Annotation: In the article proponed design methods of the performance factor of parameters dimensional control under technical state designation of radio-technical facilities. These methods are based on the developed mathematical model "Radio-technical facilities – control system". The analysis of methods for controlling the technical state of radio-technical facilities is conducted. The control method based on a comparison of the computed value efficiency indicator of the radio-technical facility with its acceptable value is substantiated. A method is developed for calculating the measures of the dimensional control efficiency in the radio-technical facilities parameters while selfmonitoring (before application as intended). The method of calculating the efficiency index of the dimensional control of radio-technical facilities parameters under a complex test is improved. A method is proposed for determining the standard time parameters of the dimensional control of the radio-technical facilities parameters of a radio-engineering device in determining its technical state.