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Reference Material
Reference documents and regulatory information relevant to ISO 17025 compliance.
ISO/IEC 17025:2017
Structured integration of ISO/IEC 17025:2017, providing a reference for testing and calibration laboratory requirements. The official ISO PDFs remain the primary authoritative source.
Annex A (Informative) Metrological Traceability
A.3 Demonstrating Metrological Traceability
Laboratories are responsible for establishing metrological traceability, ensuring their calibration results conform to this document, and using internationally recognized paths to demonstrate conformity.

Reference Material
Reference documents and regulatory information relevant to ISO 17025 compliance.
- ISO/IEC 17025:2017
  Structured integration of ISO/IEC 17025:2017, providing a reference for testing and calibration laboratory requirements. The official ISO PDFs remain the primary authoritative source.
  - Foreword
  - Introduction
    This document establishes requirements for laboratories to ensure competence, confidence, and valid results, aligning with ISO 9001 principles. It emphasizes risk-based planning, cooperation, and harmonization of standards while outlining key terminology usage.
  - 1 Scope
    This document defines the general requirements for laboratory competence, impartiality, and consistent operation, applicable to all organizations conducting laboratory activities.
  - 2 Normative References
    This section lists documents that are referenced in the text as requirements. Dated references apply to specific editions, while undated references apply to the latest version, including amendments.
  - 3 Terms and Definitions
    This section defines the terms used in this document. It references ISO/IEC Guide 99 and ISO/IEC 17000, along with additional terms specific to this standard.
  - 4 General requirements
  - 5 Structural requirements
  - 6 Resource requirements
  - 7 Process requirements
  - 8 Management system requirements
  - Annex A (Informative) Metrological Traceability
    - A.1 General
      This section provides additional information on metrological traceability, ensuring comparability of measurement results both nationally and internationally.
    - A.2 Establishing Metrological Traceability
      Metrological traceability is established by ensuring an unbroken chain of calibrations, measurement uncertainty evaluation, and technical competence in measurement processes.
    - A.3 Demonstrating Metrological Traceability
      Laboratories are responsible for establishing metrological traceability, ensuring their calibration results conform to this document, and using internationally recognized paths to demonstrate conformity.
  - Annex B (Informative) Management System Options
    This annex provides additional information on the management system options available to laboratories, ensuring conformity to ISO 9001 while fulfilling the requirements of this document.

A.3 Demonstrating Metrological Traceability

Laboratories are responsible for establishing metrological traceability, ensuring their calibration results conform to this document, and using internationally recognized paths to demonstrate conformity.

A.3.1 Establishing Metrological Traceability

Laboratories are responsible for establishing metrological traceability in accordance with this document. Calibration results from laboratories conforming to this document provide metrological traceability. Certified values of certified reference materials from reference material producers conforming to ISO 17034 provide metrological traceability.

There are various ways to demonstrate conformity with this document, including:

Third-party recognition (such as an accreditation body).
External assessment by customers.
Self-assessment.

Internationally accepted paths include, but are not limited to, the following:

Calibration and measurement capabilities provided by national metrology institutes and designated institutes that have been subject to suitable peer-review processes.
Such peer-review is conducted under the **CIPM MRA (International Committee for Weights and Measures Mutual Recognition Arrangement)**.

Services covered by the CIPM MRA can be viewed in **Appendix C of the BIPM KCDB (International Bureau of Weights and Measures Key Comparison Database)**, which details the range and measurement uncertainty for each listed service.
Calibration and measurement capabilities accredited by an accreditation body subject to the ILAC (International Laboratory Accreditation Cooperation) Arrangement or to Regional Arrangements recognized by ILAC.
Scopes of accredited laboratories are publicly available from their respective accreditation bodies.

A.3.2 Internationally Recognized Guidance

The **Joint BIPM, OIML (International Organization of Legal Metrology), ILAC, and ISO Declaration on Metrological Traceability provides specific guidance when there is a need to demonstrate international acceptability of the metrological traceability chain**.