Conclusions
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1.
For an objective assessment of the qualities of main mine ventilator plants, we must take account of the minima of three levels of interests in their functioning—the user, the manufacturer, and the national economy.
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2.
An algorithm for calculating numerical quality indices (quality index) for ventilator plants must take account of a hierarchy in the distribution of the interests of the user, the manufacturer, and the interests of the state (national economy).
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3.
On all levels of quality calculation the weighting factors of the characteristics and indices should as far as possible be defined in terms of the ratios of existing costs, and only in exceptional cases should expert judgment be appealed to.
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Literature Cited
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A Working Method of Estimating the Quality Levels of Main Mine Ventilators [in Russian], Dongiprouglemash, Donetsk (1972).
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Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 38–46, July–August, 1975.
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Petrov, N.N. Methods of assessing the efficiencies of mine ventilation plants. Soviet Mining Science 11, 336–343 (1975). https://doi.org/10.1007/BF02499292
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DOI: https://doi.org/10.1007/BF02499292