Final Exam Review

Customers arrive at a grocery store following a Poisson distribution at an average rate of 70 per hour. On average, how many customers arrive per minute? A) 1.2 customers per minute B) 7 customers per minute C) 0.86 customers per minute D) 0.02 customers per minute E) 0.7 customers per minute

Answer: A

In a drive-in fast food restaurant, customers form a single lane, place their order and pay their bill at one window, and then pick up their food at a second window. This queuing configuration is referred to as: A) single-server, multiphase system B) multiple-server, multiphase system C) multiple-server, single-phase system D) single-server, single-phase system E) single-server, parallel phase system

Answer: A

John Smith is planning to refinance his home mortgage to take advantage of the lower current interest rates. As part of the refinancing application, the bank needs to appraise Mr. Smith's home. Mr. Smith expects an appraisal of at least $175,000 but no more than $250,000. All values between $175,000 and $250,000 have the same probability of being the actual appraised value. What is the appropriate distribution for simulating appraisal values? A) continuous uniform B) triangular C) binomial D) discrete uniform E) normal

Answer: A

Refer to the figure. How long will take to complete the project? A) 15 days B) 14 days C) 13 days D) 12 days E) 11 days

Answer: A

Refer to the figure. What are the immediate predecessor(s) of activity D? A) B and C B) B C) C D) C and E E) B and E

Answer: A

The sum of all previous probabilities up to the current probability is the ________. A) cumulative probability B) conditional probability C) marginal probability D) prior probability E) posterior probability

Answer: A

What are output measures called in Crystal Ball? A) forecasts B) decisions C) assumptions D) random variables E) cell preferences

Answer: A

A queuing system has an arrival rate of 5 customers per hour and a service rate of 8 customers per hour. You decide to build a simulation model to describe the service time per customer. The best appropriate distribution to use is: A) triangular B) exponential C) normal D) binomial E) discrete uniform

Answer: B

A service system has a constant service time, Poisson arrival rates and 1 server. What is the Kendall notation for this system? A) M/M/1 B) M/D/1 C) M/G/1 D) D/M/1 E) G/M/1

Answer: B

Refer to the figure. What is the slack time, in days, associated with activity D? A) 0 B) 1 C) 2 D) 3 E) 4

Answer: B

Refer to the table. What is the appropriate distribution for the variable "Number of car rentals"? A) continuous uniform B) discrete uniform C) normal D) binomial E) triangular

Answer: B

The average time each customer spends in the queue is referred to as: A) W B) Wq C) L D) Lq E) ρ

Answer: B

Refer to the figure. What are the immediate successor(s) of activity C? A) D B) E C) D and E D) A E) B and D

Answer: C

Refer to the figure. What is the slack time, in days, associated with activity E? A) 1 B) 2 C) 0 D) 3 E) 4

Answer: C

Refer to the figure. What is the standard deviation associated with the completion time of activity B? A) 0.1111 B) 0.2222 C) 0.3333 D) 2 E) 5

Answer: C

Reneging refers to customers who: A) do not join a queue B) switch queues C) join a queue but abandon their shopping carts before checking out D) join a queue but are dissatisfied E) join a queue and complain because of long lines

Answer: C

The Excel function =RAND() generates random numbers that are: A) greater than 0 B) less than 1 C) between 0 and 0.9999 D) between -1 and 1 E) greater than 1

Answer: C

What is the correct distribution for simulating the outcome of a single coin? A) continuous uniform B) triangular C) binomial D) exponential E) normal

Answer: C

A five-star hotel accepts 100 room reservations daily. For each reservation accepted, there is a 7% chance that the guest will not arrive. You decide to build a simulation model to describe the number of guests who will show up. The best appropriate distribution to use is: A) normal B) continuous uniform C) discrete uniform D) binomial E) triangular

Answer: D

Consider the following Activity-On-Node (AON) project (activity completion times are in days). 1) Refer to the figure. What is the critical path? A) ABDF B) ABEF C) ACDF D) ACEF E) none of the above

Answer: D

Refer to the figure. Determine the latest start time (LST) and latest finish time (LFT) of activity B. A) LST = 9, LFT = 5 B) LST = 5, LFT = 9 C) LST = 8, LFT = 4 D) LST = 4, LFT = 8 E) LST = 8, LFT = 10

Answer: D

This queuing system configuration is referred to as a: A) single-server, multiphase system B) multiple-server, multiphase system C) multiple-server, single-phase system D) single-server, single-phase system E) single-server, parallel phase system

Answer: D

What distribution is appropriate for simulating the event of rolling a single die? A) continuous uniform B) triangular C) binomial D) discrete uniform E) normal

Answer: D

Which of the following is considered a disadvantage of simulation? A) Simulation models do not allow for time compression. B) Simulation models do not allow for what-if analysis. C) Simulation models cannot emulate real systems. D) Simulation models do not generate optimal solutions. E) Simulation models are not unique.

Answer: D

A beauty salon employs three hairdressers. All customers get their hair washed in one area of the salon before being taken to another area to get their hair cut. Customer arrival rate and service time follows the Poisson and exponential distributions, respectively. What is the Kendall notation for this system? A) M/M/1 B) D/M/3 C) M/D/3 D) M/G/3 E) M/M/3

Answer: E

A queuing system has an arrival rate of 5 customers per hour and a service rate of 8 customers per hour. What is the utilization factor (ρ) of the system? A) 40 B) 1.6 C) 4 D) 5 E) 0.625

Answer: E

Refer to the figure. Suppose that additional resources are provided to crash the project completion time below its expected normal completion time. Which activities would be potential candidates for crashing? A) B B) D C) A and B D) A and D E) F

Answer: E

Refer to the figure. What is the earliest start time (EST) and earliest finish time (EFT) of activity E? A) EST = 7, EFT = 10 B) EST = 10, EFT = 7 C) EST = 11, EFT = 8 D) EST = 8, EFT = 10 E) EST = 8, EFT = 11

Answer: E

Refer to the table. What is the appropriate distribution for the variable "Monthly operating costs"? A) continuous uniform B) discrete uniform C) normal D) binomial E) triangular

Answer: E

Refer to the table. What is the appropriate equation for cell B5? A) =B2 - B4 B) =B3 - B4 C) =B4 - B2*B3 D) =B4 - B3*B2 E) =(B2*B3) - B4

Answer: E

The technique of randomly generating values for unknown elements in a model using random sampling is known as ________. A) optimization B) Markov analysis C) discrete-event simulation D) simulation gaming E) Monte Carlo simulation

Answer: E