Types of DFDĭata Flow Diagrams are either Logical or Physical. DFD does not contain any control or branch elements. DFDs depict flow of data in the system at various levels. The flowchart depicts flow of control in program modules. There is a prominent difference between DFD and Flowchart. The DFD does not mention anything about how data flows through the system. It is capable of depicting incoming data flow, outgoing data flow and stored data. Let us see few analysis and design tools used by software designers: Data Flow Diagramĭata flow diagram is graphical representation of flow of data in an information system. Software analysis and design is the intermediate stage, which helps human-readable requirements to be transformed into actual code.
These requirement specifications come in the shape of human readable and understandable documents, to which a computer has nothing to do. Requirement specifications specify all functional and non-functional expectations from the software. Software analysis and design includes all activities, which help the transformation of requirement specification into implementation.
