<p>The article features the concept of institutional-synergetic approach to planning as applied to territories of advanced social and economic development (TASED). At the initial stage it is proposed to determine the system of basic characteristics which are structured on the dichotomous method basis. Selecting one of the two possible solutions (the essence of the dichotomy) allows one to take a firm position about the most acute issues of the TASED formation, to focus resources and to develop a framework of strategic planning. The article systematizes the factors of the business investments decisions; these factors must be taken into account when developing the TASED models. The designed classification of single-industry cities with the status of special territories is represented in the form of three matrices. Such a representation makes it possible to take into account differences in income levels, technological development, and demographic potential of the territories. In addition to the resources of the territory, it is proposed to include the level and quality of strategic territorial planning, the level of interaction quality between stakeholders in the territory, and the quality of the territorial development management system. The proposed approach allows one to focus both on the development institutions and institutional transformations, and also to take into account the significant differences in the social and economic development of the single-industry cities, which received the status of TASED, their synergetic development potential, the factors of system  development and system formation.</p>