Jurnal Online Universitas Pahlawan Tuanku Tambusai
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Penentuan Lokasi Stasiun Pengisian Kendaraan Listrik Umum (SPKLU) di Kota Mojokerto Menggunakan Metode Mixed-Integer Linear Programming (MILP)
Full text linkThis study aims to determine the optimal location of Electric Vehicle Public Charging Stations (SPKLU) in Mojokerto City using the Mixed-Integer Linear Programming (MILP) method. The research is motivated by the increasing number of electric vehicles in Mojokerto, which is not yet supported by adequate charging infrastructure. The data used include the distribution of EV users, potential charging station locations, distance matrices, service capacity, and construction cost estimates. The MILP model is formulated to minimize the total construction and operational costs while maximizing service coverage. The results identify three strategic optimal locations based on proximity to demand clusters and cost efficiency. The findings provide practical recommendations for local governments and PLN to develop sustainable EV charging infrastructure in Mojokerto City
Analisis Pengukuran Beban Kerja dan Mental Pekerja Produksi Menggunakan Metode Cardiovascular Load (CVL) dan NASA-TLX
Full text linkThis stuidy analyzeid thei physical and meintal workload of produiction workeirs at CV. Man Jaya uising thei Cardiovascuilar Load (CVL) and NASA-TLX meithods. Initial meiasuireimeint reisuilts showeid a physical workload in thei heiavy cateigory, with a %CVL valuiei in thei raw mateirial cuitting seiction of 63% and asseimbly of 61.2%. Afteir improveimeints throuigh work activity arrangeimeint and thei uisei of assistivei deiviceis, thei %CVL valuiei deicreiaseid to 48% and 51.4% (modeiratei cateigory). For meintal workload, raw mateirial cuitting and finishing workeirs had WWL valuieis of 92 and 91 (veiry high cateigory). Afteir impleimeinting improveimeints in thei form of improveid work commuinication, cleiareir division of tasks, and improveid lighting, thei WWL valuieis deicreiaseid to 76 and 73 (high cateigory). Thei reisuilts of this stuidy can bei a reifeireincei for companieis to improvei work systeims, increiasei Occuipational Safeity and Heialth (K3), and workforcei produictivity
Model Optimasi Distribusi Minimum Biaya Berbasis Transportation Problem dan Shortest Path
Full text linkThis study develops a minimum-cost distribution optimization model by integrating the Transportation Problem for shipment allocation and the Shortest Path method for minimum-distance routing. Distance, cost per kilometer, demand, and vehicle capacity are quantitatively analyzed using mathematical modeling and then compared with the company’s manual distribution pattern. The results show that total travel distance decreases from 110 km to 80 km and distribution cost drops from IDR 880,000 to IDR 640,000 per trip. The estimated delivery lead time (average speed 40 km/h) is reduced from 2.75 hours to 2.00 hours. A cost sensitivity test (IDR 7,000–10,000 per km) indicates a consistent efficiency of 27.27%, suggesting model robustness to cost fluctuations. This model can support data-driven distribution decisions to improve cost efficiency and operational performance
Pembuatan Arang Aktif dari Pelepah Sawit Menggunakan Aktivator H2SO4 sebagai Adsorben untuk Pemurnian Air Sungai Siak
Full text linkOil palm fronds are an agricultural waste with potential application as a raw material for activated carbon due to their lignocellulosic content, which includes cellulose, hemicellulose, and lignin, enabling their function as an adsorbent. In this study, oil palm fronds were carbonized by pyrolysis at a temperature of 350°C, size-reduced to 100 mesh, and subsequently activated using a 0.1 M H₂SO₄ solution for 3 hours, then drying by oven at 70°C. 100 mL of the Siak River sample was added with 3 grams of activated carbon for the adsorption process, then shaken every 20 minutes for 3 hours. Turbidity analysis was conducted using a turbidimeter. The results indicated that the lowest turbidity values were obtained in the morning, namely 16.8 NTU at the upper section and 21.7 NTU at the lower section. This is attributed to the minimal level of community activities around the Siak River during the morning period.
