Program Evaluation and Review Technique (PERT) and Critical Path Method (CPM) are two widely used network-based project management techniques that assist managers in planning, scheduling, monitoring, and controlling complex projects. Although both techniques employ network diagrams to identify project sequences and determine the critical path, they differ significantly in terms of network orientation, treatment of time estimates, and areas of application. The first major distinction lies in their orientation. PERT is event-oriented, meaning that greater emphasis is placed on events or milestones that signify the beginning or completion of activities. In a PERT network, events are represented by nodes, while activities are represented by arrows connecting these nodes. The successful completion of each event indicates progress toward project completion. This orientation is particularly useful when the project consists of several interdependent milestones and management wishes to monitor the achievement of these milestones. In contrast, CPM is activity-oriented. It emphasizes the activities that consume time and resources rather than the events themselves. In CPM networks, activities are generally represented