Within the framework of drafting and realization of the Strategy, Strategic Plan, Program for Sustainable Development of territories, economic sectors and activity fields of enterprises, the following expert situational management systems (ESMS) have been created and developed to the level of an economic instrument:

• “Assistant to Expert” knowledge acquisition system (building a conceptual model of the application domain and situational space designs);

• “Small Problem Solver” (shaping rule-oriented knowledgebase for and providing operational support to the applied ESMS);

• “Leader” (developing situational trainer-simulators for training managerial decision-makers and for providing information support).

In contrast with the traditional approach and mathematical method-based systems, the proposed systems are designed as situational management systems based on the logical-linguistic models for ensuring sustainable development on the scales of the Russian Federation, region, municipality, economic sector, or activity field. Built on different principles, namely, on the artificial intelligence advancement, the proposed systems surpass the best patterns of information-analytical management systems in the world.