An Integrated Fuzzy Analytical Hierarchical Process and Fuzzy Grey Relational Analytical Model with Vikor for Maintenance System Appraisal

Sunday Ayoola Oke


The motivation for this research lies in the understanding that the evaluation of a maintenance department for a manufacturing organization strongly depends on a wide range of uncertainties and vague parameters. Consequently, utilising intuition may not be technically correct and downplays on the supposed results for the right management decisions on maintenance. The need for a new method to correct this anomaly is very much pressing to enhance the performance of maintenance systems. In this paper, the fusion of fuzzy analytical hierarchy process with fuzzy grey relational analysis as well as VIKOR is presented. A measuring instrument, questionnaire, for evaluating the performance of maintenance systems was developed and administered in four companies. Using the pair-wise comparisons of criteria relevant to systems reliability, profitability, lead-time, system safety, production cost and manufacturing goals, the crisp values for the major components were generated. Computation of the grey relational grade, best and moist values, utility regret measure and VIKOR index, and finally the ranking of the maintenance system were made. The approach is feasible in maintenance system evaluation. The unique and innovative approach that established a link between maintenance system’s goals and variables when dealing with maintenance system appraisal is the main novelty of the work. An additional novelty not reported earlier in literature is the consideration of human attributes and environments in an integrated manner. This study contributes a significant approach for correctly evaluating the technical aspects of the maintenance system.

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