UKAS Calibrations Only - Decision Rules
What is a decision rule? A rule that describes how measurement uncertainty is accounted for when stating conformity with a specified requirement. (ISO/IEC 17025:2017-1, 3.7).
A requirement of ISO/IEC 17025 is for customers to confirm the decision rule required to be used when reporting any conformance to tolerance / specification.
Gedore are required to demonstrate to UKAS that the decision rule has been applied when stating any conformity statement, which has been agreed by the customer and that the decision rule is appropriate.
Gedore shall use the following decision rules;
DR 0
For Transducers - No decision rule applied (Measurements are reported with suitable uncertainty of measurement)
For Hand Tools - No allowable will be used for the Expected Measurement Error or the Expected Relative Uncertainty Interval
DR 1 - Publish Standard Conformance (Conformance is undertaken as specified within the relevant published standard, with Fail, Pass or Conditional Pass)
Fail - Measurements out of standards parameters
Pass - Measurements within standard parameters including measurement uncertainties
Conditional Pass - Measurements within standard parameters, but excluding measurement uncertainties
For Hand Tools - Expected measurement error shall be equal to the maximum permissible relative deviation per ISO6789-1:2017 5.1.5. The relative uncertainty interval shall be 150% of this value.
DR 2 - Customer Specified
For Transducers: maximum acceptable level of uncertainty to be defined and additional costs to be agreed before commencing work
For Hand Tools: maximum acceptable Expected Measurement Error and the maximum acceptable Expected Relative Uncertainty Interval to be defined and additional costs to be agreed before commencing work
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