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Analisa Kelayakan Finansial Pembangunan Pabrik Briket Tempurung Kelapa Oleh PT. Adibakti Perkasa Indonesia Untuk Memenuhi Pasar Ekspor Ana Noor Maulana; Dedy Setyo Oetomo; Rizki Fajar Ramdhani
Journal of Management and Industrial Engineering (JMIE) Vol. 3 No. 1 (2024): MARET
Publisher : LPPM Sekolah Tinggi Teknologi Nusantara Lampung

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PT Adibakti Perkasa Indonesia is a company operating in the MSME sector which produces charcoalbriquette products. In the process of making briquettes, the main raw materials are: coconut shellcharcoal and aci flour as adhesive. This research was conducted to analyze the financial feasibilityof building a new factory (Plant 2) with a production capacity greater than the old factory. based onMarket Aspects, Technical and Production Aspects, as well as Financial Aspects. Based on theresults of data processing, the results obtained are that the company's production capacity forbriquette products is an average of 2100 tons per year, the need for direct labor is 21 employees andindirect employees are 16 employees. Obtained a total investment of Rp. 1,210,025,000, net presentvalue of Rp. 24,268,056.03,- and an internal rate of return of 62%. With a net present value of Rp.24,268,056.03,- ≥ 0 and internal rate of return 62% ≥ MARR, then the investment is declaredfeasible.

Analisa Pemilihan Supplier Dental Unit Poliklinik Gigi dan Mulut Menggunakan Metode AHP dan Topsis Rumah Sakit di Purwakarta Yakub Abdillah; Asep Hermawan; Dedy Setyo Oetomo
Journal of Management and Industrial Engineering (JMIE) Vol. 3 No. 1 (2024): MARET
Publisher : LPPM Sekolah Tinggi Teknologi Nusantara Lampung

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Penelitian ini dilatar belakangi atas kebutuhan Rumah Sakit dalam memilih supplier yang berkualitas serta bisa menjamin kerja sama yang baik satu sama lain, serta ikut mengedepankan kualitas dan kepuasan pasien terhadap pelayanan Poliklinik Gigi Rumah Sakit Di Purwakarta. Berdasarkan metode AHP dan TOPSIS dalam pemilihan supplier dental Unit Poliklinik Rumah Sakit di Purwakarta, didapatkan supplier terpilih yaitu PT.Cobra Dental Indonesia dengan perolehan bobot tertinggi berdasarkan dari metode AHP dan TOPSIS dibandingkan dengan perolehan supplier lainnya. Untuk nilai bobot dari metode AHP yang didapat oleh PT. Dental Cobra Indonesia yaitu 0,323, sedangkan perolehan bobot dari metode TOPSIS yaitu 0,734. Bobot dari masing-masing kriteria adalah untuk kritera harga yaitu 0,092, kemudian bobot untuk kriteria kualitas yaitu 0,123, bobot untuk kriteria lokasi yaitu 0,085, bobot untuk kriteria pelayanan yaitu 0,499 dan bobot untuk kriteria pengiriman yaitu 0,199. Pemilihan supplier dengan menggunakan metode Analytical Hierachy Process (AHP) yang menjadi supplier Dental Unit Rumah Sakit Di Purwakarta terbaik yaitu PT. Cobra Dental Indonesia dengan bobot 0.323. Pemilihan supplier dental unit terbaik dengan metode TOPSIS adalah supplier PT. Cobra Dental Indonesia mendapat dengan perolehan ranking terbesar dengan bobot 0,734. Berdasarkan penerapan metode AHP dan TOPSIS dalam pemilihan supplier dental Unit Poliklinik gigi dan mulut Rumah Sakit di Purwakarta, didapatkan supplier terpilih yaitu PT. Cobra Dental Indonesia dengan perolehan bobot tertinggi berdasarkan dari metode AHP dan TOPSIS dibandingkan dengan perolehan supplier lainnya.

ANALISIS BEBAN KERJA MENGGUNAKAN METODE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION TAKS LOAD INDEX DI PT XYZ PURWAKARTA Aldo Fauzi Dherryawan; Asep Hermawan; Dedy Setyo Oetomo
Journal of Management and Industrial Engineering (JMIE) Vol. 3 No. 2 (2024): SEPTEMBER
Publisher : LPPM Sekolah Tinggi Teknologi Nusantara Lampung

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Currently, companies are required to compete in maintaining the existence of customer satisfaction so that the company can survive amidst intense competition. In order to maintain intense competition, productivity in the production line must be increased. The impact of increasing activity on the production line is that the workload on production employees increases, which causes several problems. One of the problems faced by employees is excessive workload due to physical and mental stress. Conditions like this are being experienced by PT XYZ Purwakarta. From this condition, it is necessary to carry out a workload analysis. One of the appropriate workload methods for this analysis is the National Aeronautics and Space Administration Tax Load Index (NASA TLX) workload analysis method. NASA TLX is a workload analysis method used to analyze the mental workload faced by workers with several indicators that are used as assessments such as mental demand (MD), physical demand (PD), temporal demand (TD), performance (P), effort ( EF) and frustrated level (FR) (Hart & Stavelend, 1988).

