ABSTRACT
Basic critical path method (CPM) and program evaluation and review technique (PERT) approaches assume unlimited resource availability in project network analysis. In realistic projects, both the time and resource requirements of activities should be considered in developing network schedules. Projects are subject to three major constraints: time limitations, resource constraints, and performance requirements. Since these constraints are difficult to satisfy simultaneously, trade-offs must be made. The smaller the resource base, the longer the project schedule. Resource allocation facilitates the transition of a project from one state to another state. Given that the progress of a project is in an initial state defined as Si and a future state is defined as S f , then the following three possible changes can occur.
