DHATOZ: a computer code for the statistical analysis of operator-inspector measurement differences

DHATOZ is a computer program designed to aid the safeguards data analyst to objectively assess operator-inspector measurement differences occurring among a sample of items or materials selected randomly by the inspector from the operator's physical inventory listing. DHATOZ provides the requisite calculations for estimating process, systematic, and random error variances. These variance estimates are then used to test hypotheses concerning the operator's stated material balance. DHATOZ includes features to detect outliers and plots to graphically reveal the underlying structure of the paired measurement data. A recent development by Jaech is incorporated to avoid the problem of negative variance estimates. (author)