Tom Schriber, a director of personnel at Management Resources, Inc., is in the process of designing a program that its customers can use in the job-finding process. Some of the activities include preparing resumes, writing letters, making appointments to see prospective employers, researching companies, and industries, and so on. Necessary information on the activities is shown in the following table:
ACTIVITY OPTIMISTIC PESSIMISTIC MOST LIKELY IMMEDIATE PREDECESSORS
A 4 6 5 -
B 2 8 5 -
C 5 9 7 A
D 4 6 5 A
E 2 6 4 B
F 3 9 6 B
G 10 12 11 C,E
H 7 9 8 D,F
Required:
a. Construct a network for this problem.
b. Compute the expected time for each activity, also the variance.
c. Determine ES, EF, LS, LF, and slack for each activity.
d. Determine the critical path and project completion time.
e. Determine the probability that the project will be finished in 23 days or less.
f. Determine the probability the the project will NOT be finished in 26 days or less.
g. Determine the probability that the project will be finished in 25 days or less.
h. If a manager considers crashing any of the tasks to reduce the duration of the project completion time, which tasks should he/she focus on? Why?