Electronic Theses and Dissertation

Abstrak
Penelitian ini dilakukan di CV. HILUX 57 STEEL yang bergerak di bidang pemotongan plat logam, dengan fokus pada analisis perawatan mesin CNC Plasma Cutting sebagai salah satu peralatan utama dalam pemotongan plat logam. Permasalahan yang dihadapi perusahaan yaitu meningkatnya frekuensi kerusakan mesin dan tingginya waktu downtime akibat sistem perawatan yang belum terencana dengan baik. Penelitian ini bertujuan untuk menentukan strategi pemeliharaan yang optimal dengan menggunakan metode Reliability Centered Maintenance (RCM) sebagai dasar pengambilan keputusan dalam pengelolaan perawatan mesin. Analisis dilakukan dengan mengidentifikasi komponen kritis, menilai tingkat risiko kegagalan menggunakan Failure Mode and Effect Analysis (FMEA), Menghitung efektivitas mesin melalui Overall Equipment Effectiveness (OEE). Hasil penelitian menunjukkan terdapat delapan komponen utama yang berpotensi mengalami kegagalan, yaitu torch assembly, power supply, CNC controller dan drive axis, dengan nilai RPN tertinggi terdapat pada pengukur mata torch sebesar 240 yang termasuk kategori Outage Problem (B). Nilai OEE CNC Plasma Cutting menunjukkan rata-rata efektivitas di atas 85% yang telah memenuhi standar world class. Berdasarkan hasil analisis RCM, dirancang strategi perawatan yang terdiri dari kombinasi time directed task, condition directed task, dan failure finding task, serta disusun prosedur pemeliharaan terstandar agar perusahaan dapat menekan downtime, meningkatkan keandalan mesin, dan menjaga efisiensi proses produksi secara berkelanjutan.
Kata Kunci : Reliability Centered Maintenance (RCM), CNC Plasma Cutting, FMEA, Overall Equipment Effectiveness (OEE).

Abstract This research was conducted at CV. HILUX 57 STEEL, a company specializing in metal plate cutting, focusing on the maintenance analysis of the CNC Plasma Cutting machine as one of the main pieces of equipment used in metal plate cutting. The problems faced by the company include an increasing frequency of machine failures and high downtime due to a poorly planned maintenance system. This study aims to determine the optimal maintenance strategy using the Reliability Centered Maintenance (RCM) method as a basis for decision-making in machine maintenance management. The analysis was carried out by identifying critical components, assessing the level of failure risk using Failure Mode and Effect Analysis (FMEA), and calculating machine effectiveness through Overall Equipment Effectiveness (OEE). The results show that there are eight major components prone to failure, namely the torch assembly, power supply, CNC controller, and drive axis, with the highest RPN value found in the torch eye sensor (torch leveling) at 240, which is categorized as an Outage Problem (B). The average OEE value of the CNC Plasma Cutting machine is above 85%, meeting the world class standard. Based on the RCM analysis, a maintenance strategy was designed consisting of a combination of time directed task, condition directed task, and failure finding task, along with standardized maintenance procedures to enable the company to reduce downtime, enhance machine reliability, and ensure sustainable production efficiency. Keyword : Reliability Centered Maintenance (RCM), CNC Plasma Cutting, FMEA, Logic Tree Analysis (LTA), Overall Equipment Effectiveness (OEE).