prEN ISO 4259-2

Petroleum and related products - Precision of measurement methods and results - Part 2: Interpretation and application of precision data in relation to methods of test (ISO/DIS 4259-2:2025)

ISO 4259-2:2017 specifies the methodology for the application of precision estimates of a test method derived from ISO 4259‑1. In particular, it defines the procedures for setting the property specification limits based upon test method precision where the property is determined using a specific test method, and in determining the specification conformance status when there are conflicting results between supplier and receiver. Other applications of this test method precision are briefly described in principle without the associated procedures.
The procedures in ISO 4259-2:2017 have been designed specifically for petroleum and petroleum-related products, which are normally homogeneous. However, the procedures described in ISO 4259-2:2017 can also be applied to other types of homogeneous products. Careful investigations are necessary before applying ISO 4259-2:2017 to products for which the assumption of homogeneity can be questioned.

Mineralöl und verwandte Produkte - Präzision von Messverfahren und Ergebnissen - Teil 2: Interpretation und Anwendung der Präzisionsdaten von Prüfverfahren (ISO/DIS 4259‑2:2025)

Produits pétroliers et connexes - Fidélité des méthodes de mesure et de leurs résultats - Partie 2: Interprétation et application des valeurs de fidélité relatives aux méthodes d'essai (ISO/DIS 4259-2:2025)

Le présent document prescrit la méthodologie pour l'application des estimations de fidélité d'une méthode d'essai déterminée selon l'ISO 4259‑1. En particulier, il définit les procédures à suivre pour fixer les limites de spécification d'une caractéristique sur la base de la fidélité de la méthode d'essai qui permet de déterminer la caractéristique en utilisant une méthode d'essai spécifique et pour déterminer l'état de conformité à une spécification quand il y a des résultats contradictoires entre le fournisseur et le destinataire. D'autres applications de cette fidélité des méthodes d'essai sont brièvement décrites en principe sans les procédures associées.
Les procédures du présent document ont été conçues spécifiquement pour les produits pétroliers et leurs produits connexes qui sont normalement 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 le présent document à des produits pour lesquels la présomption d'homogénéité peut être mise en question.

Nafta in sorodni proizvodi - Natančnost merilnih metod in rezultatov - 2. del: Razlaga in uporaba podatkov o natančnosti preskusnih metod (ISO/DIS 4259-2:2025)

General Information

• Status: Not Published
• Publication Date: 02-Nov-2026
• ICS: 75.080 - Petroleum products in general
• Technical Committee: CEN/TC 19 - Petroleum products, lubricants and related products
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 10-Apr-2025
• Completion Date: 10-Apr-2025
• Ref Project: oSIST prEN ISO 4259-2:2025 - Petroleum and related products - Precision of measurement methods and results - Part 2: Interpretation and application of precision data in relation to methods of test (ISO/DIS 4259-2:2025)

Relations

• Revises: EN ISO 4259-2:2017 - Petroleum and related products - Precision of measurement methods and results - Part 2: Interpretation and application of precision data in relation to methods of test (ISO 4259-2:2017)
• Effective Date: 21-Feb-2024
• Revises: EN ISO 4259-2:2017/A1:2019 - Petroleum and related products - Precision of measurement methods and results - Part 2: Interpretation and application of precision data in relation to methods of test - Amendment 1 (ISO 4259-2:2017/Amd 1:2019)
• Effective Date: 21-Feb-2024

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2025
Nafta in sorodni proizvodi - Natančnost merilnih metod in rezultatov - 2. del:
Razlaga in uporaba podatkov o natančnosti preskusnih metod (ISO/DIS 4259-
2:2025)
Petroleum and related products - Precision of measurement methods and results - Part
2: Interpretation and application of precision data in relation to methods of test (ISO/DIS
4259-2:2025)
Mineralöl und verwandte Produkte - Präzision von Messverfahren und Ergebnissen - Teil
2: Interpretation und Anwendung der Präzisionsdaten von Prüfverfahren (ISO/DIS 4259-
2:2025)
Produits pétroliers et connexes - Fidélité des méthodes de mesure et de leurs résultats -
Partie 2: Interprétation et application des valeurs de fidélité relatives aux méthodes
d'essai (ISO/DIS 4259-2:2025)
Ta slovenski standard je istoveten z: prEN ISO 4259-2
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.

DRAFT
International
Standard
ISO/DIS 4259-2
ISO/TC 28
Petroleum and related products —
Secretariat: NEN
Precision of measurement methods
Voting begins on:
and results —
2025-04-08
Part 2:
Voting terminates on:
2025-07-01
Interpretation and application
of precision data in relation to
methods of test
Produits pétroliers et connexes — Fidélité des méthodes de
mesure et de leurs résultats —
Partie 2: Application des valeurs de fidélité relatives aux
méthodes d'essai
ICS: 75.080
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
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Reference number
ISO/DIS 4259-2:2025(en)
DRAFT
ISO/DIS 4259-2:2025(en)
International
Standard
ISO/DIS 4259-2
ISO/TC 28
Petroleum and related products —
Secretariat: NEN
Precision of measurement methods
Voting begins on:
and results —
2025-04-08
Part 2:
Voting terminates on:
2025-07-01
Interpretation and application
of precision data in relation to
methods of test
Produits pétroliers et connexes — Fidélité des méthodes de
mesure et de leurs résultats —
Partie 2: Application des valeurs de fidélité relatives aux
méthodes d'essai
ICS: 75.080
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
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BE CONSIDERED IN THE LIGHT OF THEIR
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POTENTIAL TO BECOME STANDARDS TO
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or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
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CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 4259-2:2025(en)
ii
ISO/DIS 4259-2:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Application and significance of repeatability, r, and reproducibility, R . 2
4.1 General .2
4.2 Repeatability, r.2
4.2.1 General .2
4.2.2 Acceptability of results .2
4.2.3 Confidence limits calculations using results collected under repeatability
conditions .3
4.3 Reproducibility, R .3
4.3.1 Acceptability of results .3
4.3.2 Confidence limits calculations using results collected under reproducibility
conditions .5
4.4 Use of reproducibility to determine bias between two different test methods that
purport to measure the same property .5
4.4.1 General .5
4.4.2 Process .5
5 Specifications . 6
5.1 Aim of specifications .6
5.2 Construction of specifications limits in relation to scope and precision of the specified
test method .6
6 Assessment of quality conformance to specification . 8
6.1 General .8
6.2 Assessment of quality conformance by the supplier .8
6.3 Assessment of quality conformance by the recipient .9
6.3.1 General .9
6.3.2 Single batch of product .9
6.3.3 Multiple batches of product .9
6.3.4 Procedure for recipient to assess conformance for a single batch of product .10
7 Dispute procedure .11
7.1 Resolve dispute by negotiation .11
7.2 Use of the test method or procedure in case of dispute .11
7.3 Dispute resolution procedure . 12
7.4 Dispute unresolved . 12
7.5 Example of a dispute resolution . 13
Annex A (informative) Explanation of formulae given in Clause 4 .15
Annex B (informative) Dispute resolution for specifications based on a specified degree of
criticality . 17
Annex C (informative) General approach to bias assessment using multiple materials .20
Annex D (informative) Glossary .21
Bibliography .22

iii
ISO/DIS 4259-2:2025(en)
Foreword
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