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INDONESIA
Jurnal Teknik Indonesia
Published by Publica Scientific Solution
ISSN : 29648092     EISSN : 29632293     DOI : https://doi.org/10.58860/jti
Core Subject : Engineering,
Electrical & Electronics Engineering Engineering Transportation
Indonesian Technical Journal is a scientific journal in the form of research and can be accessed openly. This journal is published quarterly by Publica Scientific Solution. Indonesian Technical Journal provides a means for ongoing discussion of relevant issues that fall within the focus and scope of the journal that can be examined empirically. This journal publishes research articles that cover all aspects of Engineering science.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 102 Documents
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Analysis of Performance and Level of Service of the Yos Sudarso Road Section in Baubau City Based on the Pedoman Kapasitas Jalan Indonesia (PKJI) 2023 Jamiludin Nasir; Budi Witjaksana; Jaka Purnama
Jurnal Teknik Indonesia Vol. 5 No. 2 (2026): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v5i2.816

Abstract

The Yos Sudarso Road section in Wolio District, Baubau City, is a major road with a strategic function, serving as the main connector between important centers such as the commercial area, Kamali Beach, and Murhum Port. The diverse land-use functions along this road generate high daily activity variations, which directly impact its traffic performance. Currently, Jalan Yos Sudarso is experiencing a decline in performance due to increased traffic volume and significant side friction from commercial activities. This research aims to analyze the traffic flow conditions and the Level of Service (LOS) of the road. The analysis method utilizes the Pedoman Kapasitas Jalan Indonesia (PKJI) 2023, based on primary data from surveys on road geometry, traffic volume, and side friction during peak hours. The traffic flow conditions reveal a very high level of side friction caused by on-street parking and vehicle maneuvers into/out of commercial establishments. This activity effectively reduces the road's effective width, consequently degrading its performance. During the peak hour (09:00–10:00), the number of side friction incidents reached 327 incidents per hour, with a concurrent traffic volume of 918.5 pcu/hour (passenger car units per hour). The analysis results show that the road section's actual capacity is 1,116.9 pcu/hour with a Degree of Saturation (DS) value of 0.82. This indicates congested flow conditions and a Level of Service (LOS) category D. This condition suggests that the road can still function, but it no longer provides an optimal level of service.
Analysis Cost Implementation Using Erection Method in Bridge Construction Malo District – Bojonegoro David Himawan Susetya; Esti Wulandari; Andi Patriadi
Jurnal Teknik Indonesia Vol. 5 No. 2 (2026): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v5i2.798

Abstract

The construction of the Malo Bridge in Bojonegoro Regency encountered significant challenges during the superstructure erection phase, primarily due to limited site accessibility and the use of a less suitable erection method. This study aims to evaluate the comparative efficiency of two primary erection techniques: the use of a 250-ton crawler crane operated from land and a combined method involving a 100-ton crawler crane supported by modular pontoons operating from the water. A case study approach with a quantitative methodology was applied, focusing on three main parameters: erection duration, construction cost, and risk management. The analysis indicates that the land-based 250-ton crawler crane method required a shorter erection period of 181 days, compared to 203 days for the modular pontoon method, resulting in a time-efficiency gain of 10.84%. Furthermore, the 250-ton crawler crane method demonstrated greater cost-effectiveness and a lower level of operational risk. These findings highlight that selecting an erection method that aligns with the site’s geographical and logistical conditions is crucial for optimizing construction performance. Appropriate method selection can lead to significant improvements in both time and cost efficiency, especially in complex or constrained environments.
Analysis of Drainage Channel Construction Work Time Using the Trade Cost Trade Off (TCTO) Acceleration Method in Ponorogo Regency Bela Prayogo; Laksono Djoko Nugroho; Esti Wulandari
Jurnal Teknik Indonesia Vol. 5 No. 2 (2026): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v5i2.799

