What is a dependency type categorized under PERT?

The correct answer identifies a dependency type known as "Finish-Start" within the Program Evaluation and Review Technique (PERT). This dependency type indicates that one task (the successor) cannot start until another task (the predecessor) has finished. This is the most common type of dependency and is crucial for effective project scheduling. It establishes a clear sequence of events in which tasks are executed, helping project managers understand the workflow and time constraints necessary for completing a project.

Understanding this dependency type is essential for project planning, as it often determines the critical path of a project. The critical path is defined by the longest sequence of dependent tasks that dictate the shortest time to complete the project. By identifying Finish-Start dependencies, project managers can better allocate resources, schedule tasks realistically, and anticipate potential delays in the project timeline.

The other options do not represent standard dependency types widely recognized in PERT methodology. For instance, "Start-Progress" is not a defined dependency type in PERT, while "Start-Finish" and "End-Start" also describe relationships that are not used as frequently in conventional project management frameworks.