queues
DESCRIPTION
Operational and Decision Making tools presentation on queuing models.TRANSCRIPT
Queuing ModelOperational and Decision Making Tools
By: Chizhova DariaProf.: Tara Doubman
Date: 6.06.13
What is queuing theory?
O Analysis of queuing lines in Manufacturing and ServiceO waiting-line lengthO average waiting time
- Service system- Maintenance activities- Shop-floor control activities
Characteristics of a Waiting Line (I)
O Arrivals or Inputs to the system
SizeLimited
Unlimited
Behaviour
Balk
Reneging
Patient
Pattern
Schedule
Randomly
Characteristics of a Waiting Line (II)
O Waiting-Line Characteristics
O Length is LIMITED or UNLIMITED
O Queue Discipline - FIFO
Characteristics of a Waiting Line (III)
O Service CharacteristicsO Design of the Service System
O Single-channel queuing system
O Multichannel queuing system
O Single-channel Multiphase
O Multichannel Multiphase
F
F F
F
F
F
F
F
F
Measuring Queues Performance
O Average time each customer spends in the queue
O Average queue lengthO Average time customer spends in systemO Average number of customers in systemO Probability of facility being idleO Utilization factor for the systemO Probability of specific number of
customers in the system
Examples (I)Easyjet and Airports
O Speedy Boarding
O Online check-in – closing the registration desks in the airports
O Example in Airports – Self-checking Machines
O S- shaped queues
Examples (II)Disneylands and Hotels
O Fast-Pass
O Changing the perception of queuesO Using Ipad with Scanners installed
Queuing TheoryO http://www.youtube.com/watch?
v=F5Ri_HhziI0
Thanks for Attention!