Performance evaluation of systems using nets
This paper presents a method for computing firing frequencies corresponding to steady state functionings of Timed Place-Transition Nets (TPIN). Two different models of TPIN's — the one with delays associated to its places and the other with delays associated to its transitions — are compared and proved to be equivalent. Given a TPIN it is provided a set of relations established between its initial marking, the firing frequences of its transitions and the delays associated to its places. Furthermore, for given initial marking and delays it is shown that maximal firing frequencies can be computed as solutions of a set of n linear equations, where n is the number of places of the TPIN. The presented results are illustrated by two applications.
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