a test method (Clause 4), and the method of calculating the precision from the results of such a study (Clauses 5 and 6).
The procedures in ISO 4259-1:2017 have been designed specifically for petroleum and petroleum related products, which are normally considered as homogeneous. However, the procedures described in ISO 4259-1:2017 can also be applied to other types of homogeneous products. Careful investigations are necessary before applying ISO 4259-1:2017 to products for which the assumption of homogeneity can be questioned.

Mineralölerzeugnisse - Präzision von Messverfahren und Ergebnissen - Teil 1: Bestimmung der Präzisionsdaten von Prüfverfahren (ISO 4259-1:2017)

Diese Internationale Norm umfasst die Methodik für die Auslegung einer Laborvergleichsuntersuchung (ILS, en: Interlaboratory Study) und die Berechnung von Schätzwerten für die Präzision eines durch die Untersuchung festgelegten Prüfverfahrens. Insbesondere enthält sie Definitionen für wichtige statistische Begriffe (siehe Abschnitt 3), die zu ergreifenden Maßnahmen für die Planung von ILS zur Bestimmung der Präzision eines Prüfverfahrens (siehe Abschnitt 4) und die Methodik zur Berechnung der Präzision aus den Ergebnissen einer derartigen Untersuchung (Abschnitte 5 und 6).
Die Verfahren in dieser Internationalen Norm wurden speziell für Mineralölerzeugnisse und verwandte Produkte entwickelt, die im Allgemeinen homogene Produkte sind. Die in dieser Internationalen Norm beschriebenen Verfahren können jedoch auch auf andere Arten von homogenen Erzeugnissen angewendet werden. Vor der Anwendung dieser Internationalen Norm auf andere Erzeugnisse, bei denen die Ausnahme der Homogenität hinterfragt werden kann, sind sorgfältige Untersuchungen hinsichtlich der Anwendbarkeit erforderlich.

Produits pétroliers et connexes - Fidélité des méthodes de mesure et de leurs résultats - Partie 1: Détermination des valeurs de fidélité relatives aux méthodes d'essai (ISO 4259-1:2017)

ISO 4259-1:2017 spécifié la méthodologie pour la conception d'un essai interlaboratoires (ILS) et pour le calcul des estimations de fidélité d'une méthode d'essai spécifié par cet ILS. En particulier, il définit les termes statistiques concernés (Article 3), les procédures à suivre dans l'organisation d'un ILS destiné à déterminer la fidélité d'une méthode d'essai (Article 4) et la méthode de calcul de la fidélité à partir des résultats d'un tel ILS (Articles 5 et 6).
Les procédures de l' ISO 4259-1:2017 ont été conçues spécifiquement pour les produits pétroliers et leurs produits connexes qui sont normalement considérés homogènes. Les procédures décrites dans le présent document peuvent cependant aussi s'appliquer à d'autres types de produits homogènes. Il est nécessaire de procéder à des contrôles attentifs avant d'appliquer ce document à des produits pour lesquels la présomption d'homogénéité peut être mise en question.

Nafta in sorodni proizvodi - Natančnost merilnih metod in rezultatov - 1. del: Določevanje natančnosti preskusnih metod (ISO 4259-1:2017)

Ta dokument opredeljuje metodologijo za načrtovanje medlaboratorijske študije (ILS) in izračun stopnje natančnosti preskusne metode, ki jo je določila študija. Še zlasti določa ustrezne statistične izraze (točka 3), postopke za načrtovanje medlaboratorijske študije za določitev natančnosti preskusne metode (točka 4) in metodo za izračun natančnosti na podlagi rezultatov take študije (točki 5 in 6).
Postopki v tem dokumentu so bili zasnovani posebej za nafto in sorodne
proizvode, ki se običajno obravnavajo kot homogeni. Kljub temu pa se postopke, opisane v tem
dokumentu, lahko uporablja tudi za druge vrste homogenih proizvodov. Pred uporabo tega dokumenta za proizvode, pri katerih je predpostavka o homogenosti lahko vprašljiva, so potrebne
temeljite preiskave.

General Information

• Status: Published
• Publication Date: 05-Dec-2017
• Withdrawal Date: 29-Jun-2018
• ICS: 75.080 - Petroleum products in general
• Technical Committee: CEN/TC 19 - Petroleum products, lubricants and related products
• Drafting Committee: CEN/TC 19 - Petroleum products, lubricants and related products
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 06-Dec-2017
• Completion Date: 06-Dec-2017
• Ref Project: SIST EN ISO 4259-1:2018 - Petroleum and related products - Precision of measurement methods and results - Part 1: Determination of precision data in relation to methods of test (ISO 4259-1:2017)

Relations

• Replaces: EN ISO 4259:2006 - Petroleum products - Determination and application of precision data in relation to methods of test (ISO 4259:2006)
• Effective Date: 08-Jun-2022
• Amended By: EN ISO 4259-1:2017/A2:2020 - Petroleum and related products - Precision of measurement methods and results - Part 1: Determination of precision data in relation to methods of test - Amendment 2 (ISO 4259-1:2017/Amd 2:2020)
• Effective Date: 04-Mar-2020
• Amended By: EN ISO 4259-1:2017/A1:2019 - Petroleum and related products - Precision of measurement methods and results - Part 1: Determination of precision data in relation to methods of test - Amendment 1 (ISO 4259-1:2017/Amd 1:2019)
• Effective Date: 10-Oct-2018

