We suggest a formal dynamic model designed to represent the processes of business system development. The model consists of three working units: the objectives unit, the evaluation unit, and the operations unit. The theoretical bases of the suggested triad model are Petri nets. In this paper, we articulate the functioning of the triad model, as well as the conditions that allow us to establish a balance in the transition process. We have developed an algorithm of preliminary analysis for a system’s performance based on the triad model.