waiting line
DESCRIPTION
It tells us about the Waiting Line concept that generally happens in getting any serviceTRANSCRIPT
SERVICE MARKETING SERVICE MARKETING PRESENTATIONPRESENTATION
Waiting-Line ModelsWaiting-Line Models
CONTENTSCONTENTS
CHARACTERISTICS OF A WAITING-LINE SYSTEM
A BRIEF HISTORY Waiting Line Terminology Waiting line systems. WAITING LINE STRATEGIES
CHARACTERISTICS OF A WAITING-LINE SYSTEM Arrival Characteristics Waiting-Line Characteristics Service Facility
Characteristics Measuring the Queue’s Performance Queuing Costs
‘The other line always moves faster.’
‘If you change lines, the one you left will start to move faster than the one you’re in.’
© 1995 Corel Corp.
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You’ve Been There Before!You’ve Been There Before!
Bank Customers Teller Deposit etc.
Doctor’s Patient Doctor Treatmentoffice
Traffic Cars Light Controlledintersection passage
Assembly line Parts Workers Assembly
Tool crib Workers Clerks Check out/in tools
Situation Arrivals Servers Service Process
Waiting Line ExamplesWaiting Line Examples
First studied by A. K. Erlang in 1913 Analyzed telephone facilities
Body of knowledge called queuing theory Queue is another name for waiting line
Decision problem Balance cost of providing good service with cost of
customers waiting
Waiting LinesWaiting Lines
Deciding on the Deciding on the Optimum Level of ServiceOptimum Level of Service
Total expected cost
Negative Cost of waiting time to company
Cost
Low level of service
Optimal service level
High level of service
Minimum total cost
Cost of providing service
Queue: Waiting line Arrival: 1 person, machine, part, etc. that arrives
and demands service Queue discipline: Rules for determining the
order that arrivals receive service Channel: Number of waiting lines Phase: Number of steps in service
Waiting Line TerminologyWaiting Line Terminology
Three Parts of a Queuing System Three Parts of a Queuing System at MR “X” Car-Washat MR “X” Car-Wash
Input Source(Population)
Size ArrivalPattern
FiniteInfinite Random Non-Random
Poisson Other
Input CharacteristicsInput Characteristics
Input Source(Population)
Size BehaviorArrivalPattern
FiniteInfinite Random Non-Random Patient Impatient
Balk RenegePoisson Other
Input CharacteristicsInput Characteristics
Waiting Line
Length QueueDiscipline
LimitedUnlimited FIFO(FCFS) Random Priority
Waiting Line CharacteristicsWaiting Line Characteristics
ServiceFacility
Configuration
Multi-Channel
SingleChannel
SinglePhase
Service CharacteristicsService Characteristics
ArrivalsServed units
Service facility
Queue
Service system
Dock
Waiting ship lineShips at sea
Ship unloading system Empty ships
Single-Channel, Single-Phase Single-Channel, Single-Phase SystemSystem
Cars& food
Single-Channel, Multi-Phase Single-Channel, Multi-Phase SystemSystem
ArrivalsServed units
Service facility
Queue
Service system
Pick-up
Waiting carsCars in area
McDonald’s drive-through
Pay
Service facility
Arrivals
Served units
Service facilityQueue
Service system
Service facility
Example: Bank customers wait in single line for one of several tellers.
Multi-Channel, Single Phase Multi-Channel, Single Phase SystemSystem
Service facility
Arrivals
Served units
Service facilityQueue
Service system
Service facility
Example: At a laundromat, customers use one of several washers, then one of several dryers.
Service facility
Multi-Channel, Multi-Phase Multi-Channel, Multi-Phase SystemSystem
Assumptions of the Basic Simple Assumptions of the Basic Simple Queuing ModelQueuing Model
Arrivals are served on a first come, first served basis
Arrivals are independent of preceding arrivals Arrival rates are described by the Poisson
probability distribution, and customers come from a very large population
Service times vary from one customer to another, and are independent of one and other; the average service time is known
Service times are described by the negative exponential probability distribution
The service rate is greater than the arrival rate
Simple (M/M/1) Example: Information booth at mall
Multi-channel (M/M/S) Example: Airline ticket counter
Constant Service (M/D/1) Example: Automated car wash
Limited Population Example: Department with only 7 drills
Types of Queuing ModelsTypes of Queuing Models
WAITING LINE STRATEGIESWAITING LINE STRATEGIES
When demand and capacity cannot be matched:
EMPLOY OPERATIONAL LOGIC
A] Multiple Queue
B]Single Queue
C]Take a number
Contd…..Contd…..
Establish a Reservation Process. Differentiate Waiting Customers.i. Importance of the customer.ii. Urgency of the job.iii.Duration of the service transaction.iv. Payment of a premium price.
MAKE WAITING FUN,OR AT MAKE WAITING FUN,OR AT LEAST TOLERABLELEAST TOLERABLE
Unoccupied time feels longer than occupied time. Preprocess waits feel longer than in process
waits. Anxiety makes waits seem longer. Uncertain waits are longer than known, finite
waits. Unexplained waits are longer than explained
waits.
Contd…..Contd…..
Unfair waits are longer than equitable waits. The more valuable the services, the longer the
customer will wait. Solo waits feel longer than group waits.
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