Overview
ISO 14253-3:2011 - part of the Geometrical Product Specifications (GPS) series - provides practical guidelines and defined procedures to help customers and suppliers reach amicable agreements on disputed measurement uncertainty statements arising during inspection by measurement. The standard complements ISO 14253-1 (decision rules) and ISO 14253-2 (uncertainty estimation) by focusing on how to document, present and negotiate measurement uncertainty (expanded uncertainty) so that costly disputes are avoided.
Key topics
- Purpose and scope: Procedures for resolving disagreements on stated measurement uncertainty for workpieces and measuring equipment inspected by measurement.
- Uncertainty budget: Emphasis that the supporting uncertainty budget and its preconditions are the basis for agreement (refer to ISO 14253-2 for budgeting details).
- Pre-contract agreement: Encourages early (pre-contract) agreement on uncertainty magnitude and application rules to prevent later conflicts.
- Dispute resolution options:
- Accept one party’s statement,
- Prepare or disclose an uncertainty budget,
- Use third‑party evaluation or review,
- Sequential re-evaluation and modification of the uncertainty budget.
- Sequential procedure (Clause 5): A stepwise sequence of activities (documented stages) for evaluating and agreeing an uncertainty statement - clause-by-clause agreement is recommended so changes propagate to the final expanded uncertainty.
- Roles: Defines “party 1” (the measurer who states the uncertainty) and “party 2” (the party likely to question it) to clarify responsibilities in negotiations.
- Relation to GPS matrix: Annex A describes links to the broader GPS framework and standards.
Applications
ISO 14253-3 is used to:
- Resolve supplier/customer disputes over measurement uncertainty in acceptance testing or calibration.
- Support quality systems that depend on mutually agreed verification practices to avoid duplicate inspections.
- Provide a structured negotiation and documentation method when uncertainty estimates differ due to expertise, assumptions, or measurement conditions.
- Guide internal and external auditors, technical reviewers, and third-party consultants when evaluating uncertainty statements.
Who should use it
- Quality managers and metrology engineers in manufacturing and calibration laboratories
- Suppliers and customers engaging in contract inspections and acceptance testing
- Technical reviewers, dispute mediators and third-party evaluators
- Standards and compliance professionals implementing GPS decision rules
Related standards
Keywords: ISO 14253-3, measurement uncertainty, uncertainty budget, GPS, inspection by measurement, geometrical product specifications.
Open preview (PDF)Geometrical product specifications (GPS) — Inspection by measurement of workpieces and measuring equipment — Part 3: Guidelines for achieving agreements on measurement uncertainty statements