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2018
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SIST EN ISO 4259:2006
1DIWDLQVRURGQLSURL]YRGL1DWDQþQRVWPHULOQLKPHWRGLQUH]XOWDWRYGHO
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Petroleum and related products - Precision of measurement methods and results - Part
1: Determination of precision data in relation to methods of test (ISO 4259-1:2017)
Mineralölerzeugnisse - Präzision von Messverfahren und Ergebnissen - Teil 1:
Bestimmung der Werte für die Präzision von Prüfverfahren (ISO 4259-1:2017)
Produits pétroliers - Fidélité des méthodes de mesure et des résultats - Partie 1:
Détermination des valeurs de fidélité relatives aux méthodes d'essai (ISO 4259-1:2017)
Ta slovenski standard je istoveten z: EN ISO 4259-1:2017
ICS:
75.080 Naftni proizvodi na splošno Petroleum products in
general
75.180.30 Oprema za merjenje Volumetric equipment and
prostornine in merjenje measurements
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 4259-1
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2017
EUROPÄISCHE NORM
ICS 75.080 Supersedes EN ISO 4259:2006
English Version
Petroleum and related products - Precision of
measurement methods and results - Part 1: Determination
of precision data in relation to methods of test (ISO 4259-
1:2017)
Produits pétroliers et connexes - Fidélité des méthodes Mineralölerzeugnisse - Präzision von Messverfahren
de mesure et de leurs résultats - Partie 1: und Ergebnissen - Teil 1: Bestimmung der Werte für
Détermination des valeurs de fidélité relatives aux die Präzision von Prüfverfahren (ISO 4259-1:2017)
méthodes d'essai (ISO 4259-1:2017)
This European Standard was approved by CEN on 27 October 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4259-1:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 4259-1:2017) has been prepared by Technical Committee ISO/TC 28
"Petroleum and related products, fuels and lubricants from natural or synthetic sources" in
collaboration with Technical Committee CEN/TC 19 “Gaseous and liquid fuels, lubricants and related
products of petroleum, synthetic and biological origin” the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by June 2018, and conflicting national standards shall be
withdrawn at the latest by June 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 4259:2006.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 4259-1:2017 has been approved by CEN as EN ISO 4259-1:2017 without any
modification.
INTERNATIONAL ISO
STANDARD 4259-1
First edition
2017-11
Petroleum and related products —
Precision of measurement methods
and results —
Part 1:
Determination of precision data in
relation to methods of test
Produits pétroliers — Fidélité des méthodes de mesure et des
résultats —
Partie 1: Détermination des valeurs de fidélité relatives aux
méthodes d'essai
Reference number
ISO 4259-1:2017(E)
©
ISO 2017
ISO 4259-1:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
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ii © ISO 2017 – All rights reserved

ISO 4259-1:2017(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Stages in the planning of an interlaboratory study for the determination of the
precision of a test method . 4
4.1 General . 4
4.2 Preparing a draft method of test . 5
4.3 Planning a pilot study with at least two laboratories . 5
4.4 Planning the ILS . 5
4.5 Executing the ILS . 6
5 Statistical treatment of ILS results . 7
5.1 General recommendation . 7
5.2 Pre-screen using GESD technique . 7
5.3 Transformation of data and outlier tests . 8
5.3.1 General. 8
5.3.2 Outlier identification after pre-screening .11
5.3.3 Uniformity of repeatability .11
5.3.4 Uniformity of reproducibility.11
5.4 Rejection of complete data (from all laboratories) for a sample .11
5.5 Estimating missing or rejected values .12
5.5.1 One of the two repeat values missing or rejected .12
5.5.2 Both repeat values missing or rejected .12
5.6 Rejection test for outlying laboratories .12
5.7 Confirmation of selected transformation .13
5.7.1 General.13
5.7.2 Identification of excessively influential sample(s) .13
6 Analysis of variance, calculation and expression of precision estimates .14
6.1 General .14
6.2 Analysis of variance .14
6.2.1 Forming the sums of squares for the laboratories × samples interaction
sum of squares .14
6.2.2 Forming the sum of squares for the exact analysis of variance .15
6.2.3 Degrees of freedom . .15
6.2.4 Mean squares and analysis of variance .15
6.3 Expectation of mean squares and calculation of precision estimates .15
6.3.1 Expectation of mean squares with no estimated values .15
6.3.2 Expectation of mean squares with estimated values .16
6.3.3 Calculation of precision estimates .17
6.4 Expression of precision estimates of a method of test .18
6.5 Specification of scope for the test method .19
7 R/r ratio .20
Annex A (normative) Determination of number of samples required.21
Annex B (informative) Derivation of formula for estimating the number of laboratories and
samples required to meet minimum 30 degrees of freedom .23
Annex C (normative) Notation and tests .25
Annex D (normative) Illustration of procedures using ILS results for Bromine Number and
statistical tables .
...