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Simulation and Modelling
Notes State Charts
1. Allow the decomposition of a model into sub-models (see following slide)
2. A brief description of the actions is included following the ‘do’ in each state
3. Can be complemented by tables describing the states and the stimuli
Figure 1.10: Microwave Oven Operation
Semantic Data Models
1. Used to describe the logical structure of data processed by the system
2. Entity-relation-attribute model sets out the entities in the system, the relationships between
these entities and the entity attributes
3. Widely used in database design. Can readily be implemented using relational
databases
4. No specific notation provided in the UML but objects and associations can be used
22 LOVELY PROFESSIONAL UNIVERSITY
