Problem 1 Seven activities are candidates for crashing on a network. The activity details are in the table below. Normal Crash Normal Crash Time Time Cost Cost (days) (time) A none 8 6 100 120 B none 8 7 120 180 C A 5 4 80 100 D A 4 3 120 150 G B,D 5 4 160 200 E B,D 3 3 14 0 F C,E 3 1 80 200 Mark the correct answer Reduce the project by 3 days. Below is the order of crashing for each day and the total added cost. O day 1 = A; day 2 = C; day 3D. The total added cost = $60 The duration of the critical path is the average duration of all paths in the project network. O day 1 A, day 2 = A day 3 = G. The total added cost = $40 day 1 A; day 2 A; day 3D. The total added cost = $50 Problem 2 Consider the network described in the table below. Most Immediate Optimistic Likely Pessimistic Activity Predecessor(s) Time (days) Time (days) Time (days) A none 5 8 17 B none 7 10 13 C A 3 5 7 D A 1 3 5 G B,D 4 6 E B,D 3 3 F C,E 2 3 8 37 What is the probability that the project can be completed in 19 days or less O about 42% 78% about 58% about 22%