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setiawan, Dibyo
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Analysis of Lead Time Reduction in Pre-Delivery Installation Process of Excavator Units at PT. XYZ Assembly Plant Setiawan, Dibyo; Bintaran, Tubagus Syah Fatahillah Gelagah Wangi; Setiawan, Apri; Ardi, Hanni Maksum; Siahaan, Herbert Hasudungan; Wibowo, Cahyo
Jurnal Konversi Energi dan Manufaktur Vol. 11 No. 1 (2026)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.11.1.5

Abstract

The Pre-Delivery Installation (PDI) Department of PT. XYZ is tasked with carrying out the installation process of imported heavy equipment attachment units, including one of the leading excavator units. Obstacles that arise can affect installation productivity. The gap between the actual installation results of 78 units and the company's target of 156 units requires a solution or resolution to improve the process that can be implemented. Therefore, it is necessary to investigate the wait time associated with decreased productivity, which is the longest component of the installation process. This work has a purpose to analyze lead time of the excavator attachment unit installation process. The method is applied with a time study approach referring to data sheets and observations, then processing lead time data using pie charts, Pareto diagrams, and fishbone diagrams. Furthermore, we review the planning calendar, realization, and improvement engineering. Reduction is carried out by providing additional work personnel and procuring sanding machine tools to reduce the installation and critical time of the planning calendar. The realization condition for 562 minutes with the implementation of improvement engineering is reduced to 318 minutes. Thus, it can speed up implementation time of the excavator attachment in unit installation process to 224 minutes or 44%.
Effectiveness of Epoxy Coating on Metal Surfaces of NEW773CAT Heavy Equipment Units Subeno, Agus; Setiawan, Angga; Okviyanto, Toni; Sumarna, Herlin; Setiawan, Dibyo; Widyawati, Fauzi
Jurnal Konversi Energi dan Manufaktur Vol. 11 No. 1 (2026)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.11.1.6

Abstract

This study investigates the effectiveness of the epoxy coating system on NEW773CAT heavy equipment unit operating in a mining environment. The research primarily focuses on the influence of surface preparation methods, dry film thickness (DFT), and coating type on corrosion resistance and adhesion strength. Field case studies, thickness measurements, and visual inspections were employed to assess the performance of coating system. The results reveal that average coating thickness of 396 μm significantly exceeds the minimum ISO 12944 category C5-I standard, which specifies a DFT of 320-400 μm for high corrosivity environments. The surface preparation process using high-pressure cleaning and power tool cleaning (ST 3.0) was found to produce an ideal substrate for epoxy coating application. The use of high-built epoxy mastic as the primer and Aliphatic Polyurethane as the top coat demonstrated excellent corrosion protection and optimal interlayer adhesion. The spray application technique resulted in a uniform coating with no visible defects. This study emphasizes the importance of combining effective surface preparation and precise coating specifications to ensure long-term protection of metal surfaces in harsh environments. The findings suggest that epoxy coating systems, when correctly applied and prepared, can provide robust protection against corrosion, extending the service life of heavy equipment exposed to aggressive conditions like those found in mining operations.
Co-Authors Abdul Kayi Abdurahman Adri Maldi Subardjah Agung Pratama, Boby Agus Solehudin Agus Suben Agus Subeno Ahmad Kholil Ali Imron Ali Mahmudi Ali Mahmudi Amir Amir Amri Abdulah Angga Setiawan Anggara, Aditya Anggrainy, Rani Apri Setiawan Apri Wiyono Ardi Nugraha ARDI NUGRAHA, ARDI Ardi Rajab, Dede Ardi, Hanni Maksum Aris Suryadi Ariyano Bachtiar, Marsellinus Bantu Hotsan Simanullang Bintaran, Tubagus Syah Fatahillah Gelagah Wangi Bintoro, Waluyo Musiono Budi Triyono Budi Triyono Bunga Muthia Dien Cahyo Wibowo Cahyo Wibowo Cahyo Wibowo Dadang Kurnia Dadang Kurnia, Dadang Destri Muliastri Devi Eka Septiyani Arifin Edward Simanjuntak Enny Widawati Fahmi, Mokhamad Munir Fathan Dewadi Fathan Mubina Dewadi Fauzi Widyawati Ferdiyansyah, Ferdiyansyah Fisika Prasetyo Putra Fisika Prasetyo Putra Gugun Nugraha Hadi Sutanto Hafyyan, Iqbal Handy, Rayhan Aliva Vitra Hanni Maksum Ardi Harry Prayoga Setyawan Haryadi Haryadi - Heri Widiantoro Heryadi, Yadi Ida Ayu Putu Sri Widnyani Iqbal Hidayatullah Iryani, Lenny Istighfari, Nurrahman Jakariya JAKARIYA - - Jakariya, Jakariya Jatira Jatira Jumari Karwansyah , Muhammad Fattan Khairullah Ijlal Khoirudin KURNIASETIAWATI, ANNISA Kusumohadi, Catur Setyawan Maksum Ardi, Hanni Marsellinus Bachtiar Melisa Mulyadi Mohamad Rizkiyanto Mohamad Wirandi Mokhamad Munir Fahmi Mubina Dewadi, Fathan Muhammad Akmal Muhammad Iqbal Harapan Muslim Muhammad Rian Kurniadi Muhammad Yusup Efendi Mulyadi, Yandi Munir Fahmi, Mokhamad Munir Fahmi, Mokhammad Muryanto Muryanto, Muryanto Muzaki, Fadlan Rival Nana Rahdiana Okviyanto, Toni Otong Jaelani Otong Jaelani Panalili T, Ojakma Sihar Pasya, Azdane Peprial Indika Prasetyo Putra, Fisika Prasetyo Qisti, Yafta Raden Roro Yngwistian Jannavis Astie Rahman, Ferli Nur Rama Kurniawan Ramadhan, Kukuh Rani Anggrainy Revi Kusnadi Rifan Mustofa Rifqi Rahmadiansyah Rinaldi, Kardian Rizki Aulia Nanda Rohadi Yusuf Rudy Rafly Safril Septiani, Herviona Setiawan, Apri Shieddieque, Apang Djafar Shieddique, Apang Djafar Siahaan, Herbert Hasudungan Steven Gabriel Romero Subeno, Agus Sugianto Sugianto Sugianto Sukarman Sukarman Sukarman Sumarna, Herlin Sunaryo, Sulistianto Suripto, Heri Suseno, Bella Maharani Marcellia Sutrimo Syamsurizal, Nazmi Syarah Widia Islamiati R Thomas Aquinas J S Thoyib, Ibnu Annas Toni Okviyanto Triyono , Budi Vauzia, Farrah Wicaksono, Yowando Putro Wijayanti, Linda Wuwung, Vicky Yowando Putro Wicaksono Yudrika, Moh Azmil Yuli Asmi Rahman Zainuddin Zainuddin, Zainiddin Zen, Elfiah Fadhilah Zeqy Zulhaqy