Abstract
The paper presents an approach to optimization of an enterprise's activity based on cybernetics and the theory of systems. The method proposed is based on the model describing optimum activity of an enterprise in a changing environment. The method assumes identification of the immanent objective of an enterprise's activity and conditions of this activity, as well as definition of the objective function in the form of optimisation criteria. The model facilitates proper identification of problems related to activity of an enterprise, their hierarchisation and evaluation as well as coordination of the optimisation ventures.