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All Journal Jurnal Ilmiah Wahana Pendidikan Jurnal Teknik Industri
PURBA, AXEL GRACETO
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Religion Control & Systems Engineering Education Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Other

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PENGENDALIAN PERSEDIAAN DAN PENJADWALAN PASOKAN BAHAN BAKU IMPOR DENGAN METODE ABC DI PT X PURBA, AXEL GRACETO; SIMANJUNTAK, MARIANA
JURNAL TEKNIK INDUSTRI Vol 13 No 1 (2024): JURNAL TEKNIK INDUSTRI
Publisher : Universitas Dirgantara Marsekal Suryadarma

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Inventory control becomes a very important activity in a company because the cost of inventory can reach about 20% to 40% of the total annual value. Inventory is a capital or company asset consist of raw materials, work in process and finished product. Currently, the value of inventory at PT X Indonesia Savory Factory has exceeded the maximum target of the company but some raw materials have shortage or stock-out, meaning that the current inventory condition is inefficient because the company invests too much in inventory but the shortage of inventory for certain raw materials still occurs. This is the reason why it is necessary to improve inventory efficiency. Improvements were made by utilizing ABC inventory analysis method and arranging and scheduling raw material supply as needed, then making priority scale of raw material improvement on ABC inventory analysis based on class A, B and C. The research was continued by rescheduling the tracking delivery and counting time frozen horizon which is the amount of time it takes raw materials during the distribution process or delivery process, so the frozen horizon is smaller than lead time. By performing fixed order interval on class A and fixed order quantity raw materials for class B and C raw materials, the quantity of imported raw materials gradually adjust to the needs and the high value of the company’s inventory can be reduced gradually as well. The end result is the risk of shortage can be reduced as much as 26%, overstock can be reduced by 12% and in total overall value over value inventory can be decreased as much as 23%.Keywords: inventory, ABC inventory analysis, fixed order interval, fixed order quantity, frozen horizon PENDAHULUA
Peningkatan Profitabilitas Produksi Melalui Pemodelan Sistem Dinamik Dengan Menggunakan Ventana Simulation (Studi Kasus: Pabrik Tahu XZY) Napitupulu, Putri Dian Selasih; Turnip, Yola Gabriella; Purba, Axel Graceto; Silalahi, Fitriani Tupa Ronauli
Jurnal Ilmiah Wahana Pendidikan Vol 11 No 7.D (2025): Jurnal Ilmiah Wahana Pendidikan 
Publisher : Peneliti.net

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Indonesia memiliki industri makanan berbasis kedelai yang berkembang pesat, dengan tahu sebagai salah satu produk pangan tradisional yang populer. Pabrik Tahu XYZ menghadapi tantangan dalam manajemen produksi dan profitabilitas akibat fluktuasi harga kedelai dan pesanan tertunda. Penelitian ini bertujuan untuk mengembangkan model simulasi sistem dinamik menggunakan Ventana Simulation guna meningkatkan profitabilitas pabrik. Metode penelitian mencakup analisis kebutuhan, perancangan causal loop diagram dan stock and flow diagram, formulasi model, skenario simulasi, serta verifikasi dan validasi model. Hasil penelitian menunjukkan bahwa dengan fokus pada pengurangan biaya produksi dan biaya komersial, perusahaan dapat meningkatkan keuntungan tanpa mengubah volume permintaan. Uji validasi menggunakan Mean Absolute Percentage Error (MAPE) menghasilkan nilai 5,32%, yang mengindikasikan model simulasi sangat baik. Penelitian ini memberikan strategi komprehensif untuk optimasi produksi dan peningkatan profitabilitas dalam industri pengolahan tahu.
Co-Authors Fitriani Tupa R Silalahi Napitupulu, Putri Dian Selasih Simanjuntak, Mariana Turnip, Yola Gabriella