Project planning Critical path analysis

Activities that have no float are critical activities.

Delay in a critical activity will cause delay to the overall project completion date.

Joining all critical activities in a PERT diagram identifies the critical path.

The critical path is the longest path through a PERT diagram.

The total time on the critical path is the shortest time in which the project can be completed.

Project planning Formula

EST + duration = EFTLFT - duration = LSTFloat = LST - EST

RulesWhen an activity has multiple

predecessor activities, on a forward pass use the highest EFT as the next EST.

When an activity has multiple successor activities, on a backward pass use the lowest LST as the next LFT.