Question 1

The symbol ρ is used to denote which one of the following parameters:

Accepted Answer

A)  number of customers in the system. 
B)  number of servers. 
C)  traffic intensity. 
D)  finite size of queue.

Question 2

The average time a customer should expect to wait can be calculated using just the mean arrival rate and the mean service rate.

Accepted Answer

A) True 
 B)False

Question 3

In analytical terms, the modern self-serve supermarket would be approximated best by the M/M/C model, where C is the number of servers.

Accepted Answer

A) True 
 B)False

Question 4

A system is said to be in statistical equilibrium when the number in queue assumes a distribution that is independent of the starting condition.

Accepted Answer

A) True 
 B)False

Question 5

A parking lot is a special variation of the _________ queuing model.

Accepted Answer

A)  infinite queue M/G/∞ 
B)  finite-queue M/M/c 
C)  infinite queue M/M/c 
D)  finite-queue M/G/1

Question 6

A system is said to be in a transient state when the values of its governing parameters in this state are expected to change uncontrollably with time.

Accepted Answer

A) True 
 B)False

Question 7

For a standard service system to operate over the long run, the servers must be idle part of the time.

Accepted Answer

A) True 
 B)False

Question 8

All but one of the following need to be analyzed for capacity requirements when setting up a "Cookies and Ice Cream" shop:

Accepted Answer

A)  technology requirements. 
B)  facility requirements. 
C)  equipment requirements. 
D)  labor requirements.

Question 9

Capacity usually is measured in terms of outputs (e.g. guest nights) rather than inputs (e.g. number of hotel rooms) in service firms.

Accepted Answer

A) True 
 B)False

Question 10

The cost of service capacity is determined by

Accepted Answer

A)  the number of customers waiting. 
B)  the total number of customers. 
C)  waiting time. 
D)  the number of servers on duty.

Question 11

In general, for infinite queues, the expected number of people in the system is equal to:

Accepted Answer

A)  the average arrival rate minus the average service rate. 
B)  the expected number in the queue plus the expected number in service. 
C)  the expected arrival rate times the expected waiting time. 
D)  alternatives (a) and (b) above.

Question 12

In the equation LS = LQ + ρ, ρ refers to:

Accepted Answer

A)  number of servers. 
B)  traffic density. 
C)  mean number of customers being served. 
D)  number of customer that have been served.

Question 13

For the system to operate satisfactorily over the long run,

Accepted Answer

A)  the capacity to serve must be greater than the average demand. 
B)  the expected waiting time for each customer must not exceed average service time. 
C)  the arrival rate must be less than the service rate. 
D)  the number of servers must equal the average number of arrivals per unit time.

Question 14

Reducing the variability either in service time or arrival time can reduce most of the waiting involved for the consumers.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following is not true of pseudo-random numbers?

Accepted Answer

A)  They exhibit the characteristics of true random numbers. 
B)  They are generated using a mathematical function. 
C)  They are stored in a computer file. 
D)  An identical sequence can be replicated with the same seed value.

Question 16

A queuing system is described by all but one of the following:

Accepted Answer

A)  balking behavior 
B)  calling population 
C)  arrival process 
D)  queue configuration

Question 17

A shortcoming of simulation is the use of pseudo-random numbers.

Accepted Answer

A) True 
 B)False

Question 18

All but one of the following are advantages of using one large computer system to serve an entire university community:

Accepted Answer

A)  short turnaround time. 
B)  large memory. 
C)  economics of scale in services. 
D)  short wait in queue.

Question 19

Which of the following is not a criterion for capacity planning?

Accepted Answer

A)  average customer waiting time 
B)  probability of excessive waiting 
C)  the rate of departure 
D)  probability of sales lost because of inadequate waiting area

Question 20

Little's Law states that a relationship exists between

Accepted Answer

A)  line length and waiting time. 
B)  multiple and single queues. 
C)  waiting in queue and waiting in system. 
D)  exponential time between arrivals and Poisson arrival rate.

Exam 13: Capacity Planning and Queuing Models

The symbol ρ is used to denote which one of the following parameters:

The average time a customer should expect to wait can be calculated using just the mean arrival rate and the mean service rate.

In analytical terms, the modern self-serve supermarket would be approximated best by the M/M/C model, where C is the number of servers.

A system is said to be in statistical equilibrium when the number in queue assumes a distribution that is independent of the starting condition.

A parking lot is a special variation of the _________ queuing model.

A system is said to be in a transient state when the values of its governing parameters in this state are expected to change uncontrollably with time.

For a standard service system to operate over the long run, the servers must be idle part of the time.

All but one of the following need to be analyzed for capacity requirements when setting up a "Cookies and Ice Cream" shop:

Capacity usually is measured in terms of outputs (e.g. guest nights) rather than inputs (e.g. number of hotel rooms) in service firms.

The cost of service capacity is determined by

In general, for infinite queues, the expected number of people in the system is equal to:

In the equation L_S = L_Q+ ρ, ρ refers to:

For the system to operate satisfactorily over the long run,

Reducing the variability either in service time or arrival time can reduce most of the waiting involved for the consumers.

Which of the following is not true of pseudo-random numbers?

A queuing system is described by all but one of the following:

A shortcoming of simulation is the use of pseudo-random numbers.

All but one of the following are advantages of using one large computer system to serve an entire university community:

Which of the following is not a criterion for capacity planning?

Little's Law states that a relationship exists between