The objective of the study was to determine the analytical method to determine the optimal frequency of technical control of combine harvesters for given values of the current point of operation and to determine the probability of finding the parameter of the technical state of combine harvester in one of three States: working, failure, or technical control. Clarification of the parameters of the nominal and the estimated residual local resource harvesters. This takes into account the load parameters during the operation of combine harvesters including thermal effects and interaction with the external environment, changing the characteristics of the metal due to aging. In the article the parameters of technical control of a combine harvester are disclosed through technical description at the stage of operation, that is, when the technical control is subject to specific existing harvesters. Thus, the proposed methodological approach using personality assessments of the residual resource of the combine opened additional ways to gain economic benefits
model, adequacy, optimization, parameter, control, combine