There are four components for a Data Flow Diagram. They are

  • External Entities/ Terminators are outside of the system being modeled.

They represent where information comes from and where it goes. These

are represented by rectangles.

  • Processes, usually represented by an ellipse (circle), which modify the

input to generate the output.

  • Data Stores represents a place in the process where data rests. This is

represented by an open-ended rectangles or a cylinder symbol.

  • Data Flows, represented by arrows, are how data moves between

terminators, processes, and data stores


Constructive and genuine appreciation and/or criticism most welcome

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s