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Software Engineering
Notes
Figure 9.5: CASE Toolset DFD
State Machine Models
These model the behaviour of the system in response to external and internal events
They show the system’s responses to stimuli so are often used for modelling real-time systems
State machine models show system states as nodes and events as arcs between these nodes.
When an event occurs, the system moves from one state to another
State charts are an integral part of the UML
Figure 9.6: Microwave Oven Model
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