A data-flow diagram is a graphical depiction of data as it flows through a system or process. The DFD also provides information on the outputs and inputs of each entity, as well as the process itself. A data-flow diagram contains no decision rules or loops, hence there is no control flow. A flowchart can be used to depict certain data-driven procedures. This DFD example demonstrates how critical information flows through a system and depicts information flow via a system for receiving and completing goods orders.
