A data flow diagram (DFD) is a graphical representation of the flow of data through an information system, and is a key component of designing a successful database application. The dataflow diagram allows clients and end users to be able to visualise how the system will operate, what will be achieved and how it will be accomplished.
Data flows diagrams are an essential part of the Structured Systems Analysis and Design Method (SSADM) which Impact follows when underataking creation of all database applications.
A Standard Data Flow Diagram:
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