Scenario: Hotel Ordering and Management System

Problem Statement: You are tasked with developing a comprehensive Hotel Ordering and Management System to streamline the process of room bookings, food orders, and overall hotel management.

Requirements:

$1.$ Room Booking:

$$ Guests should be able to browse available rooms, view room details, and make reservations.

$$ The system should allow for online payments for room bookings.

$2.$ Ordering System:

$$ Guests should be able to place orders for food, beverages, and other hotel services through the system.

$$ The system should provide a menu with item details, prices, and availability.

$3.$ User Management:

$$ The system should support user accounts for guests and hotel staff.

$$ Guests should be able to register, log in$,$ and track their reservations and orders.

$$ Hotel staff should have roles such as receptionists, managers, and kitchen staff, each with specific privileges.

$4.$ Reservation Management:

$$ Hotel staff should be able to view and manage room reservations.

$$ The system should send notifications to guests about reservation confirmations and upcoming check$-$ins.

$5.$ Inventory Management:

$$ The system should keep track of food and beverage inventory.

$$ Staff should be alerted when certain items are running low or when it's time to restock.

UML Diagrams:

$1.$ Use Case Diagram:

$$ Identify use cases such as "Make Reservation," "Place Order," "Manage Reservation," and "Inventory Management."

$$ Define actors like "Guest," "Receptionist," "Kitchen Staff," and "Manager."

DFD Diagrams:

$1.$ Context Diagram:

$$ Identify external entities such as "Guest," "Staff," and "Inventory Supplier."

$$ Show the main process, which is the "Hotel Ordering and Management System."

$2.$ Level $1$ DFD $($Data Flow Diagram$)$:

$$ Decompose the main process into sub$-$processes like "Room Booking," "Order Placement," and "Inventory Control."

$$ Show data flows between these processes and external entities