ISO 4259-2:2017 PDF

Petroleum and related products — Precision of measurement methods and results — Part 2: Interpretation and application of precision data in relation to methods of test

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Title (English):

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

Document status:: Withdrawn
Format:: Electronic (PDF)
Number of pages:: 25
Publication date:: November 1, 2017
Edition:: ISO IS 4259 edition 1 version 1
ICS:: 75.080

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Description (English):

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.

Technical details

Technical committee: ISO/TC 28 - Petroleum and related products, fuels and lubricants from natural or synthetic sources
SKU: ISO 4259-2:2017

Abstract

Overview

ISO 4259-2:2017 - Petroleum and related products: Precision of measurement methods and results - Part 2 specifies how to interpret and apply precision data (repeatability and reproducibility) derived from ISO 4259‑1. It defines procedures for setting property specification limits based on test‑method precision, for assessing specification conformance when supplier and receiver test results conflict, and for other precision‑related uses (with procedural detail focused on petroleum and related homogeneous products). The standard assumes test methods are in statistical control and is intended as the practical companion to ISO 4259‑1.

Key topics and requirements

Precision parameters: Use of repeatability (r) and reproducibility (R) estimates for assessing agreement between test results and for confidence limits on measured values.
Result acceptability: Procedures for accepting or rejecting individual or multiple results under repeatability conditions (including guidance when differences exceed r).
Specification limits: Methodology to construct property specification limits that account for the precision of the specified test method.
Conformance assessment: Defined approaches for suppliers and recipients to assess quality conformance for single and multiple batches, and for handling conflicting test outcomes.
Dispute resolution: Stepwise dispute procedure including negotiation, use of agreed test methods, and formal resolution steps when supplier and recipient disagree.
Statistical control and bias: Guidance on determining when a test method or laboratory is “in statistical control,” and approaches to assess bias between different test methods that claim to measure the same property.
Scope limitation: Procedures are designed for normally homogeneous petroleum products; the standard cautions against blind application to heterogeneous products without prior investigation.

Practical applications

Setting realistic and defensible product specifications that incorporate test‑method uncertainty.
Making objective specification‑compliance decisions based on limited test results.
Resolving supplier/recipient disputes where test results differ.
Designing laboratory quality control and proficiency testing (PTP) programs for petroleum test methods.
Comparing and evaluating agreement between alternative test methods for the same property.

Who should use this standard

Quality managers and technical staff in petroleum production, distribution and trading.
Testing and calibration laboratories performing petroleum-related test methods.
Procurement, contract and compliance teams responsible for specification drafting and dispute handling.
Regulatory bodies and standards committees concerned with measurement uncertainty and conformity assessment.

Related standards

ISO 4259-1: Determination of precision data (companion part).
Mentioned alignment with ASTM practices (e.g., ASTM D6300 and ASTM D3244) for precision determination and data utilization.

Keywords: ISO 4259-2:2017, precision of measurement methods, petroleum, repeatability, reproducibility, specification limits, test method precision, statistical control, dispute resolution.

Related standards

Mentioned in the description and other ISO standards

Abstract

Overview

Key topics and requirements

Precision parameters: Use of repeatability (r) and reproducibility (R) estimates for assessing agreement between test results and for confidence limits on measured values.
Result acceptability: Procedures for accepting or rejecting individual or multiple results under repeatability conditions (including guidance when differences exceed r).
Specification limits: Methodology to construct property specification limits that account for the precision of the specified test method.
Conformance assessment: Defined approaches for suppliers and recipients to assess quality conformance for single and multiple batches, and for handling conflicting test outcomes.
Dispute resolution: Stepwise dispute procedure including negotiation, use of agreed test methods, and formal resolution steps when supplier and recipient disagree.
Statistical control and bias: Guidance on determining when a test method or laboratory is “in statistical control,” and approaches to assess bias between different test methods that claim to measure the same property.
Scope limitation: Procedures are designed for normally homogeneous petroleum products; the standard cautions against blind application to heterogeneous products without prior investigation.

Practical applications

Setting realistic and defensible product specifications that incorporate test‑method uncertainty.
Making objective specification‑compliance decisions based on limited test results.
Resolving supplier/recipient disputes where test results differ.
Designing laboratory quality control and proficiency testing (PTP) programs for petroleum test methods.
Comparing and evaluating agreement between alternative test methods for the same property.

Who should use this standard

Quality managers and technical staff in petroleum production, distribution and trading.
Testing and calibration laboratories performing petroleum-related test methods.
Procurement, contract and compliance teams responsible for specification drafting and dispute handling.
Regulatory bodies and standards committees concerned with measurement uncertainty and conformity assessment.

Related standards

ISO 4259-1: Determination of precision data (companion part).
Mentioned alignment with ASTM practices (e.g., ASTM D6300 and ASTM D3244) for precision determination and data utilization.

Keywords: ISO 4259-2:2017, precision of measurement methods, petroleum, repeatability, reproducibility, specification limits, test method precision, statistical control, dispute resolution.

ISO 4259-2:2017 PDF

Technical details

Abstract

Overview

Key topics and requirements

Practical applications

Who should use this standard

Related standards

Related standards

Abstract

Overview

Key topics and requirements

Practical applications

Who should use this standard

Related standards

Related standards

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