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Program evaluation and review technique or PERT is a way to see and analyze the relationships between the tasks of a project. It uses a network diagram showing the activities (tasks) and which must occur before others (predecessors). The estimated durations for each activity are added, and then the critical path, slack and float can be calculated along with the critical path. The technique was developed by the U.S. Navy in the 1950s.

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Critical Path on an AoA diagram

Related: Gantt chart, project management software, three-point estimating, critical path method, float, slack, activity diagram, activity duration estimates, early start time (ES), early finish time (EF), late start time (LS), late finish time (LF)

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