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All Journal JAIS (Journal of Applied Intelligent System) OPERATION EXCELLENCE: Journal of Applied Industrial Engineering Jurnal Sistem dan Manajemen Industri SEINASI-KESI AMALIAH: JURNAL PENGABDIAN KEPADA MASYARAKAT Jurnal Review Pendidikan dan Pengajaran (JRPP) Jurnal Optimalisasi Jurnal Teknik Industri Terintegrasi (JUTIN) Madaniya Journal of Informatics, Information System, Software Engineering and Applications (INISTA) Jurnal Pengabdian kepada Masyarakat Nusantara Jurnal Penelitian Inovatif Pelita Teknologi : Jurnal Ilmiah Informatika, Arsitektur dan Lingkungan Jurnal Teknik Industri Jurnal Ilmu Multidisplin Indonesian Journal of Multidisciplinary on Social and Technology Ranah Research : Journal of Multidisciplinary Research and Development Jurnal Pelita Pengabdian Journal of Mandalika Social Science SAINTEK
Adi Rusdi Widya
Universitas Pelita Bangsa, Jawa Barat, Indonesia
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy 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 Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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Implementation of Just in Time to Reduce Lead Time and Improve Production Efficiency: A Case Study at PT Toyota Boshoku Indonesia Eman Rusmana; Adi Rusdi Widya; Christa Dian Pratiwi
Journal of Mandalika Social Science Vol 4 No 1 (2026): Journal of Mandalika Social Science
Publisher : Mandalika Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/jomss.v4i1.402

Abstract

This study aims to analyze and implement the Just In Time (JIT) method to reduce production lead time and improve production efficiency in the Headrest IMV production line at PT Toyota Boshoku Indonesia. The research employs an applied research approach using Value Stream Mapping (VSM) to identify inefficiencies and design process improvements. Data were collected through direct observation, interviews, documentation, and time studies to evaluate the current production condition and measure performance improvements after JIT implementation. The results indicate that the initial production system, which operated under a push-based approach, experienced significant inefficiencies, including high waiting time, excessive Work In Process (WIP), and unbalanced workflow. After implementing JIT, production time per unit decreased from 13.2 minutes to 9.5 minutes, representing a 28% improvement. In addition, WIP levels were significantly reduced, and the production system transitioned into a pull-based system supported by Kanban. Layout redesign and work standardization further enhanced material flow and process stability. The implementation results also demonstrated improvements in key performance indicators, including reduced production lead time, shorter cycle time, lower WIP levels, and increased overall production efficiency. In conclusion, the implementation of JIT integrated with VSM effectively reduces production lead time, minimizes waste, and improves overall production efficiency. This study provides practical and empirical insights into the application of Lean Manufacturing principles in real industrial settings.
Analisis Pengendalian Persediaan Bahan Baku Stearine Menggunakan Metode EOQ Pada PT XYZ Della Ananda Haryanti; Adi Rusdi Widya; Christa Dian Pratiwi
Indonesian Journal of Multidisciplinary on Social and Technology Vol. 4 No. 2 (2026): Maret - Juni
Publisher : PT Ilmu Data Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69693/ijmst.v4i2.8408

Abstract

Pengelolaan stok bahan baku termasuk hal yang krusial dalam memastikan kelancaran proses produksi dan optimalisasi biaya pada industri manufaktur. Permasalahan yang dialami oleh PT XYZ yaitu masih kurang efektif pada pengelolaan stok bahan baku RBD stearine, yang ditandai dengan frekuensi pemesanan yang tinggi serta potensi kekurangan bahan baku yang dapat mengganggu aktivitas produksi. Penelitian ini dimaksudkan untuk mengkaji implementasi metode Economic Order Quantity (EOQ) dalam menetapkan kuantitas pembelian yang paling efisien, serta menghitung persediaan pengaman, titik pemesanan kembali, serta minimum dan maksimum stok. Pendekatan kuantitatif dengan analisis deskriptif digunakan sebagai metode dalam penelitian ini, lalu selain itu juga menggunakan data historis perusahaan yang diolah dengan metode EOQ. Berdasarkan hasil analisis, diperoleh bahwa kuantitas pembelian yang efisien sebesar 1.529.706 kg dengan tingkat pembelian bahan baku selama satu tahun sebanyak 23 kali, lebih efektif dibandingkan dengan ketentuan perusahaan sebelumnya. Selain itu, diperoleh nilai safety stock sebanyak 8.592.695 kg, titik pemesanan kembali (ROP) ketika mencapai nilai 9.321.568 kg, total inventory cost sebesar Rp 6.941.807, serta maksimum stok sebanyak 10.122.401 kg. Penggunaan metode EOQ juga dapat meminimalkan total inventory cost sehingga pengelolaan menjadi lebih efektif dan efisien. Metode EOQ mampu mendukung upaya perusahaan dalam mengoptimalkan pengendalian stok bahan baku. Oleh karena itu, perusahaan dianjurkan untuk mengimplementasikan metode EOQ secara berkelanjutan atau konsisten, serta melakukan evaluasi berkala guna meningkatkan akurasi perencanaan kebutuhan bahan baku.
Co-Authors Adnan, Haidar Bustomi Agus Suwarno, Agus Akbar Ikbal Akbar, Ikbal Amin Solihin, Amin Andini Putri Riandani Andri Firmansyah Anggara, Muhammad Hatta Ari Antika Zahrotul Kamalia Antika Zahrotul Kamalia Asep Arwan Sulaeman Christa Dian Pratiwi Christa Dian Pratiwi Darmawani, Heru Darmawani Della Ananda Haryanti Dwi Irwati Edora, Edora Efendi L, Rudi Eman Rusmana Fabyan Hijri Satrio Fajar Rudiyanto Febrinasari, Tantry Fibi Eko Putra Hasyrani Windyatri Hidayat, Ade Nurul Hidayat, Ade Nurul Hidayat Ikhsan Romli Intani, Arvita Emarilis Irawan, Teddy Kenedy, John Kustiwan, Susan Maghfur, Abdullah Maharani Rahmawati Maulidani, Bagas Caesar Mohamad Fatur Ramdan Muhamad Yusup Muhammad Fatchan Nawangsih, Ismasari Nida An Khofiyah Nurhidayanti, Nisa Prasetya, Dwi Indra Putra, Fibi Eko Putra, Ramadhani Cahyono Putri Anggun Sari Putri, Nicky Rahardjo, Sugeng Budi Ramdan, Mohamad Fatur Resi Khalisya Wildani Sari, Putri Anggun Simarmata, Leo Tubagus Siti Rahayu Sugeng Budi Raharjo Suhendra Sulaeman, Asep Arwan Supriyanti Supriyanti Supriyati Supriyati . Supriyati Supriyati Supriyati Supriyati Syaputra, Hendra Arya Tri Ngudi Wiyatno Wardana, Muhammad Dava Yuliani, Opie Oktavia Zahra, Astri