The imperfection of structure and the maintenance of stages of a predesign stage of implementation of the investment project creates some problems which pass into the subsequent stages of the reproduction cycle of a capital construction project, forming additional expenses of time, money and human resources. The authors pay the main attention to the stage of justification of investments (mainly to the means of the federal budget) as to the key element of decision making on the project implementation and also to the technical-and-economical justification of the project, which determines the further design and construction of the facility of the real estate. It is offered to use the system of indicators for the assessment of efficiency of the made decisions on the basis of uncontrollable and controlled factors. The mathematical model of the factors, the order of definition of the extent of their influence is offered. Scenarios of the choice of the investment decision on the basis of the established principles in the conditions of uncertainty are described. The authors point out, that during introduction of the offered mechanism it is necessary to adopt the relevant amendments to the legislative and regulations of the Russian Federation, that in turn involves the emergence of a temporary log. However, the planned results of the work of the modernized system will affect positively on the reduction of duration of the predesign stage without any loss of its qualitative characteristics. Thus, that might become one of the key factors of sustainable development of modern cities. * Corresponding author: i.kar@inbox.ru Web of Conferences 193, 05002 (2018) https://doi.org/10.1051/matecconf/201819305002 ESCI 2018 represents by and large implementation of priority state programs, with attraction of financial resources of the federal budget. Process of adoption of investment decisions is the integral part of strategic planning which has to provide coordination of long-term goals of the state and the use of the resources, directed to implementation of priority programmes [1]. MATEC