ATM Withdrawal Process Example | AI MVC System Architecture Generator

The Withdraw Cash use case is one of the most common scenarios in an ATM system. It illustrates how a customer interacts with the ATM machine to insert their card, verify their PIN, and withdraw money from their bank account. Using the Sequence Diagram Refinement Tool, this basic flow can be systematically expanded into an MVC architecture with detailed controller, view, and model objects.

Step 1 : Use Case Input

In this example, the topic is about withdrawing cash from an ATM. Start by entering the use case input that describes how the customer inserts the card, enters the PIN, and requests cash.

You may either:

• Write the description yourself, or
• Click “Generate with AI” to get a step-by-step guide for creating the use case description.

You can then continue by producing both a Controller Class Diagram and an MVC Sequence Diagram through the provided buttons.

Step 2 : Generate MVC Architecture

i. Controller Class Diagram

From the Withdraw Cash use case, the tool generates a controller class diagram to represent the logic handling user actions.

Controller Class:

• WithdrawCashController
  • +handleCardInsertion()
  • +handlePinEntry()
  • +authenticateSuccess()
  • +displayMainMenu()
  • …

You can export this diagram as SVG or open it in Visual Paradigm Online for further editing.

ii. MVC Sequence Diagram

A detailed MVC sequence diagram is then generated based on the use case description. This diagram expands the basic interactions into an MVC structure, showing the ATM interface elements (View), processing logic (Controller), and banking system components (Model).

You can:

• Export the diagram as SVG
• Edit the diagram directly in Visual Paradigm Online
• Further refine it using the AI Sequence Diagram Refinement Tool