This paper presents a new technique for IS process/behavioural modelling. Object Life Cycle is proposed as an extension of the conventional entity life history diagram with a Petri-Net based formalism and an Event-Precondition-Action process representation. A normalization approach for IS process modelling is suggested and several OLC norms discussed. Generalization and aggregation of OLCs are explored along with the concepts of a substate and a component event. Coordination of the objects via event raising is visualized by the Inter-Object Communication Model. Finally, we discuss how OLCs relate with RUBRIC rules and data flow diagrams.

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