The theory of Discrete Event Systems (DES) is a research area of current vitality. The development of this theory is largely stimulated by discovering general principles which are (or are hoped to be) useful to a wide range of application domains. In particular, technological and/or `man-made' manufacturing systems, communication networks, transportation systems, and logistic systems, all fall within the class of DES. The dynamics of DES are event-driven as opposed to time-driven, i.e., the behavior of a DES is governed only by occurrences of different types of events over time rather than by ticks of a clock. The event-driven nature of a DES forces us to seek new mathematical frameworks for modelling and analysis, since differential/difference equations (developed for the analysis of time-driven systems) no longer provide an adequate setting. Theoretical disciplines that support the study of DES include various branches of applied mathematics like systems theory, operations research and theoretical computer science, as well as several subdomains of engineering, like manufacturing, communications and circuits. |
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