The article is devoted to the development of metrological assurance in the field of experience based on solving optimization problems with the involvement of simulation and statistical models. This technique will improve the accuracy of decisions and reduce the time of development of technology. It is important to establish a system of views on the organization of metrological support of field experience on the basis of a system approach, taking into account the relationship and interaction of the various elements and processes of metrological assurance. The article describes an example of measurement processing of a multifactorial field experiment with application of simulation models, produced on the basis of the identification of correlations, tightness and shape which describe the regression equation or the correlation equation, which allows to obtain accurate solutions.

Keywords: field experience, observation, and optimization technologies, simulation model, regression, correlation, correlation coefficient

We propose a probabilistic and statistical method of estimating parameters of the traction units, which is the creation of acceptable modes of operation taking into account the probabilistic nature of the load, the probability ratios, and other factors that act continuously and systematically change operational characteristics of machine-tractor units. Presents the graphical dependence of the speed of the shaft of the engine SMD-62 degree load and the coefficient of its variation.

Keywords: mathematical expectation, function of communication, frequency of rotation of the motor shaft, the coefficient of variation, the degree of load probability ratio