Question 1

The manner in which units receive their service,such as FCFS,is the

Accepted Answer

A) queue discipline. 
B) channel. 
C) steady state. 
D) operating characteristic. 
A) queue discipline. 
B) channel. 
C) steady state. 
D) operating characteristic.

Question 2

Queue discipline refers to the assumption that a customer has the patience to remain in a slow moving queue.

Accepted Answer

A) True 
 B)False

Question 3

Little's flow equations

Accepted Answer

A) require Poisson and exponential assumptions. 
B) are applicable to any waiting line model. 
C) require independent calculation of W,L,Wq,and Lq. 
D) All of the alternatives are correct. 
A) require Poisson and exponential assumptions. 
B) are applicable to any waiting line model. 
C) require independent calculation of W,L,Wq,and Lq. 
D) All of the alternatives are correct.

Question 4

A multiple-channel system has more than one waiting line.

Accepted Answer

A) True 
 B)False

Question 5

The assumption of exponentially distributed service times indicates that

Accepted Answer

A) 37% of the service times are less than the mean service time. 
B) 50% of the service times are less than the mean service time. 
C) 63% of the service times are less than the mean service time. 
D) service time increase at an exponential rate as the waiting line grows. 
A) 37% of the service times are less than the mean service time. 
B) 50% of the service times are less than the mean service time. 
C) 63% of the service times are less than the mean service time. 
D) service time increase at an exponential rate as the waiting line grows.

Question 6

The Sea View Resort uses a multiple-channel queue registration system.If the average service time is 8 minutes,there are three registration clerks,and guests arrive at the rate of one every 5 minutes,find
a.$\lambda$ and $\mu$.
b.the probability all three clerks are idle.
c.the probability a guest will have to wait.
d.the average time a customer is in line.
e.the average number of customers in line.

Accepted Answer

a.@#LAT-DLM& = 12 per hour,@#LAT-DLM&= 7.5 per hou

Question 7

Little's flow equations indicate that the relationship of L to Lq is the same as that of W to Wq.

Accepted Answer

A) True 
 B)False

Question 8

Circle Electric Supply is considering opening a second service counter to better serve the electrical contractor customers.The arrival rate is 10 per hour.The service rate is 14 per hour.If the cost of waiting is $30 and the cost of each service counter is $22 per hour,then should the second counter be opened?

Accepted Answer

With one window the cost per h

Question 9

Queue discipline refers to the manner in which waiting units are arranged for service.

Accepted Answer

A) True 
 B)False

Question 10

For an M/G/1 system with $\lambda$= 20 and $\mu$ = 35,with  $\sigma$ = .005,find
a.the probability the system is idle.
b.the average length of the queue.
c.the average number in the system.

Accepted Answer

a.P₀ = .4

Question 11

Operating characteristics formulas for the single-channel queue do NOT require

Accepted Answer

A) $\lambda$ >$\mu$. 
B) Poisson distribution of arrivals. 
C) an exponential distribution of service times. 
D) an FCFS queue discipline. 
A) $\lambda$ >$\mu$. 
B) Poisson distribution of arrivals. 
C) an exponential distribution of service times. 
D) an FCFS queue discipline.

Question 12

The total cost for a waiting line does NOT specifically depend on

Accepted Answer

A) the cost of waiting. 
B) the cost of service. 
C) the number of units in the system. 
D) the cost of a lost customer. 
A) the cost of waiting. 
B) the cost of service. 
C) the number of units in the system. 
D) the cost of a lost customer.

Question 13

The arrival rate in queuing formulas is expressed as

Accepted Answer

A) the mean time between arrivals. 
B) the minimum number of arrivals per time period. 
C) the mean number of arrivals per channel. 
D) the mean number of arrivals per time period. 
A) the mean time between arrivals. 
B) the minimum number of arrivals per time period. 
C) the mean number of arrivals per channel. 
D) the mean number of arrivals per time period.

Question 14

What queue discipline is assumed by the waiting line models presented in the textbook?

Accepted Answer

A) first-come first-served. 
B) last-in first-out. 
C) shortest processing time first. 
D) No discipline is assumed. 
A) first-come first-served. 
B) last-in first-out. 
C) shortest processing time first. 
D) No discipline is assumed.

Question 15

Before waiting lines can be analyzed economically,the arrivals' cost of waiting must be estimated.

Accepted Answer

A) True 
 B)False

Question 16

The insurance department at Shear's has two agents,each working at a mean speed of 8 customers per hour.Customers arrive at the insurance desk at a mean rate of one every six minutes and form a single queue.
Management feels that some customers are going to find the wait at the desk too long and take their business to Word's,Shear's competitor.
In order to reduce the time required by an agent to serve a customer Shear's is contemplating installing one of two minicomputer systems: System A which leases for $18 per day and will increase an agent's efficiency by 25%;or,System B which leases for $23 per day and will increase an agent's efficiency by 50%.Agents work 8-hour days.
If Shear's estimates its cost of having a customer in the system at $3 per hour,determine if Shear's should install a new minicomputer system,and if so,which one.

