The Farmer’s American Bank of Leesburg is planning to install a new computerized accounts system. Bank management has determined the activities required to complete the project, the precedence relationships of the activities, and activity time estimates, as shown in the following table: Activity Activity Description Activity Predecessor a m b
A Recruiting - 5 8 17
B System development - 3 12 15
C System training A 4 7 10
D Equipment training A 5 8 23
E Manual system test B, C 1 1 1
F Preliminary system changeover B, C 1 4 13
G Computer-personnel
interface D, E 3 6 9
H Equipment modification D, E 1 2.5 7
I Equipment testing H 1 1 1
J System debugging &
installation F, G 2 2 2
K Equipment changeover J, I 5 8 11

a. Determine the expected time for each activity.
b. Draw the activity network showing the ET, ES, EF, LS and LF.
c. State the critical path for this project and the expected time for its completion.
d. Determine the project standard deviation to two decimal places