Electronic Theses and Dissertation

PT. XYZ adalah perusahaan yang berperan sebagai pusat regasifikasi dan distribusi LNG di Indonesia. Peralatan utama dalam proses ini adalah Open Rack Vaporizer (ORV) yang berfungsi mengubah LNG dari fase cair menjadi gas alam menggunakan air laut sebagai media pemanas. ORV menghadapi permasalahan berupa Corrosion Under Insulation (CUI) yang melampaui batas toleransi desain, serta adanya risiko thermal shock. Kondisi tersebut menunjukkan perlunya evaluasi kinerja peralatan secara objektif. Penelitian ini bertujuan mengukur efektivitas proses transformasi LNG pada ketiga unit ORV yaitu E-2302 A, B, dan C menggunakan metode Overall Equipment Effectiveness (OEE) dan Six Big Losses, serta merumuskan usulan perbaikan melalui analisis fishbone diagram. Data yang digunakan merupakan data historis operasional periode Mei hingga Oktober 2025. Hasil perhitungan menunjukkan nilai rata-rata OEE ketiga unit ORV seluruhnya berada di bawah standar world class OEE. Rendahnya nilai OEE sepenuhnya dipengaruhi oleh komponen performance rate dengan nilai rata-rata ketiga unit ORV E-2302 A, B, dan C sebesar 54,83%, 58,15 %, dan 50,77%, sementara availability rate dan quality rate keduanya mencapai 100%. Analisis Six Big Losses menunjukkan bahwa faktor kerugian dominan adalah idle and minor stoppage losses dengan nilai dari ketiga unit ORV A, B dan C sebesar 98,99%, 98,43%, dan 86,45% terhadap total time losses. Analisis fishbone diagram mengidentifikasi lima kategori akar penyebab yaitu faktor manusia, mesin, metode, material, dan lingkungan. Usulan perbaikan yang direkomendasikan meliputi penyusunan jadwal rotasi unit terstandarisasi, penerapan planned maintenance schedule, peningkatan kompetensi operator, serta pengembangan program pemantauan korosi berbasis sensor.

PT Perta Arun Gas plays a strategic role as an LNG regasification and distribution center in Indonesia through the operation of facilities located in Lhokseumawe, Aceh. One of the main pieces of equipment in this process is the Open Rack Vaporizer (ORV), which functions to convert LNG from its liquid phase into natural gas by using seawater as the heating medium. In its operation, the ORV faces problems in the form of Corrosion Under Insulation (CUI) that exceeds the design tolerance limit, as well as the risk of thermal shock. These conditions indicate the need for an objective evaluation of equipment performance. This study aims to measure the effectiveness of the LNG transformation process in the three ORV units, namely E-2302 A, B, and C, using the Overall Equipment Effectiveness (OEE) and Six Big Losses methods, as well as to formulate improvement recommendations through fishbone diagram analysis. The data used in this study were historical operational data from May to October 2025. The results show that the average OEE values of all three ORV units were below the world-class OEE standard. The low OEE values were entirely influenced by the performance rate component, with average values for ORV units E-2302 A, B, and C of 54.83%, 58.15%, and 50.77%, respectively, while both the availability rate and quality rate reached 100%. The Six Big Losses analysis indicates that the dominant source of loss was idle and minor stoppage losses, accounting for 98.99%, 98.43%, and 86.45% of the total time losses in ORV units A, B, and C, respectively. Fishbone diagram analysis identified five categories of root causes, namely man, machine, method, material, and environment. The recommended improvement actions include establishing a standardized unit rotation schedule, implementing a planned maintenance schedule, improving operator competence, and developing a sensor-based corrosion monitoring program.