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All Journal Jurnal Teknik Sipil JHP17 (Jurnal Hasil Penelitian) The Spirit of Society Journal : International Journal of Society Development and Engagement EXTRAPOLASI: Jurnal Teknik Sipil Jurnal Review Pendidikan dan Pengajaran (JRPP) Community Development Journal: Jurnal Pengabdian Masyarakat International Journal Of Science, Technology & Management (IJSTM) Devotion: Journal of Research and Community Service Extrapolasi International Journal of Social Service and Research JOURNAL OF HUMANITIES, SOCIAL SCIENCES AND BUSINESS (JHSSB) Jurnal Rekayasa Teknik Sipil dan Lingkungan Journal of Social Research Journal Of World Science Journal Of Human And Education (JAHE) International Journal Science and Technology (IJST) Journal of Management, Accounting, General Finance and International Economic Issues (MARGINAL) International Journal on Advanced Technology, Engineering, and Information System (IJATEIS) INJURITY: Journal of Interdisciplinary Studies Journal Research of Social Science, Economics, and Management Eduvest - Journal of Universal Studies Jurnal Ekonomi, Teknologi dan Bisnis Enrichment: Journal of Multidisciplinary Research and Development Asian Journal of Social and Humanities International Journal of Social Science and Community Service
Budi Witjaksana, Budi
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Journal : Enrichment: Journal of Multidisciplinary Research and Development

 1 
Risk Mitigation Analysis in the Construction of Dormitories for Students of Riyadlus Sholihin Islamic Boarding School, Probolinggo City Aditya, Febri; Witjaksana, Budi; Sajiyo, Sajiyo
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 4 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i4.454

Abstract

The implementation of construction projects often faces various risks that can lead to delays, cost overruns, and decreased quality of work. One example occurred in the project to build a dormitory for students of the Riyadlus Sholihin Islamic Boarding School in Probolinggo City, which experienced a time deviation despite acceleration efforts. This shows the importance of implementing systematic risk management to identify and address potential risks from the beginning of project implementation. This study uses a descriptive quantitative approach through the dissemination of questionnaires and interviews to related parties in the project. The analysis was carried out using the Severity Index method to calculate the level of probability and impact of each risk, as well as the probability and impact matrix to determine the level of risk significance. The dominant risk is then further analyzed to determine mitigation actions. The results of the study showed five risks with a "Very High" level, namely the preparation of the wrong work method, poor coordination between parts, the accuracy of completing work within a certain duration, poor planning and scheduling, and low labor productivity. Mitigation strategies are developed to reduce the impact of these risks, including through training, improved communication, the use of planning software, and strengthening the monitoring system. This research makes a real contribution to the risk management of construction projects in a more effective and structured manner.
Analysis of the Acceleration of Implementation Time Using the Crashing Method in the Construction of the Purworejo Bridge, Mojokerto Regency Farchan, Muchamad; Witjaksana, Budi; Sajiyo, Sajiyo
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 4 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i4.458

Abstract

Bridge infrastructure plays an important role in supporting connectivity and regional economic growth. However, in their implementation, bridge construction projects often face delays due to technical factors such as weather, soil conditions, as well as managerial and coordination constraints. One of them occurred in the Purworejo Bridge construction project in Mojokerto Regency which experienced a delay in progress of -14.88% in the 12th week of implementation. This delay requires accelerated efforts so that the project is not included in the critical contract category. This study seeks to examine the approach of accelerating implementation time through the Crashing method through increasing working hours (overtime) and calculating costs efficiently to mitigate delays. The methodology used includes the formulation of a network using Microsoft Project, the identification of critical paths through the Critical Path Method (CPM), and the calculation of acceleration costs based on Cost Slopes. The results of the analysis show that the acceleration of work can be achieved both technically and economically. This method allows the project to reduce delays, thus removing them from the classification of vital contracts. The study significantly improved the decision-making process for the timely and cost-effective implementation of development projects.
Analysis of Construction Costs on the Improvement of the Dupak Road Section in Surabaya City Adiputra, Reza; Wulandari, Esti; Witjaksana, Budi
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 4 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i4.459

Abstract

The rapid growth of traffic in urban areas, especially on the Jalan Raya Dupak Surabaya section, has a significant impact on the decreasing age of road pavement plans and increasing the need for construction costs. This study aims to analyze and calculate the estimated cost of improving the Dupak road section in Surabaya City. Methods Analysis of average daily traffic data (LHR), calculation of single axle equivalent load (ESAL), and rigid pavement structure design taking into account the underlying soil conditions and projected traffic load over the life of the plan of 40 years. The results of the study show that traffic growth of 5.6% per year leads to a significant decrease in the life of the plan if it is not anticipated with the right pavement design. The estimated cost of road improvement reaches Rp 11,513,568,000.00. It is hoped that this research will help in planning the improvement of urban arterial roads to maintain the sustainability and efficiency of transportation infrastructure
Identification of Dominant Factors of Simple House Building Vulnerability in Earthquake-Prone Areas Using RVS and FTA Methods Candra M, Alang; Wulandari, Esti; Witjaksana, Budi
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 6 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i6.488