Accepted Answer

No system: $49.20;Sy

Question 17

The time to process a registration at the Sea View Resort follows the exponential distribution and has a mean of 6 minutes.
a.What is the probability of a registration time shorter than 3 minutes?
b.What is the probability of a registration time shorter than 6 minutes?
c.What is the probability of a registration time between 3 and 6 minutes?

Accepted Answer

a.P(time < 3)= 1 - .6065 = .39

Question 18

If service time follows an exponential probability distribution,approximately 63% of the service times are less than the mean service time.

Accepted Answer

A) True 
 B)False

Question 19

A waiting line situation where every customer waits in the same line before being served by the same server is called a single server waiting line.

Accepted Answer

A) True 
 B)False

Question 20

For a single-channel waiting line,the utilization factor is the probability that an arriving unit must wait for service.

Accepted Answer

A) True 
 B)False

The manner in which units receive their service,such as FCFS,is the

Queue discipline refers to the assumption that a customer has the patience to remain in a slow moving queue.

Little's flow equations

A multiple-channel system has more than one waiting line.

The assumption of exponentially distributed service times indicates that

Little's flow equations indicate that the relationship of L to L_q is the same as that of W to W_q.

Queue discipline refers to the manner in which waiting units are arranged for service.

For an M/G/1 system with $\lambda$ = 20 and $\mu$ = 35,with $\sigma$ = .005,find a.the probability the system is idle. b.the average length of the queue. c.the average number in the system.

Operating characteristics formulas for the single-channel queue do NOT require

The total cost for a waiting line does NOT specifically depend on

The arrival rate in queuing formulas is expressed as

What queue discipline is assumed by the waiting line models presented in the textbook?

Before waiting lines can be analyzed economically,the arrivals' cost of waiting must be estimated.

If service time follows an exponential probability distribution,approximately 63% of the service times are less than the mean service time.

A waiting line situation where every customer waits in the same line before being served by the same server is called a single server waiting line.

For a single-channel waiting line,the utilization factor is the probability that an arriving unit must wait for service.

Introduction

Introduction to Probability

Probability Distributions

Decision Analysis

Utility and Game Theory

Forecasting

Introduction to Linear Programming

Lp Sensitivity Analysis and Interpretation of Solution

Linear Programming Applications

Distribution and Network Problems

Integer Linear Programming

Advanced Optimization Application

Project Scheduling: Pertcpm

Inventory Models

Simulation

Markov Processes

Filters

Exam 15: Waiting Line Models

The manner in which units receive their service,such as FCFS,is the

Queue discipline refers to the assumption that a customer has the patience to remain in a slow moving queue.

Little's flow equations

A multiple-channel system has more than one waiting line.

The assumption of exponentially distributed service times indicates that

Little's flow equations indicate that the relationship of L to Lq is the same as that of W to Wq.

Queue discipline refers to the manner in which waiting units are arranged for service.

For an M/G/1 system with λ\lambdaλ = 20 and μ\muμ = 35,with σ\sigmaσ = .005,find a.the probability the system is idle. b.the average length of the queue. c.the average number in the system.

Operating characteristics formulas for the single-channel queue do NOT require

The total cost for a waiting line does NOT specifically depend on

The arrival rate in queuing formulas is expressed as

What queue discipline is assumed by the waiting line models presented in the textbook?

Before waiting lines can be analyzed economically,the arrivals' cost of waiting must be estimated.

If service time follows an exponential probability distribution,approximately 63% of the service times are less than the mean service time.

A waiting line situation where every customer waits in the same line before being served by the same server is called a single server waiting line.

For a single-channel waiting line,the utilization factor is the probability that an arriving unit must wait for service.

Introduction

Introduction to Probability

Probability Distributions

Decision Analysis

Utility and Game Theory

Forecasting

Introduction to Linear Programming

Lp Sensitivity Analysis and Interpretation of Solution

Linear Programming Applications

Distribution and Network Problems

Integer Linear Programming

Advanced Optimization Application

Project Scheduling: Pertcpm

Inventory Models

Simulation

Markov Processes

Filters

Little's flow equations indicate that the relationship of L to L_q is the same as that of W to W_q.

For an M/G/1 system with $\lambda$ = 20 and $\mu$ = 35,with $\sigma$ = .005,find a.the probability the system is idle. b.the average length of the queue. c.the average number in the system.