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Types of System Models
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- Formal Models
- Mathematical formulation
- Defines constraints on function and performance
- Defines relations of outputs to inputs
- Has been largely of academic interests; emerging in industrial practice
- Uninterpreted Models
- Behavior described as tokens flowing through a queuing network or Petri network
- Input/output relationships are largely ignored
- Primary interest is estimating timing delays between inputs and outputs in the system being described
- Has been largely of academic interest; emerging in industrial practice
- Interpreted models
- Actual behavior is described, at some level of abstraction
- Primary interest is defining functions between inputs and outputs
- Has been standard modeling approach in industry for 20+ years
