![]() 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.
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