What is Difference between CPM and PERT ?

Difference between CPM and PERT:

Sr. No.	CPM	PERT
1.	It stands for Critical Path Method.	It stands for Program Evaluation and Review Technique.
2.	Used to control time and cost.	Used to control Time
3.	Activity focused technique	Event focused technique
4.	It is deterministic model used where occurrence of all events is known with certainty.	It is probabilistic model used where occurrence of events cannot perfectly predicted.
5.	Time required for each activity is known and defined for project.	Time is not much importance in this technique.
6.	It used for comparatively small projects.	I used for larger project.
7.	It uses single time estimate for carrying out of activity.	It uses three time estimate for carrying out of activity
8.	Suitable for Construction projects.	Suitable for Research and development, Investigation, Design.