The precision of binary measurement methods

Abstract

In analogy to quantitative measurement methods the precision of binary measurement methods used in a population of laboratories can be characterised by the repeatability standard deviation and the reproducibility standard deviation of the probability of detection, POD. In order to estimate these standard deviations an interlaboratory experiment with k laboratories, each performing n repeated binary measurements at identical samples, is carried out according to ISO 5725-2 and analysed with a one-way analysis of variance. The variance estimates are, e.g., used for a test of equal POD of all laboratories and for the determination of a 90 %-expectation tolerance interval for the PODs of the laboratories.