QUEUING THEORY

Question 1

Provides ways of assessing impacts of activities by knowing the magnitude of vehicular delay and extent of queue propagated

Answer 1

Queuing Analysis

Question 2

Queuing Analysis: Provides ways of assessing impacts of activities by knowing the _______ of vehicular delay and _______ of queue propagated

Answer 2

Magnitude
Extent

Question 3

Queuing Analysis models are derived on assumptions related to ___________ and prevailing __________

Answer 3

Arrival and Departure Patterns
Queue Discipline

Question 4

A parameter that explains how the customers arrive at a service facility

Answer 4

Queue Discipline

Question 5

Customers are served in the order of their arrival

Answer 5

First in First Out (FIFO)

Question 6

Customers are served in reversed order of entry

Answer 6

First in Last Out (FILO)

Question 7

Customers are selected for service at random irrespective of arrival in the service system

Answer 7

Served In Random Order (SIRO)

Question 8

Customers are grouped in priority classes on the basis of some attributes (Service Time, Urgency, Identifiable Characteristics)

Answer 8

Priority Service

Question 9

Server is switched between all queues for a predefined slice (quantum) of time in a round-robin manner

Answer 9

Processor (Time) Sharing

Question 10

Each queue head is served for that specific time

Answer 10

Processor (Time) Sharing

Question 11

Used to avoid server time killed by customer for external activities

Answer 11

Processor (Time) Sharing

Question 12

Characterized by arrival patterns given by arrival distribution

Answer 12

Input

Question 13

Depends on queue discipline and service mechanism at the service station

Answer 13

Output

Question 14

Manner customers are served at the station

Answer 14

Service Mechanism

Question 15

Popularly used to describe a queuing system

Answer 15

Kendall’s Notation
A/B/C (n)

Question 16

Arrival and Departure Patterns follow

Answer 16

Markov (M) or Deterministic (D)

Question 17

Random process or non-uniform distributions

Answer 17

Markov (M)

Question 18

Processes characterized by regular or constant (uniform) arrivals or departure distribution

Answer 18

Deterministic (D)

Question 19

Models of Traffic Distribution

Answer 19

Uniform Distribution (Deterministic)
Poisson Distribution (Non-Uniform)
Negative Exponential Distribution

Question 20

Assumes all vehicles arrive equally or are uniformly spaced

Answer 20

Uniform Distribution (Deterministic)

Question 21

Assumes that vehicles arrive at random

Answer 21

Possion Distribution (Non Uniform)

Question 22

Assumption of Poisson vehicle arrivals also implies a distribution of tie intervals between arrivals of successive vehicles (time headway)

Answer 22

Negative Exponential Distribution

Question 23

Regular arrivals and departures with single server; limit queue is at 100

Answer 23

D/D/1

Question 24

Arrival and departure are easily represented by straight lines with slope corresponding to their rates (flow)

Answer 24

D/D/1

Question 25

Assumes that arrivals follow a negative exponential distribution (random) and regular departures; has a single server

Answer 25

M/D/1

Question 26

Traffic density of M/D/1

Answer 26

Rho = Lamda/Mu

Question 27

Utilization factor of M/D/1

Answer 27

Rho = Lamda/Mu

Question 28

Random arrival and departure (service rates)

Answer 28

M/M/1

Question 29

Negative exponential distribution for both arrival and departure

Answer 29

M/M/1

Question 30

Random arrival and departure/ Multiple Servers/

Answer 30

M/M/N

Question 31

Traffic density of M/M/N

Answer 31

Rho = Lamda/Mu

Question 32

Utilization factor of M/M/N

Answer 32

Rho/N