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This paper analyzes the notion of causality in a conceptual model, mainly asapplied in software engineering. Conceptual system modeling can be considered athree-level process that begins with building a static structural descriptionto develop a dynamic model that will identify events used to specify thechronology of events. In this context, the model involves a representation of aportion of reality, based on ontology of different kinds of things and theirbasic relations to each other. Relations are defined in terms of theirparticipating entities. This paper concerns relations between events,specifically causal relations among events in modeling. We examine causality inmany fields of study to understand its role in modeling. The problem is that,according to many researchers, causation is so inextricably bound up inmisleading associations that it is hard to define and is shrouded in mystery,controversy, and caution. We study and clarify the notion of causality throughseveral examples, utilizing an event definition as a time thing/machine in anew conceptual modeling methodology. In conclusion, we claim that the purposeof causal relations in a system s static description is to constrain the systems behavior and thus exclude some possible chronologies of events.

Causality in Static Models as an Initial Constraint on the Chronology of Events in System Behavior