Definition · Plain-language
ISO/IEC 17025
ISO/IEC 17025 is the principal international standard for the competence of testing and calibration laboratories and the basis for their accreditation.
The step most authors miss
Doing CRediT right? Don’t stop at the statement.
A CRediT statement credits you inside one paper. The recognition CRediT was built for happens when those roles are tied to you, persistently. Sign in with your ORCID — free — and claim your CRediT contributions on casrai.org, the home of the standard. They become a verified, portable part of your identity, not a line that disappears into one PDF.
Free: claim your contributions, then export a journal-ready CRediT statement, schema.org structured data, JATS XML, CSV or BibTeX — and preview your public profile. A membership publishes that profile publicly and verifies the journals you serve.
Competence, not just a quality system
ISO/IEC 17025 is distinctive because it addresses technical competence, not only management. A laboratory can have orderly procedures yet still produce invalid results if its methods, equipment or staff are inadequate, so the standard requires the laboratory to demonstrate that it is technically capable of producing valid data. It sets requirements for the competence of personnel, the suitability and calibration of equipment, the validation of methods, the estimation of measurement uncertainty, and metrological traceability. This focus on competence is why accreditation to ISO/IEC 17025 carries weight that a general management-system certification does not.
Structure of the 2017 revision
ISO/IEC 17025:2017 is organised around general requirements (impartiality and confidentiality), structural requirements, resource requirements (personnel, facilities, equipment, externally provided products and services), process requirements (method selection and validation, sampling, handling of items, measurement uncertainty, ensuring validity of results, reporting), and management-system requirements. The 2017 revision introduced risk-based thinking and gave laboratories flexibility to align their management system with ISO 9001 or run an equivalent process-based system. Together these requirements ensure results are technically sound and the laboratory operates impartially and consistently.
Accreditation and ILAC recognition
Laboratories are accredited to ISO/IEC 17025 by national accreditation bodies, which assess competence rather than merely audit a management system. The International Laboratory Accreditation Cooperation (ILAC) coordinates a global arrangement so that an accredited laboratory’s results are recognised across borders, supporting the principle of tested or calibrated once, accepted everywhere. This international recognition is central to trade, regulation and science, because it lets a result issued by an accredited laboratory in one country be trusted by customers and regulators in another without retesting.
Key facts
At a glance
- Definition: general requirements for the competence of testing and calibration laboratories
- Current version: ISO/IEC 17025:2017
- Covers: competence, impartiality, methods, measurement uncertainty, traceability
- Used for: laboratory accreditation, not certification
- International recognition: coordinated through ILAC
- Distinctive feature: assesses technical competence, not just a quality system
Common misconceptions
What people often get wrong
Often heard: ISO/IEC 17025 laboratories are certified, like ISO 9001 companies.
Actually: Laboratories are accredited to ISO/IEC 17025, not certified. Accreditation is a formal recognition of technical competence by an accreditation body, which goes beyond confirming conformity to a management system as certification does.
Often heard: ISO/IEC 17025 is just ISO 9001 for laboratories.
Actually: ISO/IEC 17025 includes management-system requirements similar to ISO 9001, but adds extensive technical requirements — method validation, measurement uncertainty, metrological traceability and personnel competence — that assess whether the laboratory can produce valid results, not just whether it is organised.
Often heard: Accreditation to ISO/IEC 17025 only matters in one country.
Actually: Through the ILAC arrangement, accreditation is mutually recognised internationally. Results from an accredited laboratory are accepted across borders, which is the whole point of the standard for trade and regulation.
Going deeper
