You may learn more about the system’s databases through the ER Diagram for Hotel Management System. The processed inputs are stored in these databases and are used to produce outputs. This level shows more emphasis on the system’s databases (data stores). While the former levels focus on processes, DFD level 2 gives more attention to the other aspects of the project. These sub-processes show various data processing. This process gathers the employee information and monitors their workloads and performances. Employees Management – is the process used by the admin to designate their employees in different departments.This business process is one of the core functions of the project. Reservation Management – are available in the system and are offered to customers online.Its assignments are based on the orders of clients and guests (customers). Assigning Rooms and Facilities – this process may vary according to the request of certain customers.Customer Information Management – is an information system where the customer’s data is validated and used as a basis for other processes just like a reservation.This example diagram shows 4 of the sub-processes from the context diagram:
