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Why participate in PTs?
  • To have the quality of your test results assessed by an external partner, in comparison to other laboratories worldwide
  • To identify needs for training, maintain competence and indicate areas of improvement
  • To make sure that the laboratory is able to deliver reproducible results to its customers
  • To meet the requirements of ISO/IEC 17025. PTs must cover all accredited analyzes if such programs exist
Independent of the internal performance evaluation, proficiency tests serve:
  • in the comparison of different methods, by comparing actual detected measurement results
  • in the detection of systematic and random errors in analyses, allowing corrective actions to be taken
  • ​in the calculation of your own degree of measurement uncertainty, or in providing a plausible cross-check to your existing estimation
  • in the documentation, compliant to standards, of your own competence

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