Data Flow Diagram

• A process modeling tool that depicts
• the flow of data through a system
• the work or processing performed by the system
• When to use DFDs?
• Help you to understand the system
• Make a complex process clear
• Communicate your understanding
• Find the data used in the system
• Show the flow of data within a system and its transformation
• DFDs store:
• where data begins
• how data gets transformed through processes
• where data finishes
•  DFDs do not store:
• how the process occurs
• who does it
• Data Flow Diagrams are only concerned with DATA