Overview
EN ISO 14253-3:2011 (ISO 14253-3:2011) is part of the Geometrical Product Specifications (GPS) series and provides guidelines and procedures to help customers and suppliers reach amicable agreements on disputed measurement uncertainty statements. Published by ISO and adopted by CEN, this standard complements ISO 14253-1 (decision rules) and ISO 14253-2 (uncertainty estimation) and is intended to reduce costly, time-consuming disputes arising from differing uncertainty budgets or measured values.
Key topics
- Purpose and scope: Procedures for resolving disagreements about stated expanded measurement uncertainty when applying ISO 14253-1 decision rules for conformity assessment.
- Uncertainty budgets: Responsibility of the party preparing the uncertainty statement to justify components and the resulting expanded uncertainty.
- Early agreement (pre-contract): Encourages resolving uncertainty expectations during contract negotiation to avoid later disputes and duplicate inspections.
- Parties and roles: Uses the “party 1 / party 2” model - the measuring party states the uncertainty (party 1); the other may question it (party 2).
- Dispute resolution options:
- Accepting one party’s stated uncertainty
- Applying the sequential procedure described in Clause 5
- Using third‑party review or consultation
- Procedural content: Includes a sequential evaluation procedure for reaching agreement and an informative Annex A explaining the relation to the GPS matrix model.
- Normative references: Cross-references core metrology standards (e.g., ISO 14253-1, ISO 14253-2, ISO 14978, ISO/IEC Guide 98-3 GUM, VIM).
Applications
This standard is practical for organizations and professionals involved in measurement-based inspection and conformity assessment:
- Metrology and calibration laboratories - to document and defend uncertainty budgets
- Suppliers and manufacturers - to establish measurement statements that support claims of conformance
- Customers and procurement teams - to assess and challenge supplier measurement uncertainty when accepting or rejecting product
- Quality managers and engineers - to reduce duplication of inspection and avoid contractual disputes
- Third‑party reviewers and dispute mediators - to apply standardized procedures when resolving disagreements
By promoting early agreement on measurement uncertainty and providing a structured procedure for disputes, EN ISO 14253-3 helps ensure consistent, transparent decisions in geometrical product specification (GPS) inspections.
Related standards
- ISO 14253-1: Decision rules for conformity
- ISO 14253-2: Guidance for estimation of uncertainty in GPS measurement
- ISO 14978: GPS measuring equipment
- ISO/IEC Guide 98-3 (GUM): Expression of uncertainty in measurement
- ISO/IEC Guide 99 (VIM)
- ISO 17450 series (GPS general concepts)
