Free Standard Use Case

Prepared by: [YOUR NAME]

I. Actors

• Customer: The individual who searches for, selects, and purchases books.

• Payment Gateway: The service that processes the payment transactions.

• Inventory System: The system that manages book stock levels.

• Shipping Service: The service responsible for delivering the book to the customer.

II. Main Success Scenario

1. Customer searches for a book:

   • The customer uses the search functionality on the website or app to find a specific book.

2. Customer selects a book and adds it to the cart:

   • The customer views the book details and adds the book to their virtual shopping cart.

3. Customer proceeds to checkout:

   • The customer initiates the checkout process by navigating to the cart and choosing to complete the purchase.

4. Customer enters shipping information:

   • The customer provides their shipping address and contact details for delivery.

5. Customer chooses a payment method and completes the payment:

   • The customer selects a preferred payment method (e.g., credit card, PayPal) and enters payment details.

6. Payment Gateway processes the transaction and confirms the payment:

   • The payment gateway verifies and processes the payment. Once successful, it confirms the transaction.

7. Inventory System updates the stock:

   • The inventory system deducts the purchased book from the available stock.

8. Shipping Service receives the order information:

   • The shipping service gets the details of the order and prepares it for delivery.

9. Customer receives an order confirmation:

   • The customer receives a confirmation message or email with the details of their purchase and estimated delivery date.

III. Extensions

IV. Preconditions

Customer must have an active account:

• The customer needs to be logged in or have an account to complete the purchase.

Inventory System must be updated with current stock information:

• The system should reflect accurate stock levels to prevent issues with out-of-stock items.

Payment Gateway must be operational:

• The payment processing service should be functioning correctly to handle transactions.

V. Postconditions

Order is placed and payment is confirmed:

• The system registers the order and confirms that payment has been successfully processed.

Inventory is updated:

• The inventory system reflects the new stock levels after the purchase.

Shipping Service starts the delivery process:

• The shipping service initiates the process of delivering the book to the customer.

VI. Special Requirements

The system must support multiple payment methods:

• The checkout process should accommodate various payment options to suit different customer preferences.

The system must comply with data protection regulations:

• Customer information, including payment details and personal data, must be handled in accordance with legal and regulatory standards.

The system must handle high volumes of traffic efficiently:

• The website or app should be able to manage large numbers of users and transactions, especially during peak times.

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