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of how a powerful tool can be metrology for engineers, not only for validation of models but also providing better knowledge of the parameters that have a greater influence on both the model and the experiment. The designer is thus aware of the aspects that can be improved to minimize the difference between the model and experiments or the limits he cannot surpass in using the model according to the design criteria." Nevertheless, many QIs are identified by applying expert measurement methods with appropriate peculiarities.High reliability of the results of such measurements is a pledge of an effective functioning of the quality management system. Therefore, the development of a methodical apparatus to determine and assess uncertainty of expert measurements is of topical significance. Analysis of previous studies and statement of the problemThere are no generally-adopted conventional recommendations for managing uncertainty of expert evaluations.

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The authors offer to solve the problem of providing traceability of measurements by increasing metrological autonomy of in-plant measuring systems. The paper shows the expedience of increasing metrological autonomy by creating a "virtual" reference. There are analysed possible variants of implementation of the "virtual" reference, which will provide high metrological stability of measurements at insignificant additional expenses. The authors point out the necessity of creation of universal technical and programmatic means of mutual comparison for the in-plant measuring systems to increase the reliability of measurements in the conditions of metrological autonomy.

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