This System design data flow diagram is a graphical or visual depiction of a company's activities via data movement that uses a defined set of symbols and notations. They are commonly used in formal approaches such as Structured Systems Analysis and Design Method. DFDs may resemble flow charts or the Unified Modeling Language, but they are not designed to depict program logic details. System design data flow diagrams simplify the depiction of application business requirements by depicting the sequence of process stages and information flow using a graphical or visual representation rather to a textual explanation.
