摘要: In this paper we deal with a stochastic project network and consider the impact of activity delay to maximize expected present value project. It is shown that in certain situations, delaying onset an from its earliest start time can indeed increase due postponing associated negative cash flows. Furthermore, could otherwise be rejected may become profitable positive delay. We demonstrate even activities on critical path, as determined by each activity's duration, profitably delayed. Optimal approximate procedures are developed determine amount various activities.