Manutenção centrada na confiabilidade: uma pesquisa-ação com a aplicação da metodologia FMEA

Abstract

An effective way of maintence management is of great importance for the quality of the operation in industries, where non programmed stops of equipament interfirs directlly on the industrial income. The Reliability Centered Maintence (RCM) pursuits to avoid failures, eliminating the factors that causes those failures on the equipment involved. The Failure Mode and Effect Analysis (FMEA) is a methodology based in analysis methods to treat failures identified in a stipulated time. The presenting paper aims to reduce non programed stops and raise the availability of the equipments involved in the productive process of a grain Warehouse located in the countryside of the state of Goiás. This objetive was accomplished through, at first, the appliance of the Pareto’s Graphic to list the main failures in the database and subsequently, with the development of the FMEA’s metodology for the listed failures. During the process of applying the improvement proposals, feedback was provided to improve the improvements applied, with emphasis on the feedback on the physical change made to the bushing sensor used in the unit, where the final model approved in the field was based on the installation of a acrylic film to prevent the accumulation of dust around the sensor and its improper activation. After finalizing the application proposal, the Pareto Chart was applied again for the unscheduled stops of the productive sector and a comparison of the scenario before and after the development of the FMEA was carried out. After completing the FMEA application, it was possible to reduce the total number of hours of unscheduled downtime in the production sector from 114:02 to 20:14 hours and unscheduled downtime due to “Sensor Disarming” was from 25:12h to 1: 10 am. Finally, the final considerations of this research are developed and future works for the continuity of the research are suggested, where among these future works are: More complex analyzes during the planning of innovation projects; Improvement of the maintenance plans of the unit object of this study and Continuity in the application of the Pareto Chart and the FMEA.