In between the process and the external entities, there is data flow (connectors) that indicate the existence of information exchange between the entities and the system.Ĭontext DFD is the entrance of a data flow model. In this example, the Supplier, Kitchen, Manager, and Customer are the entities who will interact with the system. It also shows the participants who will interact with the system, called the external entities. It contains a process (shape) that represents the system to model, in this case, the " Food Ordering System". The figure below shows a context Data Flow Diagram that is drawn for a Food Ordering System. Simple to draw, amend and elaborate as its limited notation.No technical knowledge is required to understand with the simple notation.Shows the overview of the boundaries of a system.Some of the benefits of a Context Diagram are: At this level, there is only one visible process node that represents the functions of a complete system in regards to how it interacts with external entities. The Food Ordering System Example Context DFDĪ context diagram is a data flow diagram that only shows the top level, otherwise known as Level 0.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |