Step 3:For all tasks on Critical Path (Task1, Task 3, Task 4, Task n), EF = LF & ES = LS

Thus, float (slack) for tasks on Critical Path = LF – EF = 0
Float for Task 2 = LF – EF

Now Finally, Project Float is the total amount of time that the project can be delayed
without delaying the project completion date required by the customer.