This paper proposes a decision support model for ranking project network activities and classifying those activities into groups. The model is based on multiple criteria (indexes) that derived from the precedence, duration and cost of the activities. The uniqueness of the model is that the...

The setting of time standards by work measurement is costly and consumes much time and effort. Therefore, the aims are to minimise time measurements while guaranteeing that the measurements are sufficient to provide a required statistical precision. This paper presents two methods for...

At a common due date, k orders with known quantities of the same product should be delivered. The product can be manufactured by n producers with stochastic production capabilities (random yields). The expected capability and its standard deviation increase linearly with the allocated budget,...