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This Author published in this journals
All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Jurnal Teknologi Informasi dan Ilmu Komputer Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer Sinkron : Jurnal dan Penelitian Teknik Informatika Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Vokasi Jurnal Teknik Indonesia Jurnal Rekayasa elektrika Enrichment: Journal of Multidisciplinary Research and Development kawanad PESARE: Science and Engineering Service Journal Jurnal Polimesin Indonesian Journal of Electronics, Electromedical Engineering, and Medical Informatics Mathematics Education Journal Jurnal Pengabdian Rekayasa dan Wirausaha
Yuwaldi Away
Syiah Kuala University
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Transportation Other

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Journal : Jurnal Polimesin

 1 
Implementation of total quality management and importance-performance analysis for technical service optimization in a maintenance workshop : a case study of PT XYZ Khadafi, M; Away, Yuwaldi; Dirhamsyah, M
Jurnal Polimesin Vol 23, No 3 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i3.6860

Abstract

Customer satisfaction is a key factor of success in service-based industries and is equally important in technical service environments such as PT XYZ’s mechanical repair workshop, which provides civil works, welding, machinery, and valve maintenance services. This study aims to assess service quality and identify the primary factors influencing customer satisfaction, with the objective of formulating strategic improvements tailored to the workshop setting. A quantitative research approach was adopted, incorporating the SERVQUAL dimensions and the Total Quality Management (TQM) framework, while customer loyalty was measured using the Net Promoter Score (NPS). The study involved 93 internal respondents from various organizational units, with work experience ranging from less than five years to more than twenty years. Results indicate a high level of satisfaction, with a Net Promoter Score of 57.29% and an Internal Customer Satisfaction (ICS) Index of 86.9%. Multiple linear regression analysis showed that service quality and Total Quality Management collectively explained 84.3% of the variance in customer satisfaction. Importance and Performance Analysis (IPA) identified education and training, customer focus, and reliability as the top strategic improvement priorities. From an operational perspective, the most frequently requested services included pump shaft fabrication (item code 63-GA-6004, 30 hours), shaft sleeve fabrication (63-GA-6004, 16 hours), and shaft sleeve fabrication (56-GA-4002, initially 36 hours). Following the implementation of these improvements, the workshop achieved a 20 percent reduction in average processing time and completed 182 service activities within two months, significantly enhancing operational efficiency and customer satisfaction.
Reliability enhancement in petrochemical industry: an integrated RBD and FTA approach Ariandi, Teuku; Away, Yuwaldi; Dirhamsyah, Dirhamsyah
Jurnal Polimesin Vol 23, No 4 (2025): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i4.7210

Abstract

Turnaround maintenance plays an important role in the petrochemical industry, directly influencing production reliability and operational continuity. Unplanned shutdowns and service disruptions can result in significant economic losses, yet statistics show that nearly 80% of turnaround activities fail to achieve their performance targets in terms of time, cost, safety, quality, and environmental compliance. This study addresses these challenges by evaluating and enhancing the reliability of the ammonia production system at an Indonesian petrochemical company through an integrated approach combining the Reliability Block Diagram (RBD) and Fault Tree Analysis (FTA). RBD modeling was used to represent the production system as functionally arranged blocks, while FTA was applied to identify root causes of failures. Analysis using ReliaSoft BlockSim and Weibull++ revealed that the system’s reliability was only 0.029 over 5,000 hours, far below the target reliability of 0.9. The most critical components were identified as the Primary Reformer, Ammonia Compressor, and Syngas Compressor. Seven improvement scenarios were simulated, with results showing that the combination of preventive maintenance (PM) and load-sharing configuration yielded the most effective outcome. This approach improved reliability to 0.076 and availability to 0.812. The results show that a proactive, reliability-based maintenance strategy combined with system redundancy can substantially reduce risks of unscheduled shutdowns, extend turnaround intervals, and improve production uptime. Furthermore, the integrated RBD-FTA approach provides a robust framework for proactively identifying and addressing vulnerabilities in complex petrochemical systems.
Co-Authors . Zulfan Ahmadiar, Ahmadiar Alfisyahrin ANISAH Ariandi, Teuku Azizah, Nadiatul Bahri, Al Bakhtiar, Dandi Basir, Nurlida Chairullah, Chairullah Cut Dewi, Cut Dirhamsyah, Dirhamsyah Dirhamsyah, Muhammad Fahmi Fahmi Fathurrahman Fathurrahman Firdaus Firdaus Fitri Arnia Gunawan, Doni Hasanuddin, Iskandar Herawati, Rama Husni Husni Ikramullah, Ikramullah Ira Devi Sara Irwansyah Irwansyah Jalil, Asri Muhammad Jamil, M. Kahlil, Kahlil Khadafi, M Khairul Munadi Leo, Hendrik lestari, mulia Lubis, Rakhmad Syaputra Lulusi Lulusi M. Dirhamsyah Mahdi Syukri Mahmuddin Mahmuddin Mailizar Masri Ibrahim Maulana, Edi Melinda Melinda Mina Rizky, Muharratul Mirza Rahmat, Muhammad Misbahuddin Misbahuddin Moulina, Aisyah Rayhan Muhammad Irhamsyah Muslimsyah Muslimsyah, Muslimsyah Muzawwir, Hendra Nargaza, Juanda Nasaruddin Nasaruddin Novandri, Andri Nuzula, Mukhsin Oktiana, Maulisa Putra, T. Edisah Rahmah Johar Ramdhana, Rizka Raziah, Isyatur Rizal Munadi Rudiansyah Putra Saddami, Khairun Safrizal Safrizal Safwan Saifuddin Muhammad Jalil Siregar, Ramdhan Halid Sofyan, Sarwo Edhy Sri Rahmawati Suhaeri Suhaeri, Suhaeri Suriadi Syahriza, Syahriza Syahrizal Syifaul Huzni Syukriyadin Tamlicha, Akram Udink Aulia Wardana, Surya Wong, W. K Yudha Nurdin Yunidar Yusria Darma Zichri, Zichri