LAUSR

This article clarifies the definition of system in terms of the Unit–Function–Object system-object approach based on the Abadi–Cardelli object calculus. The formalization of the concepts system-forming factor and system adaptation is proposed. The presented formalisms are used to take system-wide regularities in constructing graphical-analytical models of organizational systems and business processes by the system-object method of knowledge representation into account. The identified possible ways of taking regularities into account are compared with the capabilities of the system-structural and object-oriented approaches, as well as with the Business Process Model and Notation. A formal description of system-wide regularities is given that makes it possible to substantiate the hierarchical relationship between them.