Conformity Assessment Under Uncertainty
Measurement uncertainty and conformity assessment - From uncertainty to risk

Since every measurement result has an associated uncertainty, any conformity decision made based on a measurement result carries a risk of decision error, that is:

• declaring a product or measuring instrument to be compliant when it is, in fact, non-compliant. This risk will be referred to as the “Customer Risk” ( $R_c$ ) in the remainder of this document;

• declaring a product or measuring instrument nonconforming when it is, in fact, conforming. This risk will be referred to as the “Supplier Risk” ( $R_p$ ) in the remainder of this document.

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