Abstract

Drainage infrastructure development plays a crucial role in supporting urban environmental quality and preventing waterlogging and flooding. However, construction projects often experience delays that hinder infrastructure performance. In the drainage channel construction project on Letjend Suprapto Street and Menur Street, Ponorogo Regency, a progress deviation of ?30.26% occurred in the eighth week, indicating the need for an effective acceleration strategy. This study aims to analyze the effect of applying the Trade-Off Cost–Time (TCTO) method on project time acceleration and cost changes. This research employed a quantitative approach using network planning analysis with Microsoft Project to identify the critical path, followed by crashing analysis through additional work shifts and cost slope calculations using the TCTO method. The findings indicate that the project duration can be reduced from 65 days to 60 days by implementing a two-shift work system. This acceleration resulted in an increase in direct costs from IDR 2,390,347,251.56 to IDR 2,411,296,170.48. The TCTO method is proven effective in accelerating project duration with manageable additional costs, making it a viable solution for overcoming delays in drainage construction projects.
Enhanced Artificial Neural Network Model with Feature Importance Analysis for Drainage Infrastructure Cost Prediction in Data-Scarce Regions Rahmat Rahmat; Andi Patriadi; Esti Wulandari
Jurnal Teknik Indonesia Vol. 5 No. 2 (2026): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v5i2.815

Abstract

Accurate cost estimation of drainage infrastructure is a critical challenge in rapidly urbanizing regions, particularly in areas with limited historical project data. In Indonesia, inadequate estimation methods often lead to cost overruns and inefficient budget allocation, highlighting the need for more reliable predictive approaches. This study aims to develop and validate an Artificial Neural Network (ANN) for predicting drainage construction costs in data-scarce environments. A quantitative research design was employed using data from 10 drainage projects in South Buton Regency, which were expanded to 150 samples through rule-based data augmentation. The ANN model, based on a Multilayer Perceptron (MLP) architecture, was trained and validated using 5-fold cross-validation. Its performance was evaluated using R², MAE, RMSE, and MAPE, and compared with Multiple Linear Regression (MLR), Random Forest (RF), and Support Vector Regression (SVR) models. The results demonstrate that the proposed ANN model achieves superior predictive performance, with an R² of 0.9978 and MAPE of 3.04%, significantly outperforming the benchmark models. Feature importance analysis reveals that material-related costs, particularly stone masonry, are the most influential factors in determining total project cost. The model also shows strong generalizability and robustness across datasets. The findings imply that the integration of ANN, data augmentation, and feature importance analysis provides a practical and scalable solution for cost estimation in resource-constrained regions. This research contributes to improving decision-making in infrastructure planning, enhancing budget accuracy, and supporting more efficient and sustainable public investment strategies.
Analysis of the Water Balance of the Prumpung River Area (DAS) in Tuban Regency Using the Thornthwaite-Mather Method Rony Zakariya; Andi Patriadi; Esti Wulandari
Jurnal Teknik Indonesia Vol. 5 No. 2 (2026): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v5i2.817

Abstract

Water is a vital resource whose availability is increasingly uneven due to climate variability, land-use changes, and rising water demand. This condition leads to water surplus during the rainy season and deficit during the dry season, including in the Prumpung Watershed, Tuban Regency. This study aims to analyze the monthly and annual water balance and evaluate the relationship between water availability and water demand in the study area. A descriptive quantitative approach was employed using the Thornthwaite–Mather method, based on rainfall and air temperature data from 2015 to 2024, combined with domestic and non-domestic water demand data for 2024. The results indicate that potential evapotranspiration fluctuates in accordance with air temperature, while actual evapotranspiration is influenced by groundwater availability. Groundwater storage increases during the rainy season and decreases during the dry season. The annual water balance reveals a dominance of deficit conditions in most observation years, although surplus occurs during certain periods. The Prumpung Watershed is vulnerable to water deficits due to uneven rainfall distribution. Sustainable water resource management strategies, focusing on conservation, are required to maintain a long-term hydrological balance.
Economic Sensitivity Analysis of Waste Heat Recovery System in PME Biodiesel-Fueled Industrial Diesel Generators Erwin Budi Sulistyo
Jurnal Teknik Indonesia Vol. 5 No. 3 (2026): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v5i3.888

