Transcript Simulation with Arena

Sequences and Conveyors
By Dr. Jason Merrick
Sequences
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Open the Arena File “BankNoSequences.doe” from
course website
This file contains all the arrivals and departures, but the
ATM customers who then need help from a teller are just
leaving
Add a SEQUENCE module
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Add the first sequence
Call it ATMtoTellertoTellerExit
Press the TAB key
Add the first step: Station = ATM, Press OK
Add the second step: Station = TELLER, Press OK
Add the third step: Station = TELLER EXIT, Press OK
Simulation with Arena — Further Statistical Issues
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Sequences
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We must now tell the entities arriving at “ATM Teller
ENTRY” that they will follow this sequence
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Go to the ARRIVE modules “ATM Teller ENTRY”
Click ASSIGN then ADD
Choose Assignment Type = Other
Under the drop down box Other, choose Sequence
Enter Value = ATMtoTellertoTellerExit
Next we must add the flow logic so that the entities follow
this sequence
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Go to the ARRIVE modules “ATM Teller ENTRY”
Under the Leave Data, the Route option is selected with StNm
Choose Seq instead and it will follow the assigned sequence
Do the same for the STATION module ATM and TELLERS
Simulation with Arena — Further Statistical Issues
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Sequences
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The entities coming from “ATM Teller ENTRY” are
following a sequence through the ATM and TELLER
modules
But entities from “ATM Entry” and “TELLER ENTRY” are
also using these modules
Define Sequences
– ATMtoATMExit
– TELLERtoTELLERExit
In the ATM ENTRY module
– Assign the sequence ATMtoATMExit
In the TELLER ENTRY module
– Assign the sequence TELLERtoTELLERExit
Simulation with Arena — Further Statistical Issues
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Sequences
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Run the simulation
The entities now move around the various resources
Can you see the entities moving from the ATM to the
Tellers?
There is no route, so no animation
The STATION markers are already there (marked in red)
So just click on the ROUTE button on the ANIMATE
toolbar
– Add the route between the ATM and the Teller Queue
Simulation with Arena — Further Statistical Issues
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Sequences
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To distinguish these irate customers, click on the picture
above the SIMULATE module
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Click on the ADD button on the left hand side
An empty slot appears
Enter IRATE as the value
Click on a picture on the right hand side and hit the << button
This moves the picture into the empty slot
To change the picture when the entity leaves the ATM
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Open the SEQUENCES module
Choose the ATMtoTellertoTellerExit sequence
Click EDIT and then ADD assignment
Choose Assignment Type = Picture
Choose the irate picture
Simulation with Arena — Further Statistical Issues
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Conveyors
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We are going to replace the routes that the people follow
in the bank with conveyors
Attach the Transfer panel
Add 3 Conveyor Objects
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Call the first conveyor ATMConveyor
Call the second conveyer TellerConveyor
Call the third conveyor ATMtoTellerTransfer
Leave the other options as they are for now
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Velocity is the speed of the conveyor
Cell size and Max Cells Occupied are used to manage space on the
conveyor
Conveyors can be turned on and off
There are two types of conveyors: accumulating and non-accumulating
Simulation with Arena — Further Statistical Issues
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Conveyors
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Conveyors are animated using segments
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Replace each route with a segment
For each segment, click on the S module attached
Specify the source and destination stations
Specify the Conveyor segment set it belongs to: ATMConveyor_Seg,
TellerConveyor_Seg or ATMtoTellerTransfer_Seg
– Choose a length for the conveyor (based on the distance?)
Conveyors are a resource which must be Accessed and
Exited
– At the source station, choose Tran Out, then Access and specify the
conveyor name
– At the destination station, choose Tran In, then Exit Conveyor
– Do this for each segment of the conveyor
Simulation with Arena — Further Statistical Issues
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Transporters
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Transporters are another type of entity transfer resource
You must add transporters from the transfer panel
Specify the number of transporter units, there initial
positions and the distance sets
Distances are the equivalent of segments for conveyors
– Replace all routes with distances
Transporters must be Requested in the Tran Out data and
Freed under the Tran In data
As there are limited numbers of transporters, rules must
be specified and a queue can form while waiting
Simulation with Arena — Further Statistical Issues
C11/9