Abstract

Indonesia is in an active seismic area prone to earthquakes, including the city of Surabaya, which is crossed by the Kendeng Fault. Many modest homes in the area were built without considering earthquake resistance standards, thus posing a high risk of damage and casualties. This research aims to evaluate the reliability level of simple house buildings against earthquakes in the Tandes, Asemrowo, and Sukomanunggal Districts, West Surabaya, which are crossed by the Kendeng Fault. The methods used are Rapid Visual Screening (RVS) based on FEMA P-154 guidelines and Fault Tree Analysis (FTA) as a deductive approach to map the causes of structural vulnerability. The results showed that none of the 30 housing units met the safety criteria; 76.7% of buildings require follow-up evaluation, and 23.3% are classified as unsafe. The dominant factors affecting vulnerability include non-standard foundation conditions, the absence of structural fastening elements, the use of wall materials without reinforcement, and the irregularity of building geometry. These findings indicate the need for technical intervention through structural retrofit, public education about earthquake-resistant buildings, and the formulation of regulations for the construction of residential houses in earthquake-prone zones. The combination of RVS and FTA methods has proven effective in providing a comprehensive overview of the structural condition of existing buildings and can be used as the basis for seismic risk mitigation strategies in urban areas.
Cost Control Analysis Using the Earned Value Method on the Warehouse Construction Package and its Supporting Facilities at Juwata Airport Imaniar, Ridha Annisa; Witjaksana, Budi; Purnama, Jaka
Enrichment: Journal of Multidisciplinary Research and Development Vol. 2 No. 12 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v2i12.316

Abstract

The construction of warehousing and supporting facilities at Juwata Airport has several obstacles that cause delays in the implementation of the work, so a work control method is needed, namely the earned value method by assessing the cost and time performance of project implementation such as Cost Variance (CV), Schedule Variance (SV), Schedule Performance Index (SPI), and Cost Performance Index (CPI) as well as the estimated cost and time of project completion. The purpose of this research is to calculate the amount of cost needed to complete the project of Warehousing Development Package and Supporting Facilities of Juwata Airport on time according to the plan schedule. The method used is the Earned Value Method in evaluating cost performance and time performance. The analysis carried out uses 3 (three) indicators, namely ACWP (Actual Cost of Work Performance), BCWP (Budgeted Cost of Work Performance) and BCWS (Budgeted Cost of Work Scheduled). By using the earned value method, the final project cost estimate obtained from the EAC is Rp. 15,019,062,678.43 and the estimated time / Time Estimate (TE) at week 26 shows 239 calendar days so that the completion time is 28 days late from the contract schedule. And the solution to the delay is to accelerate the work with an additional cost of Rp. 68,970,000. Future research should explore optimization strategies to enhance efficiency in cost estimation and project scheduling.
Analysis of Project Implementation Costs Using the Crashing Method in The Improvement of The Andongrejo-Bandialet Road, Jember District Ardianto, Lukman; Wulandari, Esti; Witjaksana, Budi
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 5 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i5.477

Abstract

Construction project control is a systematic process aimed at ensuring that project objectives align with planning standards. One method used to accelerate project duration is "crashing," which involves reducing the time of specific activities that affect project completion, focusing particularly on activities on the critical path. This research adopts a descriptive method to collect and analyze data on the status of current symptoms related to project time management. Data collection was conducted through documentation, utilizing records, images, and work outputs. The results show that total project costs decrease significantly as the level of time compression (reduction of project duration) increases. However, increasing labor costs exhibits a small but consistent rise, indicating lower cost efficiency. The most optimal project costs were observed when additional working time was utilized, as opposed to adding more labor. In conclusion, while the crashing method is effective for reducing the risk of fines and indirect costs, selecting the best alternative requires balancing productivity and marginal costs (cost-time trade-off). For similar projects, extending working hours proves more cost-effective than increasing workforce size.
Analysis of Project Implementation Costs Using the Crashing Method in the Construction Work of Sunan Ampel Jombang Junior High School Venusia A, M. Fajar; Wulandari, Esti; Witjaksana, Budi
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 5 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i5.479

Abstract

The development of educational infrastructure is a crucial aspect in supporting the improvement of the quality of learning and human resource development in Indonesia. However, in its implementation, construction projects often face challenges in the form of delays in completion and cost inefficiencies, which impact the disruption of the educational process and increase the budget. This study aims to analyze the cost efficiency and acceleration of the implementation time of the Sunan Ampel Jombang Junior High School construction project through the crashing method approach, which is a technique in project management used to accelerate project completion time by selectively adding resources to critical activities. The delay in the start of a project is the main problem faced by the implementers of the Sunan Ampel Jombang Junior High School construction project, resulting in delays in final completion and an inflated project value. Based on the analysis conducted, this study also provides solutions to overcome this. The results of the analysis of the Sunan Ampel Jombang Junior High School construction project show an additional cost of Rp. 163,845,745.00 from the normal work cost to Rp. 2,623,114,845.00, an increase of 0.93%. This research provides practical contributions for project managers and contractors in making strategic decisions related to controlling project time and costs and can be a reference in managing the risk of project delays in the future.
Cost Analysis of Road Performance Improvement on Yos Sudarso Road, Baubau City Nasir, Jamiludin; Witjaksana, Budi; Purnama, Jaka
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 10 (2026): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i10.607