Feasibility Study of Aluminum Ingot Manufacturing Plant Development Using Latest Technology with Aluminum Scrap Raw Material and 50,000 TPY Capacity in Cilegon Industrial Area Dedy Setyo Oetomo; Farliana Sutartiah; Akhsani Nur Amalia
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.v15i2.509

This study presents a comprehensive feasibility analysis for establishing an aluminum ingot manufacturing plant in Cilegon Industrial Area, Indonesia, with a production capacity of 50,000 tons per year (TPY) using aluminum scrap as primary raw material. The study encompasses demand assessment for the Indonesian market, supply chain analysis for both raw materials and finished products, evaluation of latest processing technologies, detailed capital expenditure (CAPEX) and operational expenditure (OPEX) calculations, and investment scheme analysis with 60% debt financing and 40% equity investment. The research methodology includes market analysis, technology assessment, financial modeling, and risk evaluation following aluminum smelting industry standards. Results indicate strong market demand with projected growth of 8.5% annually, adequate raw material supply from domestic and regional sources, and competitive advantages through modern reverberatory furnace technology with electromagnetic stirring systems. The total CAPEX is estimated at USD 45.2 million, with annual OPEX of USD 28.7 million. Financial analysis reveals positive net present value (NPV) of USD 12.8 million, internal rate of return (IRR) of 18.2%, and payback period of 6.8 years, confirming project viability. The study concludes that the proposed aluminum ingot plant demonstrates strong commercial and technical feasibility, with robust returns exceeding industry standards and strategic positioning in Indonesia's growing aluminum market

Optimasi Lokasi Staging Area pada Sistem Auto Inbound Berbasis Automated Guided Vehicle (AGV) Menggunakan Analisis Load Distance dan Cycle Time Aditia Prajna Prasetia; Asep Hermawan; Dedy Setyo Oetomo
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 3 (2026): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i3.62021

The development of warehouse automation systems has encouraged the implementation of Automated Guided Vehicles (AGVs) to improve material handling efficiency. However, an inappropriate staging area location may increase material movement distance and operational cycle time in the auto inbound system. This study aims to determine the optimal staging area location in an AGV-based auto inbound system using Load Distance and Cycle Time analysis. The research was conducted at the RMPM warehouse of PT Sanghiang Perkasa by evaluating several staging area alternatives based on material movement distance and AGV operational time parameters. The results show that STG 1 is the optimal location with a cycle time value of 176.274 seconds/cycle, lower than STG 2 at 228.708 seconds/cycle and STG 3 at 295.344 seconds/cycle. The optimization of staging area location can improve the operational efficiency of the auto inbound system

Techno-economic analysis of solar photovoltaic integration as partial substitution of captive coal-fired power in nickel smelters Dedy Setyo Oetomo; Asep Hermawan
SAINTEKS : Jurnal Sain dan Teknik Vol. 8 No. 02 (2026): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v8i02.1132

The Indonesian nickel processing industry, concentrated in the Morowali (Central Sulawesi) and Obi Island (North Maluku) industrial parks, currently relies on captive coal-fired power plants (PLTU captive) to supply approximately 76% of its electricity demand. This dependency creates a structural barrier to decarbonization and exposes nickel exporters to forthcoming carbon border adjustment mechanisms (CBAM) in major destination markets. This study evaluates the techno-economic feasibility of integrating a 200 MWp ground-mounted photovoltaic (PV) plant coupled with an 80 MWh Battery Energy Storage System (BESS) as a partial substitute for captive coal generation in a representative nickel pyrometallurgical smelter (350,000 ton NPI/year, 132 MW captive load, 1,056 GWh/year electricity demand). The analysis combines solar resource assessment using long-term Global Horizontal Irradiation (GHI) data from the Global Solar Atlas (4.85–4.95 kWh/m²/day for the study locations), Levelized Cost of Energy (LCOE) calculation, and capital budgeting using NPV, IRR and Payback Period. Results show that the proposed configuration generates 279.0 GWh/year (substituting 26.4% of smelter consumption), with a total CAPEX of USD 197.76 million and LCOE of USD 0.0944/kWh (IDR 1,510/kWh). The avoided CO? emission reaches 237,155 tons/year. Although the project is not feasible under the current Indonesian carbon price (USD 2/ton, NPV negative), feasibility is achieved at carbon prices of USD 50/ton or above (NPV USD 19.84 million, IRR 11.33%) and becomes highly attractive at CBAM-equivalent USD 70/ton (NPV USD 61.34 million, IRR 14.01%, Payback Period 6 years 8 months). Sensitivity analysis identifies carbon price and PV CAPEX as the most influential variables. The study confirms that PV-BESS substitution is a strategically viable decarbonization pathway when supported by carbon pricing reform and ESG-aligned financing

A Dynamic System Model for Multi-Echelon Inventory Policy Optimization Considering Bullwhip Effect and Supply chain Disruptions in the Sport Footwear Industry Dedy Setyo oetomo; Rizky Fajar Ramdhani; Asep Hermawan
Jurnal Teknologika Vol. 15 No. 1 (2025): Jurnal Teknologika
Publisher : Sekolah Tinggi Teknologi Wastukancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51132/teknologika.v15i1.447

