Aplicação do World Class Maintenance (WCM) na manutenção de máquinas de colheita da madeira

Abstract

This work object to evaluate the applicability of the tool World Class Maintenance (WCM) in the maintenance of wood harvester machine, trough the pertinent comparison indicator between the process of the Traditional maintenance and WCM. The searching was realized in the company Klabin S.A., located in Telemaco Borba, Parana. It was realized the comparative analysis between the process of maintenance through the available mechanic operators, consume of hydraulic oil and costs of the machine maintenance feller buncher, skidder and harvester processor (Traditional and WCM). Following, it was proceeded an analysis of the specific WCM process, like: medium time between failures (MTBF), medium time to repair (MTTR), index of proactive (IPR) and index of reactive (IRE) in the levels of implantation stages, amateurishness and stabilization. By the end it was applied the methodology of good practice to get a knowledge level of the maintenance sector through the questionnaire applied involving 36 indicators in a total with more than 300 good practicing in three levels, being: technic and human management. The results indicated that the available mechanic and the hydraulic oil consume were superior in the maintenance process WCM, with the significant difference by the test of Tukey (P<0,05). However, the costs in the process WCM presents an average of R$ 0,08/m³ above the Traditional process, not significantly defined by the test of Tukey (P<0,05). The process WCM showed useful in the maintenance of the forest equipment, so it applies the preventive maintenance practices, that can get bigger secure and production of the forest operation and process stability, and yet, getting the obtainment of bigger useful life of the equipment. The indicators medium time between failures (MTBF) and medium time to repair (MTTR) were 34,5 and 2,9 hours respectively, that means, the average to each 34,5 hours the equipment represented some kind of fail, with the time of repairing of 2,95 hours. The index of proactive maintenance (IPR) presented the three studied equipment an increasing after the amateurishness stage, showing significantly superior by the test of Tukey (P<0,05). After the application of the methodology of good practicing, It was identified that the level of maintenance of the company found in the first level world class, that it could get better result in the future after the identification of the operative problems in getting better in the continuation of the process.