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All Journal Media Teknik Sipil Journal of Social Science Devotion: Journal of Research and Community Service Journal of Social Research COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat TRANSPUBLIKA INTERNATIONAL RESEARCH IN EXACT SCIENCES (TIRES) INJURITY: Journal of Interdisciplinary Studies Jurnal Teknik Indonesia Journal of Social Science Enrichment: Journal of Multidisciplinary Research and Development Asian Journal of Social and Humanities
Laksono Djoko Nugroho
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Analysis of the Construction of Infiltration Wells in Pondok Jati Housing, Sidoarjo to Reduce Surface Flow for Flood Prevention Efforts Hasan Alif Fathurokman; Esti Wulandari; Laksono Djoko Nugroho
TRANSPUBLIKA INTERNATIONAL RESEARCH IN EXACT SCIENCES Vol. 4 No. 1 (2025): JANUARY
Publisher : Transpublika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55047/tires.v4i1.1561

Abstract

Water stored on the surface generally turns into runoff and much faster than groundwater considering the very low flow rate of the latter. Drainage of the Pondok Jati residential area is less able to receive or accommodate rainwater discharge because the development and growth of a city is one of the triggers for increasing the volume of discharge that passes through the residential area. Land use will affect the percentage of water that seeps into the soil with surface flow. Land with dense populations and many buildings, infiltration wells must be made more and larger in volume. Either with individual infiltration wells or with infiltration wells collectively for several houses, the need for infiltration wells from each block to reduce runoff that occurs with a 10-year return period plan. For the specifications of this infiltration well, concrete pipes are used. This infiltration well itself has concrete pipe walls with a diameter of 100 cm (1 meter) with the depth of the infiltration well is 300 cm (3.0 meters) and the number of points needed. The cost of making an infiltration well with a total of 210 infiltration wells in the Pondok Jati Sidoarjo housing complex is Rp. 696.358.600,- .
Optimization of Road Handling Priorities Using Provincial/District Roads Management System Integration and Analytical Hierarchy Process at UPT PJJ Surabaya, East Java Nur Aini Farida; Laksono Djoko Nugroho; Haris Muhammadun
TRANSPUBLIKA INTERNATIONAL RESEARCH IN EXACT SCIENCES Vol. 4 No. 1 (2025): JANUARY
Publisher : Transpublika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55047/tires.v4i1.1568

Abstract

This study aims to identify the priority order for road maintenance on road sections under the Surabaya Road and Bridge Management Unit (UPT PJJ Surabaya) in East Java Province by utilizing the Provincial/District Roads Management System (PKRMS) application integrated with the Analytical Hierarchy Process (AHP) method. Additionally, the study seeks to estimate the required costs for implementing the road maintenance. The research adopts a quantitative approach with a positivist philosophy. The study population consists of 123 employees from the East Java Provincial Public Works and Highways Agency, with a sample of 33 respondents selected using purposive sampling techniques. Data were collected using a mixed-method approach, involving road condition surveys conducted through the Moving Car Observer (MCO) method and a literature review. Data analysis was conducted systematically using a combination of PKRMS and AHP. The results indicate that the top-priority road section for maintenance, based on the integration of PKRMS and AHP, is the Sumberwudi–Karang Geneng section, which obtained the highest Priority Index Score (TPI) of 56. The estimated cost required for maintaining this road section is Rp16,475,545,104.98. The integration of PKRMS and AHP provides an objective, efficient, and data-driven approach, enabling local governments to optimize budgets and extend the lifespan of road infrastructure. This study recommends that local governments consistently adopt the combination of PKRMS and AHP in road infrastructure management to ensure more targeted budget allocation and enhance transparency in decision-making processes.
Analysis of Road Infrastructure Condition Based on Traffic Density in Bengkulu City Sugeng Pujiyono; Laksono Djoko Nugroho; Haris Muhammadun
TRANSPUBLIKA INTERNATIONAL RESEARCH IN EXACT SCIENCES Vol. 4 No. 1 (2025): JANUARY
Publisher : Transpublika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55047/tires.v4i1.1590

Abstract

The purpose of this research is to explain the analysis of road infrastructure conditions, in terms of traffic density and road quality in Bengkulu City. The research method uses descriptive with qualitative approach, Research Subjects, are people and government institutions, key informants are all people or officials related to road infrastructure policy makers, traffic density and road quality, such as traffic police, transportation department, PUPR department, BPS Bengkulu City. Informants are people or government institutions/institutions that are the object of research, the number is determined based on the criteria of this research. in the form of structured questions for interviews to Informants, Key informants and Triangulation of data. Data Collection Techniques present the sampling methods and data collection techniques used, such as field surveys, direct observation, or the use of secondary data. The results of the analysis using Neil S. Grigg's Infrastructure Management theory state that the condition of Road Infrastructure in Bengkulu City is good based on the criteria of the transport system (roads and bridges), clean water and sanitation systems and energy and other public facilities.
Analysis of Work Network and Critical Trajectory on Penganten - Ngampal Road Reconstruction Project Using Critical Path Method (CPM) Akmal Puguh Al-Putro; Laksono Djoko Nugroho; Haris Muhammadun
TRANSPUBLIKA INTERNATIONAL RESEARCH IN EXACT SCIENCES Vol. 4 No. 1 (2025): JANUARY
Publisher : Transpublika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55047/tires.v4i1.1599

