Dfd thesis

In other cases — DFD can show how different departments of the organization cooperate — it makes things clear and coherent. The entire method was devised back in the 1970s as a mean to streamline documenting and subsequent presentation of the workflow processes.

Datastore — represents repositories for data that is not moving at the moment. It may be either a just in case buffer or queue for later use. Most commonly it is either database tables or membership forms; External entity — represents sources or destination points of information outside the boundaries of the described system.

There are four fundamental notation elements of DFD — so-called data items: Process — represents any transformative process of the incoming flow of information into the outgoing workflow. The process receives input and generates an output;

There is an easy way of explaining what DFD is. It makes things much more explicit and coherent. In Business Analysis — DFD is used for the assessment of existing and projected systems and its elements. Diagramming provides a useful toolset for exposing possible weaknesses and structural flaws.