PERFORMANCE SIMULATION AND DESIGN OF PETRI NET SYSTEMS

The domain expert's heuristics are used in the performance design of collaborative systems which are modelled by client-server timed Petri nets. The collaborative system Petri net model is decomposed into basic primitive structures. The performance design rules that make up the expert system are categorized according to the primitive structure type. The rules are classified as: Diagnostic Rules, Primitive Structure Rules, Upstream Search Rules, Downstream Propagation Rules and Advisory Rules. In tuning the system operation, the expert system follows the policy of local improvement, while keeping the global propagation of adverse effects of tuning to a minimum.