Place Order Example | AI MVC System Architecture Generator

The Place Order use case is a key feature in food delivery and online ordering platforms. It demonstrates how a customer selects a restaurant, browses the menu, adds items to the cart, and reviews the total before finalizing the order. With the Sequence Diagram Refinement Tool, this familiar process can be broken down into MVC architecture, making it easier to see how user interactions connect to backend order processing.

Step 1 : Use Case Input

In this example, the topic is about placing a food order through a delivery application. The use case describes how a customer navigates restaurants, views menus, selects items, and prepares the cart for checkout.

You can either:

• Enter the description manually, or
• Use the “Generate with AI” option, which walks you step by step through creating a complete use case description.

Afterward, you can instantly generate both the Controller Class Diagram and the MVC Sequence Diagram to continue the workflow.

Step 2 : Generate MVC Architecture

i. Controller Class Diagram

Based on the use case, the tool generates a controller class diagram that illustrates the order management logic. This provides a structured view of how the controller responds to customer actions before linking to models such as restaurants and menu items.

Controller Class:

• PlaceOrderController
  • +selectRestaurant()
  • +displayMenu()
  • +addItemToCart()
  • +updateCartTotal()
  • …

The diagram can be adjusted in Visual Paradigm Online to fit your specific platform requirements, or exported as SVG for sharing with your team.

ii. MVC Sequence Diagram

From the description, the tool builds a sequence diagram in MVC form. It traces how the customer (Actor) interacts with the restaurant selection and menu views, how the controller updates the cart, and how order data is prepared in the model.

At this stage, you can:

• Export the diagram as SVG for documentation
• Open in Visual Paradigm Online to modify or extend the flow
• Further refine it using the AI Sequence Diagram Refinement Tool