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All Journal Teknik Mesin "TEKNOLOGI" Specta Journal of Technology Logistik Jurnal Abdi Insani G-Tech : Jurnal Teknologi Terapan Journal of Advanced in Information and Industrial Technology (JAIIT) Sinergi International Journal of Logistics Jurnal Industri dan Inovasi (INVASI) Jurnal Pengabdian Masyarakat Mentari
Willis, Tito Bisma May
Institut Teknologi Kalimantan, Indonesia
Religion Agriculture, Biological Sciences & Forestry 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 Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Social Sciences Transportation Other

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A Multi-Period MILP Model for Multi-Origin, Multi-Echelon CPO Distribution: A Case Study of PTPN IV–PT INL Mirsalurriza Mukhajjalin; Muhammad Mashuri; Tito Bisma May Willis; Dean Tirkaamiana
Sinergi International Journal of Logistics Vol. 4 No. 3 (2026): August 2026
Publisher : Yayasan Sinergi Kawula Muda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61194/sijl.v4i3.1059

Abstract

Efficient crude palm oil (CPO) distribution is essential for maintaining the competitiveness of vertically integrated palm oil industries. This study addresses a multi-origin, multi-echelon CPO distribution problem involving 37 internal palm oil mills, external suppliers, dual operational hubs, and refinery capacity constraints at PT Industri Nabati Lestari (INL). A multi-period Mixed Integer Linear Programming (MILP) model is developed within a Minimum Cost Flow (MCF) framework to optimize CPO allocation to INL and Belawan Port. The model incorporates daily production data over a one-year horizon, refinery throughput limits, inventory carry-over, binary operational decisions, and transportation costs. The model was solved using the HiGHS solver with a Branch-and-Cut algorithm across nine refinery-throughput scenarios ranging from 1,800 to 4,500 tons/day (40%–100% utilization), comprising 108 monthly sub-problems. All sub-problems reached true optimality with a final MIP gap of 0.00%, with an average runtime of approximately one minute per sub-problem. Under the representative Q = 1,800 tons/day scenario, which most closely reflects the company’s 2025 operating conditions, the optimized annual logistics cost was Rp335.46 billion, with a unit transportation cost of Rp129.78/kg, compared with the historical cost of Rp162.58/kg, representing a reduction of Rp32.80/kg or 20.2%. At Q = 4,500 tons/day, the annual transportation cost decreased to Rp308.49 billion. The results demonstrate that prioritizing low-cost internal suppliers while using external suppliers to compensate for seasonal shortages can reduce transportation costs. The proposed framework provides decision support for supply allocation, inventory planning, transportation management, and refinery capacity utilization in large-scale palm oil supply chains.
Penguatan Partisipasi Masyarakat melalui Pengembangan Perpustakaan Mini sebagai Ruang Literasi dan Belajar Warga di RT 53 Balikpapan Utara Rizky Nur Rahman; Denny Huldiansyah; Tito Bisma May Willis; Ganing Athallah Sulie; Muhammad Al Farisi H Silondae; Imron Risalfar Atmuzaini; Muhammad Sarma Hidayat; Naura Arum Rahmadani; Muhammad Ramadani Mundirman; Muhammad Salman Alfarisi
Jurnal Pengabdian Masyarakat Mentari Vol. 3 No. 3 (2026): Oktober
Publisher : Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpmm.v3i3.418

Abstract

Ketersediaan fasilitas literasi di lingkungan permukiman menjadi salah satu tantangan dalam meningkatkan akses masyarakat terhadap bahan bacaan dan ruang belajar informal. Di RT 53 Balikpapan Utara, aktivitas belajar masyarakat, khususnya anak-anak dan remaja, belum didukung oleh sarana literasi yang memadai di lingkungan tempat tinggal. Kegiatan pengabdian kepada masyarakat ini bertujuan mengembangkan Ruang Literasi Warga melalui penyediaan perpustakaan mini sebagai pusat belajar lingkungan yang mudah diakses masyarakat. Pelaksanaan kegiatan dilakukan melalui empat tahapan, yaitu persiapan dan identifikasi kebutuhan bersama perangkat RT dan masyarakat, perancangan serta penataan ruang, implementasi penyediaan fasilitas dan koleksi bacaan, serta pendampingan dan sosialisasi pemanfaatan perpustakaan. Sasaran kegiatan adalah masyarakat RT 53, dengan perhatian khusus pada anak-anak dan remaja sebagai pengguna ruang literasi. Hasil kegiatan berupa terbentuknya perpustakaan mini sebagai Ruang Literasi Warga yang dilengkapi fasilitas baca, rak buku, dan koleksi bahan bacaan, serta terselenggaranya pendampingan pemanfaatan dan pengelolaan ruang bersama masyarakat. Kegiatan ini memberikan nilai tambah melalui pemanfaatan potensi ruang lingkungan sebagai fasilitas pendidikan informal berbasis komunitas dan mendorong keterlibatan warga dalam keberlanjutan pengelolaannya.
Co-Authors Ade Aisyah Arifna Putri Ahmad Jamil Anis Rohmana Malik Anis Rohmana Malik Archangela Adelina Athaya Nur Khayyirah Dean Tirkaamiana Denny Huldiansyah Dwila Sempi Yusiani Enggaling Aji Dewanata Fahri, Anwar Ganing Athallah Sulie Hendrik Vicarlo Saragih Manihuruk Imron Risalfar Atmuzaini Michael Alexander Hutabarat Miftah, Tarizza Alya Nurul Mirsalurriza Mukhajjalin Muhammad Al Farisi H Silondae Muhammad Farhan muhammad mashuri Muhammad Ramadani Mundirman Muhammad Salman Alfarisi Muhammad Sarma Hidayat Naura Arum Rahmadani Novita Lizza Anggraini Nur Irhamni Sabrina Pasaribu, Melly Rosinta Rahmawati, Sri Rizky Nur Rahman Rizky Nur Rahman Sakti, Angga Yuda Sandra, Al Dian Devina Septi Ayu Angrayni Siti Ruqaiyah Baharuddin Yifrans Sastra Wiguna Zelania In Haryanto