Abstract

The Reconstruction Project of Penganten-Ngampal Road in Bojonegoro Regency faces challenges in time and resource management, leading to project delays. These delays affect time and cost efficiency, which are key issues in achieving the project's objectives. To address this problem, this study aims to analyze the project’s work schedule and critical path using the Critical Path Method (CPM). The research employs a quantitative method, with data collected through primary and secondary data sources. Primary data was obtained through field observations and questionnaires, while secondary data was gathered from project documents and relevant literature. Using CPM, the first step was to construct the project’s work schedule based on the work breakdown structure (WBS) and the relationships between activities. An analysis was then performed utilizing forward pass and backward pass methods to identify the critical path. This path comprises tasks that require timely completion to avoid causing additional project delays. The results show that the critical path for the Penganten-Ngampal Road Reconstruction Project is identified in activities with codes A, C, D, E, and F. The total project completion duration based on the analysis is 47 days. Activities on this critical path must be completed on time, as delays in any of these activities will affect the overall completion of the project. Therefore, better time management and proper resource allocation for critical activities are essential to complete the project according to the planned timeline.
Analysis of Factors Affecting Clean Water Service in Dili City Orlando Gomes; Esti Wulandari; Laksono Djoko Nugroho
TRANSPUBLIKA INTERNATIONAL RESEARCH IN EXACT SCIENCES Vol. 4 No. 2 (2025): APRIL
Publisher : Transpublika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55047/tires.v4i2.1603

Abstract

Availability of clean water is a basic need in Dili City, Timor Leste, but uneven distribution, inadequate infrastructure, and limited resources are the main challenges. This study aims to analyze the factors that influence clean water services. The research method included multiple linear regression analysis to identify influential factors. Data was obtained through surveys, interviews, official reports and literature review. The results showed that piping distance and number of family members positively influenced water quality and quantity, while household income tended to decrease water quality and quantity. Expenditure on clean water improves water quality and quantity. For water continuity, the number of people in the family had a strong positive effect, while other factors had a negative effect. The coefficient of determination for water quality is 5.3%, water quantity 20.9%, and water continuity 5.9%, indicating that many other factors influence water services in Dili City.
EVALUATION OF PROJECT COST AND TIME USING EARNED VALUE APPROACH: A CASE OF MILITARY INFRASTRUCTURE PROJECT Nazaruddin Nazaruddin; Laksono Djoko Nugroho; Haris Muhammadun
Interdiciplinary Journal and Hummanity (INJURITY) Vol. 4 No. 1 (2025): INJURITY: Journal of Interdisciplinary Studies.
Publisher : Pusat Publikasi Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58631/injurity.v4i1.1390

Abstract

This research aims to optimize the performance of construction projects at Yohanis Kapiyau Airbase so that the work can be completed on time, meet quality standards, and in accordance with the predetermined budget. This research addresses key questions regarding the evaluation of project cost and time control, specifically examining project cost performance through Cost Variance and Cost Performance Index (CPI) indicators, as well as project time performance using Schedule Variance (SV) and Schedule Performance Indices (SPI) indicators. The implementation of the Earned Value Management (EVM) method has proven its effectiveness as an analytical instrument that integrates cost and cost dimensions comprehensively. Through the comprehensive analysis that has been conducted, the method successfully identified with precision that the fundamental challenge of the project lies in the aspect of time management, while cost management shows excellent efficiency. It can be concluded that the achievement of excellent cost efficiency has a positive impact on the overall project performance. Based on the results of the comprehensive evaluation, several strategic recommendations can be formulated for the optimization of project implementation in the future.
PROJECT COST ANALYSIS THROUGH EARNED VALUE METHOD ON THE INSTALLATION OF BAGGAGE HANDLING SYSTEM (BHS) PPUPG (PROJECT CASE STUDY AT SULTAN HASANUDIN INTERNATIONAL AIRPORT MAKASSAR) Irwansyah Digma Pratama; Laksono Djoko Nugroho; Haris Muhammadun
Interdiciplinary Journal and Hummanity (INJURITY) Vol. 4 No. 1 (2025): INJURITY: Journal of Interdisciplinary Studies.
Publisher : Pusat Publikasi Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58631/injurity.v4i1.1391

Abstract

This research is aimed at analyzing the cost performance of the Ppupg Baggage Handling System (BHS) Installation project at Sultan Hasanudin Makassar International Airport. This research focuses on two key questions: (1) how to assess cost performance during monitoring using indicators such as Cost Variance and Cost Performance Index, and (2) what the estimated total project cost will be upon completion, specifically through the Estimated All Completion (EAC). The research is conducted from October Week 2 to the field in January 2025 which began in stages from research preparation, initial survey, literature review, data collection, proposal preparation, data analysis, and thesis preparation. The research was conducted in the form of observations, namely, the PPUPG baggage handling system installation project. The study was conducted using a multidisciplinary approach. The analysis of the EAC serves to enhance understanding of projected total project costs, allowing for better financial forecasting and budget management. The findings from this study can help practitioners optimize budgeting processes and improve project outcomes, thereby advancing the overall understanding of cost management in infrastructure projects. Future research can contribute to more effective cost management strategies and improved project performance outcomes by integrating findings from both CPM analysis and comprehensive literature.
Analisis Banjir Rancangan Metode HSS Laksono-Erub Laksono Djoko Nugroho; Esti Wulandari; Ony Frengky Rumihin; Tisno Subroto
COMSERVA : Jurnal Penelitian dan Pengabdian Masyarakat Vol. 5 No. 9 (2026): COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/comserva.v5i9.3512