Evaluasi Kondisi Eksisting Program Desa/Kelurahan Berseri dan Perumusan Rekomendasi Peningkatan Kategori di Desa Betiting, Kabupaten Gresik
Full text linkThis study examines how the Desa/Kelurahan Berseri Program, regulated by East Java Governor Regulation No. 56 of 2023, is implemented in Betiting Village, Gresik. The purpose of this study is to evaluate the existing conditions and develop a strategy for upgrading the category from Pratama to Madya using gap identification and SWOT analysis. Using a descriptive-evaluative approach and official 2025 assessment data, the results show that although the Pratama status has been achieved with a sufficient foundation, as an effort to upgrade the category from Pratama to Madya, the study suggests methods such as intensive household assistance, program replication, and optimization of communal wastewater treatment plants
Analisis Tingkat Kesesuaian Tempat Penyimpanan Sementara (TPS) Limbah Bahan Berbahaya dan Beracun (B3) di PT. X
Full text linkThe handling of Hazardous and Toxic (B3) waste needs a storage system that satisfies technical criteria in an effort to reduce environmental damage and health hazards. This study aims to evaluate the level of compliance of the Temporary Sotrage Area (TPS) for B3 waste at PT. X with the applicable technical requirements. The research was conducted through field observations, measurement of technical parameters, and examination of licensing documents and B3 waste management records. The results indicate that the compliance level of the B3 waste TPS reached 95.88%, and falls into the highest performance category. Several issues were still identified, particularly in the aspects of B3 waste accumulation and the provision of symbols and labels. Therefore, this study recommends the implementation of periodic internal audits and improved compliance with B3 waste packaging and labeling standards
Optimisasi Desain Rangka Bentor dengan Fokus pada Aspek Keselamatan Menggunakan Metode Pahl and Beitz
Full text linkThis study proposes a safer bentor frame design using a Research and Development (R&D) approach combined with the Pahl & Beitz design methodology. User requirements were gathered through field observations and questionnaires, revealing major safety issues in current bentor structures, including braking performance, suspension reliability, and dimensional inconsistency. A revised configuration was developed featuring a rear passenger layout, AISI 1020 frame material, front disc brake, telescopic suspension, and a differential drivetrain system. Structural performance was verified through static load simulation using Finite Element Analysis (FEA) based on real operating conditions. The results indicate a maximum stress of 140 MPa, displacement of 0.49 mm, and a safety factor of 2.49, remaining within the allowable limit of the material’s 351 MPa yield strength. These findings demonstrate that the proposed design offers improved structural integrity, stability, and operational safety, making it a viable alternative for practical implementation
Implementasi Value Stream Mapping (VSM) untuk Mengurangi Waste dalam Produksi Precast di CV. ABC
Full text linkCV. Abc is a company that produces precast concrete. By using the Value Stream Mapping (VSM) method, which is a visualization method used in Lean Manufacturing to identify, analyze and improve the flow of material and information in a production process. This research aims to evaluate how wasteful precast concrete products are. CV. Abc works in the field of infrastructure development, especially irrigation and making products such as U-dith, Box Culvert, and Cover. The results of the research were carried out by dividing 7 waste into 7 types of waste based on the level of importance and performance. This research found that there is waste that needs to be corrected, especially related to visual defects on the product surface. Recommendations for improvement include better waste control, better finishing processes, and more efficient production processes. It is hoped that the implementation of these measures will increase customer satisfaction and increase the company's competitiveness in the construction market
Integrated Investment Feasibility and Operational Efficiency Assessment for Small Cultural-Fashion Enterprises in the Digital Era
Full text linkThis study evaluates the investment feasibility and business development strategy of a custom and rental kebaya enterprise in Sidoarjo. A quantitative approach was employed by calculating Net Present Value, Internal Rate of Return, and Payback Period based on actual cash flows. The results show an NPV of Rp 91.6 million, an IRR of 26.9 percent, and a payback period of 1.5 years, confirming that the enterprise is financially feasible. Operational assessment indicates a production time of 3.8 days per unit, a rework rate of 4.5 percent, a monthly output of 25 units, and a labor cost of Rp 250,000 per unit, all of which demonstrate efficient performance. These findings support the formulation of development strategies involving digital promotion, cost control, and service diversification. The study offers a practical investment-decision framework for cultural-fashion SMEs and strengthens efficiency-based creative-industry management.
Analisis Pemilihan Supplier dengan Menggunakan Metode Analitical Hierarchy Process Unit Repair Management & Partnership pada PT. ABC
Full text linkSelecting the right supplier is crucial to ensure project quality and smooth operations. This study aims to determine the best supplier for the Remaining Life Analyst Turbine GE Frame 5 Project at PT. ABC by applying the Analytical Hierarchy Process (AHP) method. The assessment criteria used include Price, Quality, Delivery Time, and Payment Terms, which were then compared for three candidate suppliers: PT.123, PT.456, and Yayasan 789. Based on the AHP analysis results, the Payment criterion was identified as the most influential factor. From the global priority calculations, PT.456 emerged as superior and was determined as the selected supplier. These results demonstrate that the AHP method is effective as a decision-support tool for complex decisions, providing an objective and structured recommendation for selecting the company's strategic partners