The article analyzes the most common mathematical models maintenance. Determining the advantages and disadvantages of the known models necessary to create new models of maintenance that will be taken as the basis for creating a common information technology technical service and repair. Found that known at present mathematical models and methods of calculating the optimum process parameters maintenance unsuitable for application to real engineering objects. The main drawback of these models is that they do not take into account the complex structure of the object, or have the opportunity to consider only some simple structures.
maintenance, mathematical model, the technical condition