Use Case: UC2 - Place Order
- Author: Tugba Ilhan
- Date / Version: 09/06/2025 -v0.1
User roles
| Role | Description |
|---|---|
| End User | A customer who wants to buy a product |
| Business Owner | Store owner who receives the order |
| Platform Admin | Oversees transactions and ensures system stability |
Prerequisites / Conditions
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User must be logged into the platform.
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Product is in stock.
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Shopping cart contains at least one product.
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Shipping and billing information is complete.
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A supported payment method is available.
Use Case Diagram
Description of use case -Place Order
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User adds product(s) to the shopping cart.
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User proceeds to checkout.
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User reviews order summary (items, quantity, price).
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User provides/selects shipping and billing information.
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User selects a payment method and confirms the order.
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System processes payment via the selected gateway.
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Upon successful payment, the order is created and confirmation is shown.
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User receives confirmation email and order ID.
Exceptions
| ID | Description |
|---|---|
| E1 | Payment fails (e.g., insufficient funds) → Show error and retry option |
| E2 | Item is out of stock → Inform user and update cart |
| E3 | Network error during checkout → Prompt user to try again |
Result
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A new order is successfully created and saved.
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The business owner is notified.
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Inventory is updated.
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User receives order summary and tracking information.
Use frequency
Medium to High: Depending on traffic, it can be executed thousands of times daily.
Additional information
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Integration with Stripe, PayPal, and local gateways supported.
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Order ID format: ECSP1-YYYYMMDD-xxxxx
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Business Owner can track orders via admin panel.
Sources
This documentation follows common use case modeling practices for eCommerce platforms.