Data Flow Diagrams are decomposed or expanded into levels. Leveling means separating each process into sub processes, and also uncovering more details about the process in each level. Levels.
How would you level a DFD?
Constructing level 1 DFDs
- Identify processes. ...
- Draw the data-flows between the external entities and processes.
- Identify data stores by establishing where documents / data needs to be held within the system. ...
- Add data-flows flowing between processes and data stores within the system. ...
- Check diagram.
What DFD means?
A data-flow diagram is a way of representing a flow of data through a process or a system (usually an information system). The DFD also provides information about the outputs and inputs of each entity and the process itself. ... When using UML, the activity diagram typically takes over the role of the data-flow diagram.
