Management of nonurban road network maintenance is a complex management process that requires the inclusion many technical, economic, and other characteristics problem, as well continuous application new knowledge approaches, to management. To effectively manage in conditions limited financial resources, examined through three interrelated functions planning: implementation, monitoring, control...

Predicting the maintenance and management costs and replacement age of tractors in agricultural mechanized units, is important from several points. So, doing a timely agricultural operations, more accurate measure of the amount of income  including the cost of these items , determining the useful life of old tractors , replacement age, cost of the process changes and the possibility of examinin...