It views a system as a function that transforms the input into desired output. Data flow diagrams are commonly used during problem analysis. This context-level DFD is then “exploded” to show more detail of the system being modeled.Ī DFD represents flow of data through a system. It is common practice for a designer to draw a context-level DFD first which shows the interaction between the system and outside entities. A data flow diagram can also be used for the visualization of Data Processing. A Data Flow Diagram (DFD) is a graphical representation of the “flow” of Student Information System.
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