Project management and resources handling in multiproject environments

When the same resources are used by more than one project, the problem of guaranteeing the availability of the necessary resources for the single activities arises for the project manager. In order to level the resources over-assigned, due to the fact that the resources are generally limited, each activity, of different projects, can be associated with an order of priority which will establish the precedence of the concerned activities to be executed (multiproject management). The choice of the order of priority must be coherent to get a good result. In this article there are different simulations presented. In cases when a multiproject management is possible, a simulation that will aid the project manager with his choice of what would be considered the best order of priority is presented. For cases in which it is impossible to set up a multiproject plan (divisional structure, instable market . . .) the use of a simulation based on the ‘Monte Carlo’ technique can be of use for planning in condition of uncertainty in which aleatory durations of activities depend upon the uncertainty associated with the resources available.