Question 1.1.

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

(Points : 4)

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

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

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

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

None of the above

Question 2.2.

PERT and CPM are quantitative analysis tools designed to schedule and control large projects.

(Points : 4)

True

False

Question 3.3.

The expected time in PERT is

(Points : 4)

a weighted average of the most optimistic time, most pessimistic time, and four times the most likely time.

the modal time of a beta distribution.

a simple average of the most optimistic, most likely, and most pessimistic times.

the square root of the sum of the variances of the activities on the critical path.

None of the above

Question 4.4.

On a practical note — if we are using waiting line analysis to study customers calling a telephone number for service, balking is probably not an issue.

(Points : 4)

True

False

Question 5.5.

An arrival in a queue that reneges is one who

(Points : 4)

after joining the queue, becomes impatient and leaves.

refuses to join the queue because it is too long.

goes through the queue, but never returns.

jumps from one queue to another, trying to get through as quickly as possible.

None of the above

Question 6.6.

PERT was developed for a project for which activity or task times were uncertain.

(Points : 4)

True

False

Question 7.7.

The following represents a project with four activities. All times are in weeks.

Activity

Immediate

Predecessor

Optimistic

Time

Most

Likely

Time

Pessimistic

Time

A

–

2

8

14

B

–

8

8

8

C

A

6

9

18

D

B

5

11

17

According to the data in Table above, what is the minimum expected completion time for the project?

(Points : 4)

18

19

37

11

None of the above

Question 8.8.

A suburban specialty restaurant has developed a single drive-thru window. Customers order, pay, and pick up their food at the same window. Arrivals follow a Poisson distribution while service times follow an exponential distribution. If the average number of arrivals is 6 per hour and the service rate is 2 every 15 minutes, what is the average number of customers waiting in line behind the person being served?

(Points : 4)

0.50

0.75

2.25

3.00

None of the above

Question 9.9.

Given the following small project, the critical path is ________ days. (Points : 4)

Activity

Immediate

Predecessor

Time

(days)

A

–

10

B

–

4

C

A, B

6

10

14

16

20

None of the above

Question 10.10.

The study of waiting lines is called queuing theory.

(Points : 4)

True

False

Question 11.11.

Slack is the time an activity can be delayed without impacting the completion time of the project.

(Points : 4)

True

False

Question 12.12.

CPM was developed for use in managing projects about which we have good information about activity or task completion times.

(Points : 4)

True

False

Question 13.13.

In queuing analysis, total expected cost is the sum of expected ________ plus expected ________.

(Points : 4)

service costs, arrival costs

facility costs, calling costs

calling cost, inventory costs

calling costs, waiting costs

service costs, waiting costs

Question 14.14.

One of the most significant benefits of PERT is that it forces the project manager to sit down and plan the project in great detail—and thus come to an understanding of relationships between the activities.

(Points : 4)

True

False

Question 15.15.

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

Activity

Immediate

Predecessor

Time

(days)

A

–

8

B

A

4

C

–

10

(Points : 4)

4

10

12

22

None of the above

Question 16.16.

A bank with a single queue to move customers to several tellers is an example of a single-channel system.

(Points : 4)

True

False

Question 17.17.

Slack time in a network is the

(Points : 4)

amount of time that an activity would take assuming very unfavorable conditions.

shortest amount of time that could be required to complete the activity.

amount of time that you would expect it would take to complete the activity.

difference between the expected completion time of the project using pessimistic times and the expected completion time of the project using optimistic times.

amount of time that an activity can be delayed without delaying the entire project.

Question 18.18.PERT is a deterministic analysis tool allowing for precise times of activities within a project.(Points : 4)

True

False

Question 19.19.

Given an activity’s optimistic, most likely, and pessimistic time estimates of 2, 5, and 14 days respectively, compute the PERT expected activity time for this activity.

(Points : 4)

6

7

9

5

None of the above

Question 20.20.

Frequently in queuing problems, the number of arrivals per unit of time can be estimated by a probability distribution known as the Poisson distribution.

(Points : 4)

True

False

Question 21.21.

The customer who arrives at a bank, sees a long line, and leaves to return another time is

(Points : 4)

balking.

cropping.

reneging.

blithering.

None of the above

Question 22.22.

A goal of many waiting line problems is to help a firm find the ideal level of services that minimize the cost of waiting and the cost of providing the service.

(Points : 4)

True

False

Question 23.23.

Lines at banks where customers wait for a teller window are usually representative of a

(Points : 4)

single-channel, multiphase system.

single-channel, single-phase system.

multichannel, multiphase system.

multichannel, single-phase system.

None of the above

Question 24.24.

One difficulty in waiting line analysis is that it is sometimes difficult to place a value on customer waiting time.

(Points : 4)

True

False

Question 25.25.

Given an activity’s optimistic, most likely, and pessimistic time estimates of 4, 6, and 14 days respectively, compute the PERT expected activity time for this activity.

(Points : 4)

8

6

7

9

None of the above