Preview

A Queuing System

Good Essays
Open Document
Open Document
773 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
A Queuing System
A study of queuing system
Queueing theory is the mathematical study of waiting lines, or queues. The theory enables mathematical analysis of several related processes, including arriving at the (back of the) queue, waiting in the queue (essentially a storage process), and being served at the front of the queue. The theory permits the derivation and calculation of several performance measures including the average waiting time in the queue or the system, the expected number waiting or receiving service, and the probability of encountering the system in certain states, such as empty, full, having an available server or having to wait a certain time to be served.
Queueing theory has applications in diverse fields,[1] including telecommunications,[2] traffic engineering, computing[3] and the design of factories, shops, offices and hospitals.[4]
The word queue comes, via French, from the Latin cauda, meaning tail. The spelling "queueing" over "queuing" is typically encountered in the academic research field. In fact, one of the flagship journals of the profession is named "Queueing Systems".
Queueing theory is generally considered a branch of operations research because the results are often used when making business decisions about the resources needed to provide service. It is applicable in a wide variety of situations that may be encountered in business, commerce, industry, healthcare,[5] public service and engineering. Applications are frequently encountered in customer service situations as well as transport and telecommunication. Queueing theory is directly applicable to intelligent transportation systems, call centers, PABXs, networks, telecommunications, server queueing, mainframe computer of telecommunications terminals, advanced telecommunications systems, and traffic flow.
Notation for describing the characteristics of a queueing model was first suggested by David G. Kendall in 1953. Kendall's notationintroduced an A/B/C queueing notation that can be

You May Also Find These Documents Helpful

  • Satisfactory Essays

    NT1230 Lab 10

    • 1546 Words
    • 8 Pages

    6. In the Instances of selected object list, select 0, and then click Add. The Queue Length counter appears in the Added counters list.…

    • 1546 Words
    • 8 Pages
    Satisfactory Essays
  • Satisfactory Essays

    BSOP 429 Midterm Exam 1

    • 375 Words
    • 2 Pages

    3. (TCO 3) In order to minimize the number of orders waiting in the queue and maximize the number of orders processed in a center, which of the following rules should be used?…

    • 375 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    The simulation provides a baseline of wait times that average 11 minutes. These lie far above the upper tolerance level for this simulation, as well as, for those in Figures 1 and 2 research.…

    • 920 Words
    • 4 Pages
    Good Essays
  • Satisfactory Essays

    BSOP429 MIDTERM

    • 317 Words
    • 2 Pages

    Question 3. 3. (TCO 3) In order to minimize the number of orders waiting in the queue and maximize the number of orders processed in a center, which of the following rules should be used? (Points : 5)…

    • 317 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Queues form due to variability in arrival times, service times & service availability. Impact of variability increases as utilization increases! (throughput goes up or capacity goes down).…

    • 778 Words
    • 3 Pages
    Good Essays
  • Better Essays

    Little field

    • 1749 Words
    • 7 Pages

    Management’s main concern is managing the capacity of the factory in response to the complex demand pattern. Delays resulting from insufficient capacity undermine LT’s promised lead times and ultimately force LT to turn away orders. In particular, if an order’s lead time exceeds the quoted lead time, then the revenue for that order decreases linearly, from $1000 for the quoted lead time (24 hours) to $0 for the maximum lead time (72 hours).…

    • 1749 Words
    • 7 Pages
    Better Essays
  • Satisfactory Essays

    In the Capacity Management game, students can buy and sell machines at each of the three workstations. They can also change the way Station 2 (the testing station) is scheduled. They can choose first-in-first-out (FIFO), give priority to step 2 or give priority to step 4. The purpose of this assignment is for students to utilize queuing concepts and forecasting methods to manage capacity. This game takes 7 days.…

    • 343 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    The arrival rate (lambda) is rate at which customers arrive at service facility during a specified period. Estimated from empirical data derived from studying the system or a similar system, or it can be an average of these empirical data. Arrivals are assumed to be independent of each other and vary randomly over time. We assume there is no balking (refusing to join a line), reneging (leaving a line), or jockeying (changing lines) by customers in the waiting line system. We also assume that arrival late is less than service rate (or else line would grow infinitely long). Queue discipline → order in which customers are served. Most common type: first-come, first-serve. We also have last-in, first-out. Random queue. Prearranged schedule. Alphabetical order. Shortest expected processing times. Most critical problem. Two types of queue sizes: infinite or finite. Infinite could be of any size with no upper limit (most common size). Finite is limited in size.…

    • 780 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    Simul8 Report

    • 1272 Words
    • 6 Pages

    Figure 1 depicts the model used for the simulation, where the two types of calls enter the system through the two entry points - type 1 and type 2. They are then sorted and routed out to their respective queues through labels named ‘type’. Type 1 customers are served by either agent 1 or agent 3 (generalist), depending on availability. Similarly, type 2 customers are served by agent 2 or agent 3, after which the customers leave the system by their respective exit points.…

    • 1272 Words
    • 6 Pages
    Powerful Essays
  • Good Essays

    To begin with, the most unaccepted behavior is cutting line (Scenario 3). Cutting line is the only scenario getting the point below 1.5 in all ten points and the analysts indicated that this will be the activity they are very unlikely to do in both homeland and vacation (Fig.1). The reason may due to the social norms. An article showed that ‘first come first served’ preference is the elementary idea of queuing and this is a relatively justice behavior, so it become a social norm or practice while dealing with crowd. Therefore, jumping the queue is unacceptable and is aggressively banned. ( Allon & Hanany, 2012). As a result, queuing become a hidden…

    • 504 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Skill Builder# 4

    • 489 Words
    • 2 Pages

    (4) There are two service windows and two employees. There is a separate queue for each of the service windows. Newly arriving customers randomly choose one of two queues. The employee stationed at each window fills the order and takes the money for customers arriving at that window. The average service time for each service window is 2 minutes.…

    • 489 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Bat Case Report

    • 1216 Words
    • 5 Pages

    BOP Team 1 is consists of 8 customer service technicians and the arrival rate of customers is 22.5 customers/hour. The average time to deal with one customer is 18.2 minutes. Therefore, the service rate capacity per technician is 3.2967 customers/hour. After running the Steady-State, Infinite Capacity Queues model, the average waiting time of customers is 0.14979 hour, which equals to about 9 minutes and there will be in average 3.37 customers waiting in the queue. Please refer to Appendix 1 for details.…

    • 1216 Words
    • 5 Pages
    Good Essays
  • Satisfactory Essays

    Operations Management

    • 594 Words
    • 3 Pages

    Lq= 4^2 / 6 (6-4) = 16/ 12= 1.33 student waiting in line on average.…

    • 594 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    1 Introduction to Simulation 2 Simulation Examples 3 General Principles 4 Simulation Software 5 Statistical Models in Simulation 6 Queueing Models 7 Random-Number Generation 8 Random-Variate Generation 9 Input Modeling 10 Verification and Validation of Simulation Models 11 Output Analysis for a Single Model 12 Comparison and Evaluation of Alternative System Designs 13 Simulation of Manufacturing and Material Handling Systems 14 Simulation of Computer Systems 1 5 16 17 18 32 39 46 51 55 57 60 65 66…

    • 17067 Words
    • 69 Pages
    Good Essays
  • Good Essays

    Many services are delivered in real time. Customers have to be physically present to receive service from organizations such as airlines, hospitals, haircutters, and restaurants. There are limits as to how long customers are willing to be kept waiting and service must be delivered fast…

    • 750 Words
    • 3 Pages
    Good Essays