Case Study: Pizza's R'Us System Modeling And Diagrams Develo

Case Study: Pizza's R'Us System Modeling and Diagrams Development

Develop a comprehensive set of system diagrams and descriptions for Pizza's R'Us online pizza ordering platform. This includes a domain model class diagram, a list of use cases and use case diagram, detailed descriptions for two specific use cases—"Allow Customers to Order Online" and "Process Credit Payment"—and system sequence diagrams for each of these use cases. The goal is to accurately represent the data and processing requirements, establish clear relationships among entities, and illustrate the interactions between users and the system through detailed visual and textual descriptions.

Paper For Above instruction

The online pizza ordering system for Pizza's R'Us presents a complex integration of customer interactions, product management, and secure payment processing. Developing an effective model requires a systematic approach that begins with understanding the core entities involved, their relationships, and the processes they support. This paper discusses the creation of a domain model class diagram, a comprehensive list of use cases with a corresponding diagram, detailed descriptions for two critical use cases, and system sequence diagrams (SSDs) for each.

Domain Model Class Diagram

The domain model class diagram offers a visual representation of the primary entities within the Pizza's R'Us system and their relationships. At its core, the system includes classes such as Customer, Order, Pizza, Payment, Menu Item, and Store.

  • Customer: Contains personal details like name, address, telephone, email, and credit card information.
  • Order: Tracks all pizza orders, status, associated customer, order items, and payment status.
  • Pizza: Represents the various pizzas available, including properties like base, sauce, toppings, and categorized types.
  • Payment: Hold payment details, including credit card info, payment status, and transaction ID.
  • Menu Item: Defines the available pizzas and other products, supporting search and categorization.
  • Store: Represents the physical outlet or delivery point, linked to orders for delivery tracking.

The relationships illustrate that a Customer can place multiple Orders, each Order contains multiple Pizza items, and each Payment is linked to an Order. The class diagram helps clarify data dependencies and system boundaries, providing a foundation for further modeling activities.

List of Use Cases and Use Case Diagram

The system facilitates several key functionalities, summarized in the following use cases:

  1. Register Customer: New customer registers with personal and contact details.
  2. Login as Seller: Secure access for staff to manage orders.
  3. Search Pizza Menu: Customers search through available pizzas.
  4. Order Pizza: Customer selects pizza, customizes, and submits an order.
  5. Make Payment: Customer provides credit card details to complete purchase.
  6. Receive Confirmation Email: System sends order and payment confirmation.
  7. Update Order Status: Store updates delivery status upon completion.

The use case diagram visually depicts actors such as Customer and Store Staff, and their interactions with system functionalities. Relationships like include, extend, and generalization define the flow and dependencies among use cases, providing clarity on system behavior.

Detailed Descriptions of Two Use Cases

1. Allow Customers to Order Online

The "Allow Customers to Order Online" use case begins with the customer accessing the website and either registering if new or logging in if returning. The customer searches the menu for desired pizzas, selecting specific options for base, sauce, toppings, and quantity. They add pizzas to their cart, review the order, and proceed to checkout. The system verifies the customer's account details, calculates the total price, and prompts for payment details. Upon successful payment processing, the system confirms the order, sends an email receipt, and updates the order status to "Pending." During this process, the system maintains an open order until confirmation of delivery, ensuring that each step satisfies business rules and validation checks.

2. Process Credit Payment

The "Process Credit Payment" use case involves the customer entering credit card information at checkout. The system encrypts and securely transmits credit card details to a payment gateway. The payment gateway verifies the card information with the bank; if approved, the system records the transaction, updates the order status to "Paid," and sends a confirmation email. If the payment fails, the system prompts the customer to retry or choose a different payment method. Throughout the process, security protocols are enforced to protect sensitive data, complying with PCI DSS standards. The use case ensures seamless transaction handling, credit authorization, and update of order records to reflect the payment outcome.

System Sequence Diagrams for the Two Use Cases

System Sequence Diagram for "Allow Customers to Order Online"

The SSD illustrates interactions between the Customer, the Web Interface, the System, and the Database. The sequence begins with the Customer logging in or registering, then searching the menu, selecting pizzas, and adding them to the cart. The customer reviews the order, proceeds to checkout, and provides payment details. The system verifies the information, creates an order record with a unique ID, and sends confirmation emails. The diagram emphasizes the sequence of message exchanges, including validation, order creation, and notification steps, highlighting the flow of data and control.

System Sequence Diagram for "Process Credit Payment"

This SSD depicts the sequence starting with the Customer providing credit card information, followed by secure transmission to the payment gateway. The gateway authenticates and authorizes the transaction. Based on the response, the system updates the order status and sends confirmation or error messages. The diagram underscores critical security points, transaction approval, and error handling, ensuring robust payment processing in compliance with security standards.

Conclusion

Developing these models and diagrams provides a clear blueprint of the Pizza's R'Us online ordering system. The domain model establishes the entities and relationships; use cases outline functional requirements; detailed descriptions provide clarity on key functionalities; and system sequence diagrams visualize the interaction flow. Together, these components facilitate a comprehensive understanding of system behavior, support effective system development, and ensure alignment with business needs.

References

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