ATM System Modelling: Sequence Diagram for Transaction Subsystem

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ATM System Modelling
Author Note
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Contents
System Modelling................................................................................................................5
Sequence diagram for the transaction subsystem of the ATM........................................5
System Documentation........................................................................................................9
System Transactions............................................................................................................9
Cash Withdrawal.............................................................................................................9
Cash Deposit....................................................................................................................9
Amount Transfer..............................................................................................................9
System Components............................................................................................................9
The card Reader...............................................................................................................9
The Keypad....................................................................................................................10
The Printer.....................................................................................................................10
The screen......................................................................................................................11
System Operations.............................................................................................................11
Authentication................................................................................................................11
ATM Withdrawal...........................................................................................................12
Depositing Funds...........................................................................................................12
Transfer Money.............................................................................................................13
Data communication..........................................................................................................13
Session handling................................................................................................................14

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Feedback mechanism.........................................................................................................14
The database......................................................................................................................14
The backend processing system.........................................................................................15
Summary............................................................................................................................15
Conclusion.........................................................................................................................15
Recommendations..............................................................................................................15

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Table of figures
Figure 1............................................................................................................................................5
Figure 2. Withdrawal Transaction...................................................................................................6
Figure 3. Deposit Transaction..........................................................................................................7
Figure 4. Money Transfer................................................................................................................8