MBA 603-M90 Fall 06 T3 Questions and Answers

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1. The critical path of a network is the

A) shortest time path through the network.

B) path with the fewest activities.

C) path with the most activities.

D) longest time path through the network.

E) None of the above

2. The first step in planning and scheduling a project is to develop the

A) employee scheduling plan.

B) PERT/CPM network diagram.

C) critical path.

D) work breakdown structure.

E) variance calculations for each activity.

3. Using the data in Table 13-4, what is the minimum possible time required for

completing the project?

(a)8

(b)12

(c)18

(d)10

(e)none of the above

4. Using the data in Table 13-4, 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

5. Using the data in Table 13-4, compute the slack time for activity D.

(a)0

(b)5

(c)3

(d)6

(e)none of the above

6. Consider a project that has an expected completion time of 50 weeks and a standard

deviation of 9 weeks. What is the probability that the project is finished in 57 weeks or

fewer? (Round to two decimals.)

(a)0.68

(b)0.78

(c)0.22

(d)0.32

(e)none of the above

The following table provides information for the next two questions.

7. Which activities are part of the critical path?

(a)A, B, E, G, H

(b)A, C, E, G, H

(c)A, D, G, H

(d)B, F, H

(e)none of the above

8. What is the variance of the critical path?

(a)5.222

(b)4.364

(c)1.362

(d)5.144

(e)none of the above

9. According to the information provided in Table 14-1, on average, how many units are

in the line?

(a)0.643

(b)2.191

(c)2.307

(d)0.217

(e)0.905

10. According to the information provided in Table 14-1, what proportion of time is at

least one server busy?

(a)0.643

(b)0.905

(c)0.783

(d)0.091

(e)none of the above

11. Using the information provided in Table 14-1 and counting each person being served

and the people in line, on average, how many people would be in this system?

(a)0.905

(b)2.191

(c)6.037

(d)14.609

(e)none of the above

12. According to the information provided in Table 14-1, what is the average time spent

by a person in this system?

(a)0.905 minutes

(b)2.191 minutes

(c)6.037 minutes

(d)14.609 minutes

(e)none of the above

13. According to the information provided in Table 14-1, what percentage of the total

available service time is being used?

(a)90.5%

(b)21.7%

(c)64.3%

(d)It could be any of the above, depending on other factors.

(e)none of the above

14. According to the information provided in Table 14-5, which presents the solution for

a queuing problem with a constant service rate, on average, how much time is spent

waiting in line?

(a)1.607 minutes

(b)0.714 minutes

(c)0.179 minutes

(d)0.893 minutes

(e)none of the above

15. According to the information provided in Table 14-5, which presents the solution for

a queuing problem with a constant service rate, on average, how many customers are

in the system?

(a) 0.893

(b)0.714

(c)1.607

(d)0.375

(e)none of the above

16. According to the information provided in Table 14-5, which presents a queuing

problem solution for a queuing problem with a constant service rate, on average, how

many customers arrive per time period?

(a) 5

(b) 7

(c) 1.607

(d) 0.893

(e) none of the above

17. According to Table 15-2, the number of arrivals in any 10-minute period is between 6

and 10, inclusive. Suppose the next three random numbers were 18, 89, and 67, and

these were used to simulate arrivals in the next three 10-minute intervals. How many

customers would have arrived during this 30-minute time period?

(a)22

(b)23

(c)24

(d)25

(e)none of the above

18. According to Table 15-2, the number of arrivals in any 10-minute period is between

6 and 10, inclusive. Suppose the next three random numbers were 20, 50, and 79, and

these were used to simulate arrivals in the next three 10-minute intervals. How many

customers would have arrived during this 30-minute time period?

(a)18

(b)19

(c)20

(d)21

(e)none of the above

19. According to Table 15-2, the number of arrivals in any 10-minute period is between 6

and 10 inclusive. Suppose the next 3 random numbers were 02, 81, and 18. These

numbers are used to simulate arrivals into the pharmacy. What would the average

number of arrivals per 10-minute period be based on this set of occurrences?

(a) 6

(b)7

(c)8

(d)9

(e)none of the above

20. According to Table 15-3, the time between successive arrivals is 1, 2, 3, or 4 minutes.

If the store opens at 8:00a.m. and random numbers are used to generate arrivals, what

time would the first customer arrive if the first random number were 02?

(a)8:01

(b)8:02

(c)8:03

(d)8:04

(e)none of the above

21. According to Table 15-3, the time between successive arrivals is 1, 2, 3, or 4 minutes.

The store opens at 8:00a.m. and random numbers are used to generate arrivals and

service times. The first random number to generate an arrival is 39, while the first

service time is generated by the random number 94. What time would the first

customer finish transacting business?

(a)8:03

(b)8:04

(c)8:05

(d)8:06

(e)none of the above

22. According to Table 15-3, the time between successive arrivals is 1, 2, 3, or 4 minutes.

The store opens at 8:00a.m. and random numbers are used to generate arrivals and

service times. The first 3 random numbers to generate arrivals are 09, 89, and 26.

What time does the third customer arrive?

(a)8:07

(b)8:08

(c)8:09

(d)8:10

(e)none of the above

23. According to Table 15-3, the time between successive arrivals is 1, 2, 3, or 4 minutes.

The store opens at 8:00a.m. and random numbers are used to generate arrivals and

service times. The first two random numbers for arrivals are 95 and 08. The first two

random numbers for service times are 92 and 18. At what time does the second

customer finish transacting business?

(a)8:07

(b)8:08

(c)8:09

(d)8:10

(e)none of the above

24. According to Table 15-4, which presents a summary of the Monte Carlo output from

a simulation of 200 runs, there are 5 possible values for the variable of concern. If

this variable represents the number of machine breakdowns during a day, what is the

probability that the number of breakdowns is 2 or fewer?

(a)0.23

(b)0.31

(c)0.32

(d)0.63

(e)none of the above

25. According to Table 15-4, which presents a summary of the Monte Carlo output from

a simulation of 200 runs, there are 5 possible values for the variable of concern. If

this variable represents the number of machine breakdowns during a day, what is the

probability that the number of breakdowns is more than 4?

(a)0

(b)0.08

(c)0.09

(d)1.00

(e)none of the above

26. According to Table 15-4, which presents a summary of the Monte Carlo output from

a simulation of 200 runs, there are 5 possible values for the variable of concern. If

this variable represents the number of machine breakdowns during a day, based on

this simulation run, what is the average number of breakdowns per day?

(a)2.00

(b)2.10

(c)2.50

(d)200

(e)none of the above