A study on interval PERT/CPM network problems

Abstract

Critical Path method (CPM) is widely used in development preparation and controlling. In conventional development preparation problem, the crisp numbers are used for the activity times. But in certainty, in a vague and doubtful situation, it is an unlikely assumption. To represent the ambiguity involved we have measured the interval-valued numbers to correspond to the activity times. Within this manuscript, an approach of solving an interval PERT/CPM problem has been considered. We include measured interval numbers to characterize the action period which be extra sensible in natural world. This progression is based lying on interval investigation as well as provide each and every one the parameter occupied in the established PERT/CPM method counting interval most recent starting and concluding times in the system. It involves a shortest way that is extremely easy and simple to know, both for technical and non-technical people. Since the information of the difficulty is interval numbers, the grades are in addition in conditions of interval numbers. A mathematical model illustrates the method.