This article discusses the problem of process description in conceptual models. We argue for the idea that also the conceptual elements of the reality should be viewable dynamically – as a process.

The article outlines the sense and the methodical way of describing two basic types of the Real World processes: business processes and object life cycles. In more detail the article analyzes basic kinds of the models coherency introducing two main criteria of completeness and correctness of models together with the concept of the structural coherency of models.

It also discusses possible ways of describing dynamic aspects of the Real World and outlines some general conclusions.