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Mathematical and multivariable graphic models for the index «grain losses after separator» depending on straw rate, crop moisture content and separator characteristics are developed.

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Goal of the study is to improve the laboratory management system. The substantiation of principles classification and assessment of risks are carried out. The mind-activity methodology is used. To achieve the goal it is necessary to determine the source of risk, assess a scale of selected risk impact, establish reference (control) points, assess the risk, develop and implement corrective actions. Research methods. The mind-activity methodology is the basic method for research. Application to the risk management process of testing laboratory activities. The results of the study. The levels of the hierarchy are determined by the level of consequences (low, high, medium) from the onset of a negative situation. The phases are determined by the type (category) of risk by the stage of its determination. Forecasted risks are determined by the method of forecasting for a certain future period of time (for example, the next calendar year). In fact, identified are risks that have been identified and are aimed at the short-term perspective of their emergence. Not detected - risks remain identified and arise from the implementation of inappropriate preventive measures. These risks are stipulated by the uncertainty of the input information in the analysis of risks and the inadequacy of measures to eliminate possible negative consequences. The proposed risk classification system makes it possible to compile a “risk profile” of the laboratory. The "Risk-Profile" of a laboratory is a conditional indicator that characterizes the laboratory's ability to possibly provide unreliable test results. Conclusions. The mind-activity methodology was used. Principles, classification and risk assessment method have been developed for the testing laboratory. This made it possible to establish the relationship between the level of risk, its source and the period of exposure, as well as to identify the most vulnerable elements of the management system at a given time and to find ways to improve and search for opportunities. The scientific value of the study lies in the substantiation of the principles classification and method of risk assessment of the testing laboratory. The practical value of the study lies in the possibility of forming a "risk profile" of the laboratory, provides objective information about the current state of the laboratory management system and indicates possible ways of improvement.

Goal of the study – development and implementation of provisions for further updating and improvement of the components of the mechanism of application of Technical Regulations on type-approval of agricultural or forestry tractors, their trailers and interchangeable towed machinery, together with their systems, components and separate technical units, approved by the Resolution of the Cabinet of Ministers of Ukraine dated 28.12.2011 № 1367 (hereinafter – Technical Regulation 1367/2011), using the results of research carried out in L. Pogorilyy UkrNDIPVT in relation to the type approval system in the sector of agricultural and forestry vehicles, and an analysis of the main regulatory and methodological aspects of the type approval of the specified equipment. Research methods are to study, analyze, compare, summarize and evaluate data, including the comparative law method used in the analysis of domestic and European legislation in the field of assessment and verification of conformity (type approval) of agricultural and forestry vehicles. Results. The results of updating the mechanism of application of the current Technical Regulation 1367/2011 have been received and implemented. Resolution of the Cabinet of Ministers of Ukraine of 04.12.2019, № 1168 was adopted and implemented, which amended the Technical Regulation 1367/2011 and the procedure for departmental registration of agricultural and forestry vehicles, proposals for which were prepared based on the research results of the L. Pogorilyy UkrNDIPVT. Developed, reviewed and approved by the order of the Ministry of Economy dated 30.12.2020 № 2810 updated List of national standards for the purposes of application of the Technical Regulation 1367/2011, which sets requirements for these vehicles, their systems, components and separate technical units . Proposals have been prepared for further development of national standards included in the List, based on new versions of international ISO standards. Further steps in the direction of improving the procedures for type approval and entry into service of agricultural and forestry vehicles are identified. Conclusion. Updated and implemented as a result of research requirements and provisions for improving the type approval and registration of agricultural and forestry vehicles are practically used during type approval in accordance with Technical Regulation 1367/2011 and create grounds for improving safety, reducing the negative impact of these vehicles on human, animal and environmental health, simplify procedures for verification of their conformity and registration, introduce gradual approximation to European standards, including on environmental indicators.