Operational and Decision Making tools presentation on queuing models.

1. Queuing Model
Operational and Decision Making Tools
By: Chizhova Daria
Prof.: Tara Doubman
Date: 6.06.13

2. What is queuing theory?
O Analysis of queuing lines in
Manufacturing and Service
O waiting-line length
O average waiting time
- Service system
- Maintenance activities
- Shop-floor control activities

3. Characteristics of a Waiting
Line (I)
O Arrivals or Inputs
to the system
Limited
Size
Unlimited
Balk
Reneging
Behaviour
Patient
Schedule
Pattern
Randomly

4. Characteristics of a Waiting
Line (II)
O Waiting-Line Characteristics
O Length is LIMITED or UNLIMITED
O Queue Discipline - FIFO

5. Characteristics of a Waiting
Line (III)
O Service Characteristics
F
O Design of the Service System
O Single-channel queuing system
F
O Multichannel queuing system
F
O Single-channel Multiphase
O Multichannel Multiphase
F
F
F
F
F
F

6. Measuring Queues
Performance
O Average time each customer spends in
O
O
O
O
O
O
the queue
Average queue length
Average time customer spends in system
Average number of customers in system
Probability of facility being idle
Utilization factor for the system
Probability of specific number of
customers in the system

7. 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

8. Examples (II)
Disneylands and Hotels
O Fast-Pass
O Changing the perception of queues
O Using Ipad with Scanners installed

9. Queuing Theory
O
http://www.youtube.com/watch?v=F5Ri_H
hziI0

10. Thanks for Attention!