Project planning and control: An enhanced PERT network

In PERT, activities are not assigned a priority ranking. The criticality of an activity is, for the most part, limited to whether or not it is on the critical path. Further, under PERT, the maximum tolerable execution delay for each activity is unknown. A model is developed to address these limitations using the finalized PERT plan as its point of departure. In this model, a procedure is proposed to (a) assign a priority ranking to every activity, (b) compute the highest completion delay absorbable at each activity, and (c) determine, for all activities, the probability of completion within their latest allowable time.