Design Vending Machine

Requirements Definition

Functional Requirements

• Product Selection: Users can view a list of available products and select one to purchase.
• Payment Processing: The machine accepts multiple payment methods (e.g., cash, card, or mobile payment).
• Product Dispensing: After successful payment, the selected product is dispensed to the user.
• Inventory Tracking: The machine keeps track of product stock levels and prevents sales of out-of-stock items.
• Refund Handling: If a transaction fails (e.g., payment fails or product cannot be dispensed), the system can issue a refund.
• Maintenance Access: Authorized personnel can access maintenance features such as restocking, viewing logs, or running diagnostics.

Non-Functional Requirements

• Reliability: The machine should operate with minimal downtime and handle errors gracefully.
• Security: Payment and maintenance operations must be secure to prevent unauthorized access or fraud.
• Usability: The user interface should be simple and intuitive for all users.
• Performance: Product dispensing and payment processing should be quick to avoid user frustration.
• Maintainability: The system should be easy to update and maintain by authorized personnel.