Introduction

• Discrete systems
  • many different modeling paradigms
  • graphical methods
    • abstract (Petri nets, state graphs)
    • medium level of abstraction (entities running through components)
    • concrete (material flow applications, e.g. PlantSimulation)
  • medium level widely used
    • sufficiently abstract to be universally applicable
    • concrete enough to be comprehensible by users
    • process based (active components, e.g. Arena) or transaction based (active entities, e.g. SimEvents)
• Closer look at transaction based modeling
  • no well-established set of basic features and components (cf. SimEvents 4.4 → 5.0)
  • open issues
    • shortcomings of current implementations
    • missing concepts or components
    • reasonable set of components
  • strategy
    • implement many different applications
    • concrete: SimEvents 4.4 (Mathworks)