SAMPLE CONTROL CONTEXT DIAGRAM

Derek J Hatley and Imtiaz A Pirbhai, Strategies for Real-Time System Specification, Dorset House Publishing, 1987

Drawing Rules: the only absolute rule for the drawing of the data context diagram is that it must contain only one process (representing the system). Any number of terminators and dflow elements are allowed.

Definition: The control context diagram establishes the control boundary between the system under study and the environment. It is used to show communication between the system and the environment and the entities in the environment with which the system communicates. The control context diagram is the highest-level control flow diagram for the system.