Datenflussdiagramm

A Datenflussdiagramm, or Data Flow Diagram (DFD), is a graphical representation of the flow of data through a system. It is a common tool used in systems analysis and software engineering to model the flow of data from input to output within a system. DFDs are part of the structured analysis and design technique (SADT) and are used to depict the movement of data through a system, as well as the processes that transform the data.

A DFD consists of four main components: external entities, processes, data stores, and data flows. External entities are sources or destinations of data that interact with the system but are not part of the system itself. Processes are the transformations or operations performed on the data. Data stores are repositories where data is stored and retrieved. Data flows are the paths along which data moves between the other components.

DFDs are typically created in a hierarchical manner, starting with a high-level overview of the system and then breaking down each process into more detailed sub-processes. This hierarchical approach allows for a clear and systematic representation of the system's data flow.

DFDs are valuable tools for understanding and documenting the flow of data within a system. They help to identify potential bottlenecks, inefficiencies, and areas for improvement. Additionally, DFDs can serve as a communication tool between stakeholders, providing a visual representation of the system's data flow that can be easily understood by both technical and non-technical individuals.

In summary, a Datenflussdiagramm is a graphical tool used to model the flow of data through a system. It consists of four main components and is created in a hierarchical manner. DFDs are valuable for understanding, documenting, and improving the flow of data within a system.