The high value of the portfolio managed by the HEP-Operator distribution system, and the increasing requirements and challenges set before the Operator by European and Croatian energy regulators, seek to find an appropriate efficient asset management model, which, in a more efficient way, with optimal investments, planning of maintenance and investment in the network, will reduce the potential risks of the state of the network elements to an acceptable measure. The Asset Management Concept, defined by ISO Standard 55000 Asset Management, represents a systematic approach to asset management, based on analytical methods that take into account all available information about distribution network elements. The complexity of the distribution network results in the complexity of investment plans or maintenance activities. A large number of distribution facilities on the one hand, and limited financial resources on the other, require a decision-making system that, on the basis of available data and information, engineering knowledge and certain criteria will make decisions and offer solutions when choosing units and elements of a network suitable for investment or maintenance. The methodologies for ranking units and elements of the network are a tool by which, in an objective manner, the available asset data and predefined criteria are compared and evaluated by individual elements of the network.