ISO 14253-3:2011

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

• ISO 14253-1 (Decision rules for conformance)
• ISO 14253-2 (Guidance for estimation of uncertainty)
• ISO 14978, ISO 17450 series, ISO/IEC Guide 98-3 (GUM), ISO/IEC Guide 99 (VIM)

Keywords: ISO 14253-3, measurement uncertainty, uncertainty budget, GPS, inspection by measurement, geometrical product specifications.