Determination Risk Level Associated to Decision of Conformity to Specification for Environmental Laboratories

Authors: Shaltout M*

DOI: 10.23880/ijoac-16000194

Volume 4, Issue 3

Abstract

Before 2017, there aren’t standards obligated analytical laboratories even accredited to take measurement uncertainty into account in the decision for acceptation or rejection the samples result to a specification, so the decision of conformity for all results closed to specification limits became doubtable. Now in the recent edition of ISO Standard (ISO/IEC 17025:2017) decision rules become obligatory for both testing and calibration laboratories, a clause number 7.8.3 titled “Reporting statement of conformity” stated the laboratories shall document the decision-rule employed and taking into account the risk level. The environmental measurements are critical and mistakes occur in decision lead to a disaster, so this paper concerned to explain different methods of decision-rules used and calculate the risk level relevant to each decision through the practical implementation these decisions by Kafe EL Seikh accredited water laboratory.

Keywords: ISO/IEC 17025/2017, Decision Rules ; Uncertainty ; Specification/ Tolerance Limits ; Statement of Conformity; Risk Level

View PDF