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Bintang Nidia Kusuma
Sekolah Tinggi Teknologi Wastukancana
Computer Science & IT Decision Sciences, Operations Research & Management Industrial & Manufacturing Engineering Mechanical Engineering Other

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Analisis Metode Just In Time (JIT) Terhadap Efisiensi Biaya Persediaan Suction Tube di PT> Rama Mulia Sentosa Rengga Purawa; Muhammad Ali Akbar; Bintang Nidia Kusuma
Jurnal Teknologika Vol 16 No 1 (2026): Jurnal Teknologika
Publisher : Sekolah Tinggi Teknologi Wastukancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51132/teknologika.v16i1.671

Abstract

This study analyzes the application of the Just In Time (JIT) method toward inventory cost efficiency of suction tubes at PT. Rama Mulia Sentosa, an industrial component distributor in Purwakarta. The main problem faced is high inventory costs due to excessively frequent ordering with small quantities, causing waste in storage costs and trapped working capital. This study aims to analyze inventory management conditions before and after JIT implementation, as well as to determine the effectiveness of the method. Suction tube inventory data for January–December 2025 was processed using three approaches: conventional company policy, Economic Order Quantity (EOQ) method, and Just In Time (JIT) method. The calculation results show that the JIT method produces the lowest total inventory cost of Rp 599,833.31 per year, compared to EOQ at Rp 1,469,285.54 and conventional policy at Rp 7,266,922.75. JIT implementation successfully reduced inventory costs by 91.75% compared to the conventional system, with ordering frequency reduced from 48 to 1 time per year. With an average supplier lead time of 5–6 days, the JIT method is considered highly feasible to be implemented at PT. Rama Mulia Sentosa.
Analisis Perawatan Mesin Aftertreatment Menggunakan Metode Overall Equipment Effectiveness (Oee) Dan Six Big Losses Untuk Meningkatkan Efektifitas Mesin Pada PT. XYZ Muhammad Ali Akbar; Dzikry Lukman; Bintang Nidia Kusuma
Jurnal Teknologika Vol 15 No 2 (2025): Jurnal Teknologika
Publisher : Sekolah Tinggi Teknologi Wastukancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51132/teknologika.v15i2.517

Abstract

This study aims to analyze the effectiveness of the AfterTreatment machine maintenance at PT XYZ using the Overall Equipment Effectiveness (OEE) and Six Big Losses methods. The AfterTreatment machine is a crucial part of the rayon fiber production process but has been experiencing a high level of downtime. The OEE method is used to measure machine effectiveness based on three key components: availability, performance efficiency, and quality. Data was collected from machine operations between September 2024 and February 2025. The results show that the average OEE value is 75.99%, which is below the world-class standard of 85%. The primary causes of low OEE are losses due to reduced speed, equipment failure, and idling & minor stoppages. By identifying the loss causes through the Six Big Losses and Fishbone Diagram methods, this research proposes improvements including preventive maintenance planning and enhanced operator training. The study concludes that machine effectiveness can be improved by minimizing major losses and optimizing maintenance strategies.
Co-Authors Dzikry Lukman Muhammad Ali Akbar Rengga Purawa