IMPROVEMENT OF PREVENTIVE MAINTENANCE PLAN OF NEW ELEVATOR PRODUCT

Abstract

Using of offshore manufacturing and offshore suppliers for new elevator product is a strategy of multinational elevator's company to focus on both cost reduction and company's core competency. However after this strategy has been used in new elevator product, there were a number of elevator's failures which mainly caused from poor preventive maintenance on elevator's door system. The objective of the research was to develop an improved preventive maintenance plan of door system of new elevator product instead of corrective maintenance. The methodology of the research was performed based on Failure Mode and Effect Analysis (FMEA). FMEA was used for identifying potential failure modes of door system and assigning Risk Priority Number (RPN) in order to create an improvement of preventive maintenance plan. RPN setting was used for revising preventive maintenance schedule, revising preventive maintenance checklist, creating troubleshooting manual and developing training course & evaluation system. The result shows that a number of elevator's failures from door system was reduced from 62.5% of total failures to 20% of total failures for old unit and number of elevator's failure from door system is equal to 0 for new unit. As occurrence is reduced, new PRN is reduced. It is proved that the result is in accordance with objectives.