EN ISO 4259:2006
(Main)Petroleum products - Determination and application of precision data in relation to methods of test (ISO 4259:2006)
Petroleum products - Determination and application of precision data in relation to methods of test (ISO 4259:2006)
ISO 4259:2006 covers the calculation of precision estimates and their application to specifications. In particular, it contains definitions of relevant statistical terms, the procedures to be adopted in the planning of an inter-laboratory test programme to determine the precision of a test method, the method of calculating the precision from the results of such a programme, and the procedure to be followed in the interpretation of laboratory results in relation both to precision of the test methods and to the limits laid down in specifications.
The procedures in ISO 4259:2006 have been designed specifically for petroleum and petroleum-related products, which are normally homogeneous. However, the procedures described in this International Standard can also be applied to other types of homogeneous products. Careful investigations are necessary before applying ISO 4259:2006 to products for which the assumption of homogeneity can be questioned.
Mineralölerzeugnisse - Bestimmung und Anwendung der Werte für die Präzision von Prüfverfahren (ISO 4259:2006)
Diese Internationale Norm umfasst die Berechnung von Schätzwerten für die Präzision sowie deren Anwendung auf Spezifikationen. Insbesondere enthält sie Definitionen für wichtige statistische Ausdrücke (siehe Abschnitt 3), die zu treffenden Maßnahmen für die Planung von Ringversuchsprogrammen für die Bestimmung der Präzision eines Prüfverfahrens (siehe Abschnitt 4), die Methodik zur Berechnung der Präzision aus den Ergebnissen von derartigen Programmen (siehe Abschnitte 5 und 6) und das anzuwendende Vorgehen für die Interpretation der Ergebnisse von einzelnen Laboratorien sowohl im Hinblick auf die Präzision des Prüfverfahrens als auch im Hinblick auf die Grenzwerte, die in Spezifikationen genannt werden (siehe Abschnitte 7 bis 10).
Es wird ausdrücklich darauf hingewiesen, dass die Verfahren in dieser Internationalen Norm zur Anwendung für Mineralölerzeugnisse und verwandte Produkte entwickelt worden sind, die im Allgemeinen homogene Produkte sind. Bevor die Anwendung dieser Internationalen Norm auf andere Erzeugnisse, bei denen die Ausnahme der Homogenität hinterfragt werden kann, ausgeweitet wird, sollten sorgfältige Untersuchungen hinsichtlich der Anwendbarkeit erwogen werden. Trotzdem sollte beachtet werden, dass die in dieser Internationalen Norm beschriebenen Verfahren auch auf andere Typen von homogenen Erzeugnissen angewendet werden können.
Produits pétroliers - Détermination et application des valeurs de fidélité relatives aux méthodes d'essai (ISO 4259:2006)
L'ISO 4259:2006 traite du calcul des estimations de fidélité et de leur application aux spécifications. En particulier, elle contient les définitions des termes statistiques concernés, les procédures à suivre dans l'organisation d'un programme d'essai interlaboratoires destiné à déterminer la fidélité d'une méthode d'essai, la méthode de calcul de la fidélité à partir des résultats d'un tel programme et la procédure à suivre dans l'interprétation des résultats de laboratoire, à la lumière de la fidélité des méthodes de test et des limites fixées dans les spécifications.
Les procédures de l'ISO 4259:2006 ont été conçues spécifiquement pour les produits pétroliers et leurs produits connexes, qui sont normalement homogènes. Cependant on reconnaît que les procédures décrites dans l'ISO 4259:2006 peuvent aussi s'appliquer à d'autres types de produits homogènes. Des contrôles attentifs s'avèrent nécessaires avant d'appliquer l'ISO 4259:2006 à des produits pour lesquels la présomption d'homogénéité peut être mise en question.