Abstract

Prediksi banjir rancangan yang akurat merupakan kebutuhan mendasar dalam perencanaan infrastruktur pengendalian banjir dan manajemen sumber daya air. Penelitian ini bertujuan untuk membandingkan akurasi empat metode Hidrograf Satuan Sintetik (HSS) dalam memprediksi debit banjir rancangan di DAS Plumbon, Kabupaten Semarang, yakni metode HSS Nakayasu, Snyder, Gama I, dan Laksono-Erub, serta mengidentifikasi metode yang memberikan penyimpangan terkecil terhadap data debit observasi. Penelitian ini menggunakan pendekatan kuantitatif komparatif dengan data curah hujan harian maksimum tahunan periode 2010-2020 dari tiga stasiun hujan di sekitar DAS Plumbon (Stasiun Mangkang, Kaligawe, dan Gunungpati), serta data debit observasi dari Bendung Plumbon periode yang sama. Hasil penelitian menunjukkan bahwa metode HSS Laksono-Erub memberikan akurasi tertinggi dengan nilai RMSE = 8,45 m³/detik, MAPE = 12,3%, dan R² = 0,89, diikuti oleh metode Gama I (RMSE = 11,72 m³/detik, MAPE = 16,8%, R² = 0,82), Nakayasu (RMSE = 15,31 m³/detik, MAPE = 21,5%, R² = 0,74), dan Snyder (RMSE = 18,96 m³/detik, MAPE = 25,7%, R² = 0,68). Metode Laksono-Erub secara konsisten menunjukkan penyimpangan terkecil untuk semua kala ulang, dengan selisih rata-rata 10-15% terhadap debit observasi. Temuan ini mengonfirmasi bahwa metode Laksono-Erub, yang dikalibrasi berdasarkan karakteristik DAS di Jawa Utara dan Madura, memiliki aplikabilitas yang baik untuk DAS Plumbon yang memiliki karakteristik fisiografis serupa. Penelitian ini memberikan rekomendasi praktis bagi perencana dalam memilih metode HSS yang tepat untuk analisis banjir rancangan di wilayah dengan karakteristik DAS serupa, serta memperkuat basis validasi empiris metode Laksono-Erub di luar lokasi pengembangan aslinya.
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.
Analysis of Time Acceleration in The Malaka Regent's Office Construction Project Using The Critical Path Method (CPM) and Time-Cost Trade-Off (TCTO) Thomas Aquino Seki; Laksono Djoko Nugroho; Esti Wulandari
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.v5i3.922

Abstract

The construction of the Malaka Regency Regent's Office has encountered significant challenges, including recurring project delays caused by factors such as design changes, unpredictable weather conditions, labor shortages, and insufficient materials or equipment. These issues have resulted in inefficiencies in project scheduling and cost management, highlighting the need for effective project management strategies. This study aims to analyze the project schedule, identify the critical path, and evaluate schedule acceleration alternatives for the Malaka Regent's Office construction project using the Critical Path Method (CPM) and the Time–Cost Trade-Off (TCTO) method. The study applied the Critical Path Method (CPM) and the Time–Cost Trade-Off (TCTO) method to analyze the project schedule, identify critical activities, and evaluate feasible acceleration strategies. The analysis showed that the originally planned project duration of 224 calendar days could be reduced to 196 calendar days using the CPM approach, while the TCTO method further shortened the project duration to 182 calendar days. This acceleration was achieved by minimizing idle time between critical activities, optimizing resource allocation, and implementing time–cost trade-off strategies without compromising the project's quality or scope. The findings demonstrate the effectiveness of CPM and TCTO in optimizing construction schedules and reducing project delays. Furthermore, this study provides a practical framework for improving schedule and cost performance in construction projects, particularly those involving public infrastructure development.
Co-Authors Akmal Puguh Al-Putro Bela Prayogo Digma Pratama, Irwansyah Esti Wulandari Esti Wulandari Fakhrurrozi, Muhamad Haris Muhammadun Haris Muhammadun Haris Muhammadun Hasan Alif Fathurokman Irwansyah Digma Pratama Moh Abduh . Muhammad Zainal Muttaqin Muhammad Zainal Muttaqin Muhammadun, Haris N. Nazaruddin Nashrullah Arifin, Isyraq Nazaruddin Nazaruddin Nur Aini Farida Oetomo, Wateno Ony Frengky Rumihin Orlando Gomes Sugeng Pujiyono Thomas Aquino Seki Tisno Subroto