Serial failure diagnosis of computer system by Petri net

Network technologies have rapidly developed and distributed computer control systems which are of asynchronous and parallel characteristics are very useful in various fields. However, it is very difficult to figure out the factors of failure of such systems. In this paper, we make a Petri net model of a simple distributed computer control system consisting of a main system and a subsystem, and show how to diagnose serial failure of the system by analyzing invariant sets of the model.