Naftni proizvodi - Določanje in uporaba stopenj natančnosti pri preskusnih metodah (ISO 4259:2006)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2006
1DGRPHãþD
SIST EN ISO 4259:1998
1DIWQLSURL]YRGL'RORþDQMHLQXSRUDEDVWRSHQMQDWDQþQRVWLSULSUHVNXVQLK
PHWRGDK ,62
Petroleum products - Determination and application of precision data in relation to
methods of test (ISO 4259:2006)
Mineralölerzeugnisse - Bestimmung und Anwendung der Werte für die Präzision von
Prüfverfahren (ISO 4259:2006)
Produits pétroliers - Détermination et application des valeurs de fidélité relatives aux
méthodes d'essai (ISO 4259:2006)
Ta slovenski standard je istoveten z: EN ISO 4259:2006
ICS:
75.080 Naftni proizvodi na splošno Petroleum products in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 4259
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2006
ICS 75.080 Supersedes EN ISO 4259:1995
English Version
Petroleum products - Determination and application of precision
data in relation to methods of test (ISO 4259:2006)
Produits pétroliers - Détermination et application des Mineralölerzeugnisse - Bestimmung und Anwendung der
valeurs de fidélité relatives aux méthodes d'essai (ISO Werte für die Präzision von Prüfverfahren (ISO 4259:2006)
4259:2006)
This European Standard was approved by CEN on 1 July 2006.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4259:2006: E
worldwide for CEN national Members.
Foreword
This document (EN ISO 4259:2006) has been prepared by Technical Committee ISO/TC 28
"Petroleum products and lubricants" 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 February 2007, and conflicting national
standards shall be withdrawn at the latest by February 2007.
This document supersedes EN ISO 4259:1995.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Endorsement notice
The text of ISO 4259:2006 has been approved by CEN as EN ISO 4259:2006 without any
modifications.
INTERNATIONAL ISO
STANDARD 4259
Third edition
2006-08-01
Petroleum products — Determination and
application of precision data in relation to
methods of test
Produits pétroliers — Détermination et application des valeurs de
fidélité relatives aux méthodes d'essai
Reference number
ISO 4259:2006(E)
©
ISO 2006
ISO 4259:2006(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
© ISO 2006
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2006 – All rights reserved
ISO 4259:2006(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 inter-laboratory test programme 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 programme with at least two laboratories. 5
4.4 Planning the inter-laboratory programme. 5
4.5 Executing the inter-laboratory programme.5
5 Inspection of inter-laboratory results for uniformity and for outliers . 6
5.1 General. 6
5.2 Transformation of data. 7
5.3 Tests for outliers. 8
5.4 Rejection of complete data from a sample . 11
5.5 Estimating missing or rejected values . 12
5.6 Rejection test for outlying laboratories. 13
5.7 Confirmation of selected transformation .14
6 Analysis of variance, calculation and expression of precision estimates . 14
6.1 General. 14
6.2 Analysis of variance . 14
6.3 Expectation of mean squares and calculation of precision estimates . 17
6.4 Expression of precision estimates of a method of test. 20
7 Significance of repeatability (r) and reproducibility (R). 21
7.1 General. 21
7.2 Repeatability, r . 21
7.3 Reproducibility, R.22
8 Specifications. 24
8.1 Aim of specifications. 24
8.2 Construction of specifications limits in relation to precision. 24
9 Quality control against specifications. 25
9.1 General. 25
9.2 Testing margin at the supplier . 25
9.3 Testing margin at the recipient . 25
10 Dispute procedure . 25
Annex A (normative) Determination of number of samples required. 28
Annex B (informative) Derivation of equation for calculating the number of samples required . 30
Annex C (normative) Notation and tests. 31
Annex D (normative) Example results of test for determination of bromine number and statistical
tables. 36
Annex E (normative) Types of dependence and corresponding transformations. 45
Annex F (normative) Weighted linear regression analysis. 49
ISO 4259:2006(E)
Annex G (normative) Rules for rounding off results . 56
Annex H (informative) Explanation of equations given in Clause 7 . 57
Annex I (informative) Specifications that relate to a specified degree of criticality. 59
Bibliography . 62
iv © ISO 2006 – All rights reserved
ISO 4259:2006(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 4259 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants.
This third edition cancels and replaces the second edition (ISO 4259:1992), Clauses 1, 5, 7 C.7, E.2 and F.3
and subclauses 4.2, 5.2, 6.3.2, 6.3.3.1, 6.3.3.3, 6.4, 8.2, 10.2, 10.4 and 10.5, which have been technically
revised. It also incorporates the Technical Corrigendum ISO 4259:1992/Cor.1:1993.
---------------
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.