Uncertainty Management versus Risk Management in Calibration
Uncertainty Management versus Risk Management in Calibration
Jim Salsbury
This paper studies the impact of the conformance decision rule used in compliance assessment during the calibration process on the subsequent measurements made using the calibrated measuring instrument. The rules that are evaluated include the default rule of ISO 14253-1, the recommendations of ILAC-G8, the 2 % probability of false accept (PFA) in ANSI/NCSL Z540.3, the 4:1 test uncertainty ratio (TUR), and the simple and stringent acceptance decision rules of ASME B89.7.3.1.
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