Then, DFD Level 2 delves even farther into specific
areas of Level 1 of Car. To get the required amount of
detail regarding how the car functions, extra features
could be needed. The Car Sales System's First Level
DFD (1st Level) illustrates how the system is broken
down into smaller subsystems (processes). More
information about the login, customer, inventory, car
owner, sales, car models, and cars can be found in the
second level DFD.
Send
Email
To
User
Forgot
Pass
Login to
System
Check
Creden
tial
Check
Roles of
Access
Manage
Module
Manage Cars Detail
Manage Cars Model
Detail
Manage Sales
Detail
Manage Inventory
Detail
Manage Customer
Profiles
Manage Report
Manage User
Permission
Manage Roles of
User
Manage System
Admins
Admin
DFD Level 2
Additional detail on specific aspects of the Car Sales System, expanding on Level
1 by delving into subsystems
Low level functionalities of Car Sales System
Logins to the system and manage all the functionalities of Car
Sales System
Admin can add, edit, delete and view the records of Cars,
Sales, Inventory, Login
Admin can manage all the details of Car Models, Car Owner,
Customer
Admin can also generate reports of Cars, Car Models, Sales,
Car Owner, Inventory, Customer
Admin can search the details of Car Models, Inventory,
Customer
Admin can apply different level of filters on report of Cars, Car
Owner, Inventory
Admin can tracks the detailed information of Car Models,
Sales, Car Owner, , Inventory