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51 Cards in this Set
 Front
 Back
The case in which arriving customers refuse to join the waiting line

Balking


The population of items from which arrivals at the queing system come.

Calling Population


A queue discipline (meaning firstin, firstout) in which the customers are served in the strict order of arrival

FIFO


A method of classifying queuing systems based on the distribution of arrivals, the distribution of service times, and the number of service channels.

Kendall Notation


A case in which the number of customers in the system is a significant proportion of the calling population

Limited or Finite Population


A waiting line that cannot increase beyond a specific size.

Limited Queue Length


A set of relationships that exist for any queuing system in a steady state.

Little's Equations


Kendall notation for the constant service time model.

M/D/1


Kendall notation for the multichannel queuing model (with m servers) and Poisson arrivals and exponential service times

M/M/m


Kendall notation for the singlechannel model with Poisson arrivals and exponential service times.

M/M/1


A system that has more than one service facility, all fed by the same single queue.

Multichannel Queuing System


A system in which service is received from more than one station, one after the other

Multiphase System


A probability distribution that is often used to describe random service times in a service system

Negative Exponential Probability Distribution


Descriptive characteristics of a queuing system, including the average number of customers in a line and in the system, the average waiting times in a line and in the system, and percent idle time

Operating Characteristics


A probability distribution that is often used to describe random arrivals in a queue.

Poisson Distribution


The rule by which customers in a line receive service

Queue Discipline


The mathematical study of waiting lines or queues

Queuing Theory


The case in which customers enter a queue but then leave before being serviced

Reneging


The cost of providing a particular level of service

Service cost


A system with one service facility fed by one queue

Singlechannel Queuing System


A queuing system in which service is received at only one station

Singlephase system


The normal, stabilized operation condition of a queuing system

Steady state


The initial condition of a queuing system before a steady state is reached

Transient state


A calling population that is very large relative to the number of customers currently in the system

Unlimited or Infinite Population


A queue that can increase to an infinite size

Unlimited Queue Length


The proportion of the time that service facilities are in use

Utilization Factor


The cost to the firm of having customers or objects waiting to be serviced

Waiting Cost


One or more customers or objects waiting to be served

Waiting Line(Queue)


A simulation model in which the system status is updated at specific intervals of time

Fixed time Increment Model


A graphical means of presenting the logic of a simulation model. It is a tool that helps in writing a simulation computer program

Flow Diagram or flowchart


Computer programming languages, such as Visual Basic, C++, or java, that are used to simulate a problem

GeneralPurpose languages


Simulations that experiment with probabilistic elements of a system by generating random numbers to create values for those elements

Monte Carlo Simulation


A simulation model in which the system status is updated whenever the next event occurs

Next Event Time Increment Model


The use of simulation in competitive situations such as military games and business or management games

Operational Gaming


These graphical programs are prestructured to handle a variety of situations

Prewritten Simulation Programs


A number whose digits are selected completely at random

Random Number


A range of random numbers assigned to represent a possible simulation outcome.

Random Number Interval


A quantitative analysis technique that involves building a mathematical model that represents a realworld situation. The model is then experimented with to estimate the effects of various actions and decisions

Simulation


Programming languages especially designed to be efficient in handling simulation problems. The category includes GPSS/H, SIMSCRIPT II.5, and SLAM II

SpecialPurpose Simulation Languages


Simulation models dealing with the dynamics of large organizational or governmental systems.

Systems Simulation


The process of comparing a model to the real system that it represents to make surethat it is accurate

Validation


The process of determining that the computer model is internally consistent and following the logic of the conceptual model

Verification


A state that, when entered, cannot be left. The probability of going from an absorbing state to any other state is 0.

Absorbing State


A condition that exists whent he state probabilities for a future period are the same as the state probabilities for a future period are the same as the state probabilities for a previous period

Equilibrium Condition


A matrix that is the inverse of the I minus B matrix. It is needed to compute the equilibrium conditions when absorbing states are involved.

Fundamental Matrix


The fraction of the population that shops at a particular store or market. When expressed as a fraction, market shares can be used in a place of state probabilities

Market Share


A type of analysis that allows us to predict the future by using the state probabilities and the matrix of transition probabilities

Markov Analysis


A matrix containing all transition probabilities for a certain process or system

Matrix of Transition Probabilities


The probability of an event occuring at a point in time. Examples include the probability that a person will be shopping at a given grocery store during a given month.

State Probability


The conditional probability that we will be in a future state given a current or existing state.

Transition Probability


A collection or vector of all state probabilities for a given system or process. The vector of state probabilities could be the initial state or future state.

Vector of State Probabilities
