standard measurement uncertainty that is obtained using the individual standard measurement uncertainties associated with the input quantities in a measurement model
NOTE In case of correlations of input quantities in a measurement model, covariances must also be taken into account when calculating the combined standard measurement uncertainty; see also ISO/IEC Guide 98-3:2008, 2.3.4.
ANNOTATION (informative) [1 December 2014] Here "standard measurement uncertainty" can be replaced by "standard uncertainty" in both occurrences without ambiguity: "standard uncertainty that is obtained using the individual standard uncertainties associated with the input quantities in a measurement model".