Abstract

This study analyzes the economic sensitivity of an exhaust gas waste heat utilization system in a PME biodiesel-fueled industrial diesel generator to replace electrical heating energy in the biodiesel preheater system. Investment feasibility was evaluated using Net Present Value (NPV), Internal Rate of Return (IRR), and Payback Period (PBP) under variations in electricity tariffs, annual operating hours, capital expenditure (CAPEX), and discount rates. The baseline analysis indicates strong financial feasibility, yielding an NPV of IDR 2,229,466,230, an IRR of 93.7%, and a payback period of 1.07 years. Sensitivity analysis shows that the electricity tariff is the most dominant parameter affecting investment viability. Based on a linear interpolation approach, the investment reaches its break-even point at an electricity tariff of approximately IDR 435/kWh. Overall, the system demonstrates robust economic resilience and strong potential for energy conservation and industrial decarbonization under the framework of Economic Sensitivity Analysis of Waste Heat Recovery System in PME Biodiesel-Fueled Industrial Diesel Generators.
Deteksi Anomali Temporal dan Aktivitas Terkoordinasi pada Komentar Produk Parfum Menggunakan Long Short-Term Memory (LSTM) Agus Irvan Maulana; Tacbir Hendro Pudjiantoro; Dea Destiani
Jurnal Teknik Indonesia Vol. 5 No. 3 (2026): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v5i3.889

Abstract

Perkembangan media sosial menyebabkan peningkatan interaksi pengguna dalam bentuk komentar pada unggahan produk. Namun, tingginya aktivitas komentar juga berpotensi memunculkan aktivitas tidak autentik dan komentar terkoordinasi yang dapat memengaruhi persepsi pengguna terhadap suatu produk. Penelitian ini bertujuan untuk mendeteksi anomali temporal dan mengidentifikasi indikasi aktivitas komentar terkoordinasi pada unggahan produk parfum di Instagram. Objek penelitian dipilih karena unggahan produk parfum memiliki tingkat interaksi yang tinggi sehingga berpotensi menimbulkan lonjakan aktivitas komentar pada waktu tertentu. Dataset yang digunakan terdiri dari 448 komentar yang dikumpulkan melalui proses scraping Instagram pada periode 19 Januari 2026 hingga 3 Mei 2026. Data kemudian diproses melalui tahapan preprocessing, transformasi time-series, serta representasi teks menggunakan model IndoBERT. Metode Long Short-Term Memory (LSTM) digunakan untuk mempelajari pola temporal komentar dan mendeteksi anomali berdasarkan nilai residual dan threshold anomaly, sedangkan Cosine Similarity digunakan untuk mengukur tingkat kemiripan antar komentar pada waktu anomali. Hasil evaluasi model menunjukkan nilai MAE sebesar 0,3318, RMSE sebesar 1,9483, dan MAPE sebesar 16,37%, yang menunjukkan kemampuan prediksi model berada pada kategori baik. Proses deteksi anomali berhasil menemukan empat waktu anomali dengan lonjakan komentar yang signifikan. Analisis cosine similarity menunjukkan adanya kelompok komentar dengan tingkat kemiripan teks yang tinggi, termasuk komentar identik dan pengulangan kata tertentu secara berulang. Penelitian ini memberikan kontribusi pada bidang social media analytics dan anomaly detection melalui integrasi analisis temporal dan analisis kemiripan teks untuk mengidentifikasi pola aktivitas komentar yang tidak normal serta indikasi aktivitas komentar terkoordinasi pada media sosial.
Evaluation of Traffic Performance on the Ciledug–Pabuaran Road Section on Cirebon Regency Fauzan Adzim; Martinus Agus Sugiyanto
Jurnal Teknik Indonesia Vol. 5 No. 3 (2026): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v5i3.891

