Why participate in PTs?

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• To have the quality of your test results independently assessed, benchmarked against other laboratories worldwide.

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• To identify training needs, maintain competence, and highlight areas for improvement.

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• To ensure reproducibility, confirming that the laboratory delivers consistent and reliable results to its customers.

 

• To comply with ISO/IEC 17025 requirements—proficiency tests should cover all accredited analyses if such programs are available.

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Beyond internal performance evaluations, proficiency tests serve to:

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• Compare different analytical methods, using actual measurement results.

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• Detect systematic and random errors in analyses, enabling timely corrective actions.

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• Estimate your measurement uncertainty, or provide a robust cross-check to existing uncertainty calculations.

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• Document laboratory competence, in compliance with applicable standards.

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