What is "PERT" and "CPM" ? -Objectives and Utility of these two techniques.

Programme Evaluation & Review Technique- Used mostly in a research project, where it is difficult to estimate the time taken for various elements of the project.

Critical Path Method- Critical Path is the time taken by the path which takes the longest time. Thus it helps to calculate the time of completion of the project. There is no uncertainty regarding the time of completion of each element (task).