... Evolution of SNS consists of changing its states. A state change (also called state transition)can consist in changing net’s marking, or changing values of clocks (elapsing of time). In every ... systems in intelligent manufacturing,” Journal of Intel-ligent Manufacturing, vol. 14, no. 1, pp. 123–136, 2003, specialissue on Internet Based Modelling in Intelligent Manufactur-ing.[15] ... else.(1)For any subset s⊆ T, the markings s−and s+denote thesum of markings t−and t+,respectively,ands represents theunion of markingst for t ⊆ s.The firing of a spontaneous transition...