The development of the wider city area of the city of Vinkovci in the last 30 years has led to the construction of industrial and residential buildings on the outskirts. Based on that, the same spatial plans already provide for the placement of energy capacities to cover the needs of growing electricity consumption. Considering the proper planning and maintenance of the medium voltage network, as well as the increasing demands placed on the distribution system operator, in terms of European and Croatian legal energy regulations, it is necessary to find the best technical solutions that will also be economically profitable. The same should be carried out in the most efficient way to reduce the state risks for the medium voltage network to the lowest possible extent based on the above. Pursuant Law on Electricity Market, the Croatian distribution system operator is obliged to submit a tenyear distribution network development plan to the Croatian Energy Regulatory Agency (HERA) during the calendar year (at the end of September) for approval. HERA is in the process of defining a methodology for the evaluation of distribution network development plans, which, among other things, prescribe the need for a cost-benefit analysis (CBA). When creating plans for the development of energy facilities, it is necessary to analyse in detail and define the criteria for determining priorities for revitalization, replacement, and reconstruction of elements of the distribution network and transformer stations. When creating plans for the development of energy facilities, it is necessary to analyse in detail and define the criteria for determining priorities for revitalization, replacement and reconstruction of elements of the distribution network and transformer stations. It is also necessary to keep in mind the changes introduced by the energy transition in terms of the introduction of new advanced technologies and the development of the connection of new distributed sources from renewable energy sources to the distribution system operator's network. In this way, risks are correctly managed, considering technical / economic aspects and responding to future challenges that are placed before the distribution system operator. The research within the framework of this specialist work is based on the hypothesis that based on a verified program package and the CBA method; we can manage the resources of the Croatian distribution system operator in order to achieve better business results. The analysis showed that the proposed construction of a new medium voltage point in the city of Vinkovci is economically justified. Its construction achieves significant benefits from the reduction of electricity losses, benefits from the reduction of undelivered electricity, benefits from the reduction of CO2 emissions and benefits from avoiding investment in the 35 kV network and TS 35/10 kV TS. The research showed how to properly manage risks, taking into account technical/economic aspects and how to respond to future challenges that are set before the distribution system operator.