What is the use of PERT (Program evaluation and review technique)?

It is used for Employee Appraisal. After the review , you can find the cream employees and also the trouble makers. But the KPI's set for the program should be selected after careful review.

Project management technique that shows the time taken by each component of a project, and the total time required for its completion. PERT breaks down the project into events and activities, and lays down their proper sequence, relationships, and duration in the form of a network. Lines connecting the events are called paths, and the longest path resulting from connecting all events is called the critical path. The length (duration) of the critical path is the duration of the project, and any delay occurring along it delays the whole project. PERT is a scheduling tool, and does not help in finding the best or the shortest way to complete a project.