Data Flow Diagram (DFD)
Overview
Data flow diagram (DFD) represents the flows of data between
different processes in a business. It is a graphical technique that depicts
information flow and the transforms that are applied as data move form input to
output. It provides a simple, intuitive method for describing business
processes without focusing on the details of computer systems. DFDs are
attractive technique because they provide what users do rather than what
computers do.