Which project scheduling technique identifies the longest path of activities that determines project completion time?

Which project scheduling technique identifies the longest path of activities that determines project completion time?

• A. Gantt Chart
• B. PERT
• C. Critical Path Method (CPM)
• D. Slack Analysis

Answer: (C)

The critical path is the sequence of dependent activities that determines the project's duration. In the Critical Path Method, you map every activity, its duration, and how it depends on others, then compute the earliest and latest times each activity can start and finish. The path through the project network with no slack—meaning there’s no room to delay any activity without delaying the whole project—has the greatest total duration. That path sets the finish date; any delay on an activity along it pushes the project end time. Gantt charts visualize the schedule but don’t inherently pinpoint which path controls the overall duration. PERT focuses on probabilistic time estimates and the likelihood of meeting deadlines, rather than explicitly identifying the longest path. Slack analysis looks at the flexibility (float) for activities, which is useful for resource loading and risk, but the technique that specifically identifies the longest path that drives completion is the Critical Path Method.

The critical path is the sequence of dependent activities that determines the project's duration. In the Critical Path Method, you map every activity, its duration, and how it depends on others, then compute the earliest and latest times each activity can start and finish. The path through the project network with no slack—meaning there’s no room to delay any activity without delaying the whole project—has the greatest total duration. That path sets the finish date; any delay on an activity along it pushes the project end time.

Gantt charts visualize the schedule but don’t inherently pinpoint which path controls the overall duration. PERT focuses on probabilistic time estimates and the likelihood of meeting deadlines, rather than explicitly identifying the longest path. Slack analysis looks at the flexibility (float) for activities, which is useful for resource loading and risk, but the technique that specifically identifies the longest path that drives completion is the Critical Path Method.