ATM Problem Domain Objects

The following objects might be identified by performing domain analysis on the general domain to which our problem belongs:

Tangible Entities

• The ATM machine itself - containing the following
  • Display
  • Card reader
  • Keyboard
  • Cash dispenser
  • Envelope acceptor
  • Receipt printer
  • Operator panel
• Customer
• ATM Card
• Operator
• Bank

Intangible Entities

• Bank account

Events

• Transaction - with the following specializations
  • Cash withdrawl
  • Deposit
  • Transfer between accounts
  • Balance inquiry

Interactions

• System startup by operator
• Customer usage session
• Each kind of transaction listed above will involve some user interaction.
• Repeat entry of an invalid PIN

NOTE: Though all of these objects are part of the general domain of our problem, not all will need to be explicitly modelled by the simulated ATM system itself.

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Copyright © 1996 - Russell C. Bjork. Permission for non-commercial reproduction for educational use is hereby granted; all other rights are reserved.