Abstract
Energy planning is a management and control tool meant to deal medium- and long-term with the interaction process between the economic development and efficient resource allocation of a given country. The paper gives a complementary approach to an econometric model which by means of fuzzy sets theory enables the social planner to estimate the energy vector at a given moment within the content of a given industrial structure. The fuzzy approach is used to quantify the preferences and/or the given information states that are neither deterministic in use nor certain and so they have to be dynamically approached. This approach is used to compute and evaluate end use energy demand on a time scale. The management-oriented results illuminate further dimensions of the complex problem of energy use management by means of models and the interaction with the social planner, its way of thinking and preferences.