c) Find CP and expected project completion time

d) What is the probability of completing the project on OR before 22 weeks?

CPM & PERT Duration (Weeks) Mean Duration SD Varience Predecesor te-(Expected Time)=1 Activity A B Optimistic (to) 5 Most Likely (tm) 6 Pessimistic (tp) 7 O=(tp-to)/6 0.33 6 1 3 0.67 3 4 5 7 1 4 1.00 o?=[(tp-to)/6] 0.11 0.44 1.00 0.11 1.78 1.78 1.00 D A 1 2 3 2 0.33 E B 1 2 9 3 1.33 F C 1 5 9 5 1.33 G 2 2 8 3 1.00 H E,F 4 4 10 5 1.00 1.00 1.00 1 D 2 5 8 5 1.00 J HG 2 2 8 3 1.00 1.00 EXERCISE: a) b) Construct the project network Find expected duration & variance of each activity Find CP and expected project completion time What is the probability of completing the project on OR before 22 weeks d)