Class diagram for the Restaurant Management System

We’ll create the class diagram for the restaurant management system. In the class diagram, we will first design the classes and then identify the relationship between classes according to the requirements for the restaurant management system design problem.

Components of the restaurant management system

As mentioned earlier, we’ll follow the bottom-up approach to design a class diagram for the restaurant management system design.

Account

An Account contains an ID for the user. It also stores the address, account status, and password that can be reset.

Person

The Person class is extended by the Employee and Customer classes and stores the person's name, email, and phone number.

• Employee: This derived class stores the employee ID and the joining date of the employee. It is extended by Chef, Waiter, Receptionist, and Manager.

  • Chef: Prepares the order taken by a waiter

  • Waiter: Takes an order from the customer

  • Receptionist: Creates a reservation

  • Manager: Can add new employees

• Customer: This derived class keeps track of the last visited date of the customer.

Table and table seat

Table: This class is identified by an ID, a limited seating capacity, a specific location, and status. A table may have multiple seats.

TableSeat: It is identified by a seat number and has a type that can be updated.

Meal and meal item

Meal: It has a unique meal ID and may or may not be present as a MealItem.

MealItem: It is identified by a meal item ID and has a specific quantity that can be updated.

Menu, menu section, and menu item

Menu: It has a unique ID and title, a description, and may have several sections.

MenuSection: This class represents a section of the menu that has an ID, a title, and a description. It may have multiple menu items.

MenuItem: It is identified by an ID and has a title, description, and price that can be updated.

Order