More optimistic likely Pessimist Expected Variance Activity Predecessors Timet m 2 7 9 B 6 8 C A 2 4 6 D BC 2 5 8 E B.D 2 3 4 Construct the project Network Find the expected duration and Variance of each activity Find the critical path CPM and expected project completion time CP and slake time ST What is the probability of completion the project on or before 23 weeks? ta C od te eb od CP CPM 16 2 value of FROM standard normal distribution table