PENERAPAN METODE FAILURE MODE AND EFFECT ANALYSIS (FMEA) PADA SISTEM PERAWATAN JIG SCREEN KAPAL ISAP PRODUKSI TIMAH

Abstract

The Suction Production Vessel (KIP) Tin 07 owned by PT Timah Tbk relies on the Jig Screen System as a core component for separating cassiterite (tin ore) from waste material based on specific gravity differences. Maintenance of this system has so far been reactive, carried out only after breakdowns occur, resulting in unplanned production downtime and potential financial losses. This final project aims to identify the types, causes, and effects of failures in the Jig Screen System's components, determine high-risk components through Risk Priority Number (RPN) calculations, and develop preventive maintenance recommendations. The method applied is Failure Mode and Effect Analysis (FMEA), with primary data obtained through field observation and technician interviews, and secondary data consisting of historical failure records from 2025. The results show 28 failure events occurred throughout 2025 with a total downtime of 100.5 hours. The FMEA analysis identified the Rotary Screen Segment as the highest-priority component with an RPN value of 378, followed by the Eccentric Bearing with an RPN of 210, while the Jig Eccentric, Rotary Screen Shaft Bearing, and Rotary Screen Grizzly fell into the medium-priority category. Based on these findings, preventive maintenance recommendations were developed, including periodic inspection, lubrication, cleaning, and component replacement before failure occurs, with time intervals tailored to each component. Implementation of these recommendations is expected to reduce failure frequency, decrease downtime, and improve the reliability of the Jig Screen System as well as the continuity of the tin production process.