Abstract

The growth of industrial areas in East Cirebon Regency has increased transportation activities and traffic volume on the Ciledug–Pabuaran Road, potentially reducing traffic performance. This study aims to evaluate traffic performance on the Ciledug–Pabuaran Road segment and analyze the impact of industrial development on traffic conditions. The research employed a quantitative approach using field surveys and descriptive analysis. Primary data were collected through traffic volume surveys, vehicle speed measurements, and roadside friction observations, while secondary data were obtained from relevant agencies and the Indonesian Highway Capacity Guidelines (PKJI). The analysis included calculations of traffic volume, road capacity, volume-to-capacity ratio (V/C Ratio), and Level of Service (LOS). The results indicate that the average traffic volume reached approximately 16,000 vehicles per day, while the effective road capacity was 1,078 vehicles per hour. The V/C ratio of 1.05 indicates that the road segment operates beyond its capacity (overcapacity). High roadside friction caused by industrial activities contributed to a decline in the Level of Service to categories D–E during peak hours. The study concludes that industrial area development has a significant impact on increasing traffic congestion and reducing road performance. Therefore, mitigation measures such as the implementation of Traffic Impact Analysis (ANDALALIN), industrial access management, and road capacity improvements are necessary to support traffic flow efficiency and road safety.
Implementation of the Rapid Application Development Method in the Development of a Web-Based Information System for Monitoring Defective Replacement Parts at PT Bonecom Tricom Paintech Rizki Fahrizal; Sophian Andhika Sardi; Antika Zahrotul Kamalia
Jurnal Teknik Indonesia Vol. 5 No. 3 (2026): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v5i3.898

Abstract

Developments in information technology have encouraged companies to improve the effectiveness and accuracy of operational data management. PT Bonecom Tricom Paintech still records Not Good (NG) part monitoring manually, which increases the likelihood of recording errors, delays in reporting, and the possibility of data loss. This study aims to design and implement a web-based information system for NG part monitoring using the Implementation of the Rapid Application Development Method in the Development of a Web-Based Information System for Monitoring Defective Replacement Parts at PT Bonecom Tricom Paintech method. The RAD method was chosen because it focuses on rapid system development through an iterative approach, prototyping, and active user participation at every stage of development. The research process includes needs analysis, system design using Unified Modeling Language (UML), application development, and system functional testing. The results indicate that the developed system is able to improve the efficiency of the recording process, reduce errors caused by human factors, and provide NG part monitoring information that is more accurate and integrated. With this system, the Quality Assurance Department can conduct supervision and decision-making more quickly and precisely.
Analisis Penggunaan Metode Critical Path Method (CPM) Terhadap Penjadwalan Proyek Pembangunan Laboratorium Emerging Disease di Kalimantan Aminullah Aminullah; Ginanjar Priadikusumah; Septia Anggraaini
Jurnal Teknik Indonesia Vol. 5 No. 3 (2026): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v5i3.901

Abstract

Manajemen waktu merupakan elemen esensial dalam proyek konstruksi, karena keterlambatan penyelesaian dapat menyebabkan pembengkakan biaya dan potensi kegagalan proyek. Penjadwalan proyek yang baik membantu dalam menetapkan urutan kerja yang optimal, memperkirakan durasi setiap aktivitas dan mengidentifikasi jalur kritis yang tidak boleh terlambat agar keseluruhan proyek dapat diselesaikan tepat waktu. Dalam konteks ini, metode Critical Path Method (CPM) sering digunakan untuk meningkatkan efisiensi penjadwalan. CPM berfokus pada identifikasi jalur kritis untuk menentukan durasi minimum proyek. Setelah dilakukan analisis jalur kritis (Critical Path) menggunakan metode Critical Path Method (CPM) maka diperoleh hasil berupa diagram jaringan kerja (network diagram) dan diagram jalur kritis (critical path). menunjukkan urutan aktivitas yang menentukan durasi total proyek. Dalam penggunaan Microsoft Project, jalur kritis dapat ditampilkan dalam tampilan Gantt Chart. Yang dimana jalur kritis ditampilkan dengan warna merah. Dalam penerapan metode CPM ini, dapat membantu manajer proyek dalam menampilkan hubungan antar pekerjaan yang satu dengan pekerjaan yang lainnya dari keseluruhan jadwal pelaksanaan proyek tersebut dan juga dapat mengidentifikasi pekerjaan atau aktivitas yang termasuk dalam lintasan kritis Setelah dilakukan analisis Critical Path Method (CPM) menggunakan aplikasi Microsoft Project 2021, terdapat hasil jalur lintasan kritis (critical path) yang diperoleh yaitu ada 5 kegiatan atau aktivitas pekerjaan Dalam penerapan metode CPM ini, dapat membantu manajer proyek dalam menampilkan hubungan antar pekerjaan yang satu dengan pekerjaan yang lainnya dari keseluruhan jadwal pelaksanaan proyek tersebut dan juga dapat mengidentifikasi pekerjaan atau aktivitas yang termasuk dalam lintasan kritis.

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