Construction of aggregated measure for efficiency assessment of activities designed for improving the security of electricity units
The paper demonstrates how the Randomized Aggregated Indices Method (RAIM) can be applied for the purpose of quality measurement (safety, efficiency, effectiveness, etc.) in case of the complex units in electricity sector. Particularly, RAIM is used for efficiency assessment of activities designed for improving the security of transmission in local electricity network. The sample of objects under consideration includes fixed alternative arrangements consisting of respective activities (i.e., inspection of electrical equipment by heat sensors, personnel emergency training, preventive maintenance of the nodes, etc.). The extent to which each activity is accomplished serves as the parameter affecting the quality (efficiency) level the object. Setting the hierarchy of separate and aggregated randomized indices provides the required frame for the synthesis of ultimate overall measure assessing the efficiency of activities' arrangements undertaken for security improvement. The efficiency measure is estimated under two different conditions: (1) of full absence of expertise on comparative importance of the indices, and (2) of availability of such information specified in the form of the system of equalities and inequalities for weighting coefficients. Comparing the estimates reveals the influence of experts' nonnumeric information on accuracy, reliability and validity of the constructed aggregated indices.
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