Introduction Proficiency testing is an important element of ISO/IEC 17025 accreditation. So important, that it has its own ISO standard (i.e. ISO/IEC 17043). In addition to the international standard, proficiency testing has plenty of endorsement via ILAC and accreditation body policies. There is a ton of information on proficiency testing available to laboratories seeking […]
Calculating normalized error is common for laboratories participating in proficiency testing or interlaboratory comparisons. If you have participated in a proficiency test before, you may have noticed it in your final summary report either by name or abbreviated ‘En.’ When you participate in proficiency tests, the PT provider calculates normalized error for you. However, if […]
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