ISO/IEC 17025 and Laboratory Competence

ISO/IEC 17025 is an international standard for the competence of testing and calibration laboratories.

Major themes

The standard addresses:

• impartiality
• confidentiality
• organizational structure
• personnel competence
• facilities
• equipment
• metrological traceability
• externally provided services
• method selection and validation
• sampling
• handling of items
• technical records
• measurement uncertainty
• result reporting
• complaints
• nonconforming work
• internal audits
• management review

Accreditation scope

Accreditation applies to a defined scope. A laboratory may be accredited for some methods but not others.

Method validation

Laboratories must establish that methods are suitable for intended use, especially for modified, laboratory-developed, or nonstandard procedures.

Measurement uncertainty

Where relevant, uncertainty helps describe the range around a measured result. It is especially important near specification limits.

Frequently asked questions

Does ISO 17025 accreditation mean every test is accredited?

No. Check the laboratory’s published scope.

Is accreditation the same as certification?

No. Accreditation evaluates laboratory competence for specific activities.

Does accreditation guarantee a correct result?

It increases confidence through systematic controls, but no system eliminates all error.

Why review the scope?

The scope shows which methods and matrices are actually covered.

Key takeaways

ISO/IEC 17025 provides a structured framework for laboratory competence and result reliability. Scope, method coverage, and accreditation status should be verified rather than assumed.

References

1. FDA. Data Integrity and Compliance With Drug CGMP: Questions and Answers.
2. OECD Principles of Good Laboratory Practice.
3. ISO/IEC 17025 overview.

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TSMS Labs educational disclaimer: For laboratory research and educational purposes only. Not for human consumption. This content is not medical, clinical, or regulatory advice.