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All Journal Innovative: Journal Of Social Science Research Integrasi: Jurnal Ilmiah Teknik Industri
Revalina, Fanya Aulia
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Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Public Health Other

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Komparasi Metode Economic Order Quantity (EOQ) dan Just In Time (JIT) dalam Strategi Pengadaan Material di PT X Heitasari, Dwi; Revalina, Fanya Aulia
Integrasi: Jurnal Ilmiah Teknik Industri Vol 10 No 2 (2025): Integrasi : Jurnal Ilmiah Teknik Industri
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/integrasi.v10i2.926

Abstract

PT. X merupakan perusahaan vital dalam distribusi gas nasional yang menghadapi tantangan dalam efisiensi pengadaan dan pengendalian persediaan material akibat fluktuasi permintaan. Penelitian ini bertujuan membandingkan efektivitas metode Economic Order Quantity (EOQ) dan Just in Time (JIT) dalam strategi pengadaan material PT. X dengan didukung pendekatan analisis causal loop. Metode penelitian yang digunakan bersifat kuantitatif, didukung analisis kausal untuk mengidentifikasi variabel kunci dalam sistem pengadaan. Hasil penelitian menunjukkan bahwa metode JIT menghasilkan efisiensi biaya persediaan tertinggi, mencapai 81%, dibandingkan EOQ sebesar 48%. Namun, dari sisi biaya pengadaan, EOQ lebih unggul dengan efisiensi 46%, sedangkan JIT menunjukkan inefisiensi karena tingginya frekuensi pemesanan. Perbedaan ini mengindikasikan bahwa efisiensi biaya persediaan tidak selalu sejalan dengan efisiensi biaya pengadaan. Dengan mempertimbangkan faktor keandalan pemasok dan stabilitas permintaan, metode EOQ direkomendasikan sebagai strategi utama karena memberikan keseimbangan terbaik antara efisiensi biaya dan kelangsungan operasional.
Study Of The Addition Of Zno (Zinc Oxide) To The Viscosity Value Of Lubricant Products In The Storage Process Revalina, Fanya Aulia; Neda, Marietta Casta; Akhdan, Gallant Maulana; Khairunnisa, Farida
Innovative: Journal Of Social Science Research Vol. 4 No. 5 (2024): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v4i5.15084

Abstract

This research aims to analyze the effect of adding Zinc Oxide (ZnO) to lubricants on the viscosity changes that occur. In the context of engine lubricants, viscosity is a crucial factor in determining the quality and performance of the lubricant. This study uses the Anton Paar svm 3001 Viscometer to measure viscosity at temperatures of 40ºC and 100ºC, as well as the viscosity index using the ASTM test method (ASTM D445 and ASTM D2270). It is hoped that the results of this research will provide a better understanding of the quality of engine lubricants based on the viscosity index, as well as provide guidance in selecting appropriate lubricant additives to meet established lubricant quality standards. Thus, this research can make an important contribution in improving the quality and performance of lubricants available on the market, as well as ensuring the proper distribution of lubricants that meet quality standards.
Co-Authors Akhdan, Gallant Maulana Heitasari, Dwi Khairunnisa, Farida Neda, Marietta Casta