Easy DEVS

ABSTRACT

DEVS is a well-established M&S framework. Through the history of its development, two main strands stoud out clearly: the so-called Classic DEVS and Parallel DEVS. Today, there is a need for DEVS modelers to deal with a unified formalism, as well as with a powerfull and yet intuitive formalism. This paper is a contribution to these needs. Three aspects are considered: (1) the strong link between the output and the internal transition functions and its impact on the modeling effort, (2) the coupling issue and its implicit impact on the transitions collision problem that has led to classic DEVS and parallel DEVS and, (3) the way to provide a unified specification framework.

REFERENCES

• 1: Bernard P. Zeigler, Theory of Modelling and Simulation, Krieger Publishing Co., Inc., Melbourne, FL, 1984
• 2: Bernard P. Zeigler, Multifacetted modelling and discrete event simulation, Academic Press Professional, Inc., San Diego, CA, 1984
• 3: Zeigler, B. P., H. Praehofer, and T. G. Kim. 2000. Theory of Modeling and Simulation. Integrating Discrete Event and Continuous Complex Dynamic Systems. 2^nd Ed. Academic Press. Davis.
• 4: A. C.-H. Chow, Parallel DEVS: a parallel, hierarchical, modular modeling formalism and its distributed simulator, Transactions of the Society for Computer Simulation International, v.13 n.2, p.55-67, June 1996
• 5: David Harel, Statecharts: A visual formalism for complex systems, Science of Computer Programming, v.8 n.3, p.231-274, June 1, 1987 [doi>10.1016/0167-6423(87)90035-9]