The critical path approach places emphasis on the activities in a project and understanding the shortest time to complete all activities in a logical order. It is a sequence of activities through a precedence network from start to finish, the sum of whose durations determines the overall duration.
Critical path analysis is an activity- based scheduling technique that determines the overall duration of the identified work based on estimates and logical dependencies.
It is the method of determining the critical path. Critical path analysis is almost exclusively performed using desktop scheduling software, although it is a key skill for project professionals to understand how this is done so they can verify that the project schedule is built on complete and defensible logic.
The purpose of a project manager understanding a project’s critical path(s) is to be able to focus effort in managing the activities that lie on it with the knowledge that if all of them complete on time, and if there is no slippage on other activities that exceeds the total float, the whole project will finish on time.