This research develops a dynamic system model to optimize inventory policies in multi-echelon supply chains within the sport footwear industry, addressing challenges from the bullwhip effect and supply chain disruptions. The sports footwear sector faces unique inventory management challenges due to complex demand patterns influenced by seasonality, fashion trends, and competitive dynamics. Our comprehensive system dynamics model captures the intricate relationships between four supply chain echelons: retailers, distributors, manufacturers, and raw material suppliers. The model integrates machine learning algorithms—specifically Long Short-Term Memory (LSTM) neural networks—for adaptive demand prediction and employs genetic algorithm optimization to determine optimal inventory parameters under various disruption scenarios. Using real-world data from a leading sports footwear manufacturer, we validated the model under normal operations and three distinct disruption scenarios: raw material shortages (45% reduction for 6 weeks), manufacturing capacity constraints (30% reduction for 8 weeks), and transportation disruptions (doubled lead times for 4 weeks). Results demonstrate that our proposed hybrid model reduces overall inventory costs by 18.7% compared to traditional policies while maintaining a 97.2% service level. The integration of machine learning for demand forecasting reduced prediction errors by 43.6% compared to conventional methods, directly mitigating the bullwhip effect by decreasing the order variability coefficient from 0.89 to 0.61 at the supplier level. Furthermore, the model enhanced supply chain resilience by reducing recovery time by 42% following major disruptions. This research contributes to the theoretical understanding of complex supply chain dynamics and practical applications for inventory management in volatile industries, offering a robust framework for decision-making under uncertainty.

Feasibility Study of Aluminum Ingot Manufacturing Plant Development Using Latest Technology with Aluminum Scrap Raw Material and 50,000 TPY Capacity in Cilegon Industrial Area Dedy Setyo Oetomo; Farliana Sutartiah; Akhsani Nur Amalia
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.v15i2.509

This study presents a comprehensive feasibility analysis for establishing an aluminum ingot manufacturing plant in Cilegon Industrial Area, Indonesia, with a production capacity of 50,000 tons per year (TPY) using aluminum scrap as primary raw material. The study encompasses demand assessment for the Indonesian market, supply chain analysis for both raw materials and finished products, evaluation of latest processing technologies, detailed capital expenditure (CAPEX) and operational expenditure (OPEX) calculations, and investment scheme analysis with 60% debt financing and 40% equity investment. The research methodology includes market analysis, technology assessment, financial modeling, and risk evaluation following aluminum smelting industry standards. Results indicate strong market demand with projected growth of 8.5% annually, adequate raw material supply from domestic and regional sources, and competitive advantages through modern reverberatory furnace technology with electromagnetic stirring systems. The total CAPEX is estimated at USD 45.2 million, with annual OPEX of USD 28.7 million. Financial analysis reveals positive net present value (NPV) of USD 12.8 million, internal rate of return (IRR) of 18.2%, and payback period of 6.8 years, confirming project viability. The study concludes that the proposed aluminum ingot plant demonstrates strong commercial and technical feasibility, with robust returns exceeding industry standards and strategic positioning in Indonesia's growing aluminum market

Kajian Integrasi Pembangkit Listrik Tenaga Biomassa Berbasis Limbah Bauksit sebagai Substitusi Energi Fosil pada Operasional PT “X” Alumina Refinery, Kalimantan Barat: Kajian Integrasi Pembangkit Listrik Tenaga Biomassa Berbasis Limbah Bauksit sebagai Substitusi Energi Fosil Dedy Setyo Oetomo; Rani Sri Wahyuni; Farliana Sutartiah
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.v16i1.672

The increasing energy consumption in alumina refinery industrial operations drives the need for diversification of more sustainable energy sources. PT “X” Alumina Refinery (PT.”X”) in West Kalimantan consumes large amounts of fossil energy for the Bayer process including digestion, evaporation, and calcination stages. This study examines the potential integration of biomass power plants based on bauxite residue (red mud and oversize bauxite) and local West Kalimantan biomass (palm shell, wood powder, and rice husk) as partial fossil energy substitutes through co-firing and gasification technologies. The study was conducted using a techno-economic analysis approach with mathematical models of energy balance, thermal efficiency, and life cycle cost analysis. Results show that total energy potential from bauxite residue and local biomass reaches 319,009 GJ/year (10.11 MW equivalent) within the operational radius, and 485,600 GJ/year (42.7 MW equivalent) at the provincial scale. Implementation of 30% biomass co-firing in existing boilers can reduce coal consumption by 89,250 tons/year and save net energy costs of IDR 87.3 billion per year. Environmental assessment shows CO? emission reductions of 198,450 tons/year (63.8% of baseline emissions). Economic feasibility analysis yields NPV = IDR 412.8 billion, IRR = 18.7%, and a payback period of 5.3 years, confirming the project's financial viability and contribution to Indonesia's 2060 Net Zero Emission target

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