by Hening Huang
This technical note reports a case study that addresses a challenge of interlaboratory consensus building called for by Possolo (2020). The consensus value is estimated as a weighted-average (WA) and the associated standard uncertainty (SU) is estimated with a formula that is applicable to any type of weight. In addition to the traditionally used “degree of equivalence,” the performance of a participating laboratory is also evaluated with the root mean square percentage error (RMSPE) of its measured value with respect to the consensus value.
