This article presents a concept-guided approach to the assessment of risk in the life situations of children alleged to be maltreatment victims. This concept-guided risk assessment is theoretically based and is the first to use a nomological hierarchy which can yield itself to systematic testing...

Two-stage replacement strategies are described and related to manpower systems. This consists of setting up a training grade to supplement an organisation of fixed size. Results are obtained to show what site the training grade should be in order that, on average, people spend some predetermined...