Chapter 11 Project Management

51) Given an activity's optimistic, most likely, and pessimistic time estimates of 2, 10, and 20 days respectively, compute the PERT variance for this activity.

A) 3

B) 6

C) 9

D) 18

E) None of the above

52) Given an activity's optimistic, most likely, and pessimistic time estimates of 4, 12, and 18 days respectively, compute the PERT variance for this activity.

A) 2.33

B) 5.44

C) 8.00

D) 64.00

E) None of the above

53) Given an activity's optimistic, most likely, and pessimistic time estimates of 3, 5, and 15 days, respectively, compute the PERT standard deviation for this activity.

A) 2

B) 4

C) 5

D) 15

E) None of the above

54) Given the following small project, the critical path is ________ days.

Activity	Immediate Predecessor	Time (days)
A	-	10
B	-	4
C	A, B	6

A) 10

B) 14

C) 16

D) 20

E) None of the above

55) Given the following small project, the critical path is ________ days.

Activity	Immediate Predecessor	Time (days)
A	-	8
B	A	4
C	-	10

A) 4

B) 10

C) 12

D) 22

E) None of the above

56) Using the data in Table 11-1, what is the minimum possible time required for completing the project?

A) 8

B) 14

C) 25

D) 10

E) None of the above

57) Using the data in Table 11-1, what is the latest possible time that C may be started without delaying completion of the project?

A) 0

B) 4

C) 8

D) 10

E) None of the above

58) According to Table 11-1, compute the slack time for activity D.

A) 0

B) 5

C) 3

D) 6

E) None of the above

59) Using the data in Table 11-1, compute the latest finish time for activity E.

A) 4

B) 10

C) 14

D) 25

E) None of the above

60) According to the data in Table 11-2, what is the critical path?

A) A-B

B) A-C

C) B-D

D) A-B-C-D

E) None of the above

61) According to the data in Table 11-2, what is the minimum expected completion time for the project?

A) 18

B) 19

C) 37

D) 11

E) None of the above

62) According to Table 11-2, there are four activities in the project. Assume the normal distribution is appropriate to use to determine the probability of finishing by a particular time. If you wished to find the probability of finishing the project in 20 weeks or fewer, it would be necessary to find the variance and then the standard deviation to be used with the normal distribution. What variance would be used?

A) 2

B) 4

C) 8

D) 12

E) None of the above

63) According to Table 11-2, there are four activities in the project. Assume the normal distribution is appropriate to use to determine the probability of finishing by a particular time. What is the probability that the project is finished in 16 weeks or fewer? (Round to two decimals.)

A) 0.07

B) 0.93

C) 0.43

D) 0.77

E) None of the above

64) Consider a project that has an expected completion time of 60 weeks and a standard deviation of five weeks. What is the probability that the project is finished in 70 weeks or fewer? (Round to two decimals.)

A) 0.98

B) 0.48

C) 0.50

D) 0.02

E) 0.63

65) Your company is considering submitting a bid on a major project. You determine that the expected completion time is 100 weeks and the standard deviation is 10 weeks. It is assumed that the normal distribution applies. You wish to set the due date for the project such that there is an 85 percent chance that the project will be finished by this time. What due date should be set?

A) 108.0

B) 110.4

C) 89.6

D) 85.0

E) 100

66) According to Table 11-3, there are five activities in a PERT project. Which activities are on the critical path?

A) A-B-C-D-E

B) A-C-E

C) B-D

D) A-B-C-D

E) B-E

67) According to Table 11-3, there are five activities in a PERT project. What is the variance of the critical path?

A) 5.222

B) 4.222

C) 1.222

D) 0

E) 1.111

68) According to Table 11-3, there are five activities in a PERT project. If the normal distribution were used to find the probability of finishing this project in 24 weeks or fewer, what mean and variance would be used?

A) 20 and 4.222

B) 30 and 5.222

C) 20 and 5.222

D) 30 and 4.222

E) 22.667 and 1.111

69) The critical path of a network is the

A) path with the least variance.

B) path with zero slack.

C) path with the most activities.

D) path with the largest variance.

E) None of the above

70) In a PERT network, the latest (activity) start time is the

A) earliest time that an activity can be finished without delaying the entire project.

B) latest time that an activity can be started without delaying the entire project.

C) earliest time that an activity can start without violation of precedence requirements.

D) latest time that an activity can be finished without delaying the entire project.

E) None of the above