19) Tom Schriber, a director of personnel of 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. Some of the information on the activities is shown in the following table:
ACTIVITY a m b PREDECESSORS
A 8 10 12 –
B 6 7 9 –
C 3 3 4 –
D 10 20 30 A
E 6 7 8 C
G 6 7 10 B,D,E
H 14 15 16 F
I 10 11 13 F
J 6 7 8 G, H
K 4 7 8 I, J
L 1 2 4 G,H
(A) Construct a network for this problem.
(B) Determine the expected time and variance for each activity.
(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 70 days or less
(F) Determine the probability that the project will be finished in 80 days or less
(G) Determine the probability that the project will be finished in 90 days or less
No credit will be granted for problems that are not completed using Excel, for which your Excel worksheet is not fully functional, or for which you have not shown all of the calculations or other work performed to derive your answer(s). You may refer to the course textbooks, supplemental reading materials, online information, and your own notes in conjunction with completing the homework assignments. Once you have completed the necessary calculations to solve each problem and answer the associated questions, select the hyperlink provided to submit your Excel spreadsheet for grading.