For the network shown below, identify the critical path and calculate the probability of finishing the project in more than 25 weeks (i.e. P(>25) = ?) Note that the expected time and variance for each activity are already computed for you.

1/2) Which is the critical path?

ACE

DE

ABE

2/2) What is the probability of finishing the project in more than 25 weeks (i.e. P(>25) = ?)

14.3%

15.9%

31.0%

27.7%

Expected Activity time Variance A 8 3 B 7 1 1 48 ES 9 4 9 D 18 2 E 5 2 2 D 18