Abstract

Yos Sudarso Road in Baubau City is a major urban corridor that has experienced a decline in traffic performance due to intensive activities in commercial, tourism, and port areas, resulting in high side friction caused by on-street parking and vehicle maneuvering. These conditions reduce the effective road capacity and degrade the level of service. This study aims to estimate the cost required to improve road performance as a basis for practical and applicable traffic management recommendations. The research employs a quantitative approach by identifying improvement alternatives, calculating work volumes, and estimating costs based on the 2022 Indonesian Public Works Unit Price Analysis (Analisa Harga Satuan Pekerjaan, AHSP) for Road and Bridge Works and the 2024 Baubau City Standard Unit Cost (Harga Satuan Pokok Kegiatan, HSPK). The results indicate that traffic management measures in the form of one-side on-street parking arrangement and installation of no-parking traffic signs require a total cost of IDR 57,000,000.00. This cost is relatively economical and effective in improving road capacity and traffic performance without physical road widening.
Topographical Challenges and Cost Risk Management in Road Construction: Integrating Design Analysis and Unit Price Method (AHSP) in Hilly Areas of Indonesia Rustam, Rustam; Witjaksana, Budi; Purnama, Jaka
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 10 (2026): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i10.608

Abstract

Road construction in hilly regions of Indonesia presents complex technical and financial challenges due to extreme topographical variations. This study examines the integration of technical design analysis with the Indonesian Standard Unit Price Method (AHSP) to improve cost estimation accuracy and risk management. Using the Batauga–Sampolawa road project in South Buton Regency as a case study, the research analyzes how longsection and cross-section designs influence earthwork volumes and subsequent cost structures. Results indicate that hilly topography necessitates significant slope stabilization measures and unbalanced cut-fill volumes, directly impacting cost distribution. Through AHSP-based cost projection for 2025, the study identifies critical risk factors including fuel price volatility, material classification uncertainties, and equipment productivity in steep terrain. The research demonstrates that an integrated design-cost approach enables more realistic budgeting and proactive risk mitigation in hilly road projects. Recommendations include the adoption of digital terrain modeling, AHSP adjustment factors for hilly conditions, and contingency planning for geotechnical uncertainties.
Co-Authors A. Asrijal Abdul Q, Muhammad Ali Hasymi Adam, Ijaz Adi Purwanto Adiputra, Reza Aditya, febri Agustian Setyagraha, Javan Akhmad Dahlan Alan Muin, Oskar Ezra Alfianti, Diah Mega Ali Imron, Mohammad Alifia Amalia, Mekar Meilisa Ardhiansyah, Widha Ardianto, Lukman Ari Purwanti Arifin, Syaadiah Ariyanto, Subkhan Asmoro, Mochamad Ranoe Balido, Pandji Thoha S. Cahyono, Febri Candra Kelana Putra, Utuh Dwi Candra M, Alang Dewi, Dita Dismalasari Eko Pramono Ernitasari, Windya Yunesti Esti Wulandari Eva Desembrianita Farchan, Muchamad Firdaus, Muhammad Bayu Gede Sarya, Gede Hamzah, Aulia Hanie Teki Tjendani, Hanie Teki Hardi, Edelbertus Lusius Hartawan, Ade Sholeh Hepiyanto, Rasio Hepiyanto, Rasio Herkunadi, Dimas Fitra Herry Widhiarto, Herry Ibnu Andli Marta Imron, Achmad Imron, Achmad Irfan, Bachtiar Muhammad Irma Martaningtyas, Irma Jaka Purnama K., Moh Ali Lutfi M. Khakimin, Achmad Lukmanul Langi, Jeffrey Payung Lendra Lendra Lesmana, Denny Indra Liza Husnita Lutfi, Moh Ali Meganda, Danniar Firdaus Meilasari, Shavica Kurnia Mochamad Nurcholis Mughni, Amalia Fathimah Azh Zhahra Muhammad Muhammad Muqaddas, Zaiful Nailufar, Linda Nasir, Jamiludin Nofirman, Nofirman Novianto, Muhammad Taufik Nugraha, Budidarma Ardi Nurkaruniati, Titik Oetomo, Wateno Patriadi, Andi Permana, Midi Agus Pramadha, Ichsan Yanuansyah Prastyadi Wibawa Rahayu Pratondo W, Wahyu Proboretno, Wuri Purba, Ulfani Ikhwana Putri, Dwi Cahyani Rafi, Yudha Fatkur Rahmatullah, Yan Raimundo, João Rakasyiwi, Gilang Ramadhan Reresi, Samuel Petrik Reresi, Samuel Petrik Ridha Annisa Imaniar Riduwan, Sanda Praja Ridwan, Ridwan Rohim, Abd. RR. Ella Evrita Hestiandari Rustam Rustam Sajiyo Sajiyo, Sajiyo Septa Intiar SETIAWAN, ENDIK Setyagraha, Javan Agustian Sudrajat, Didi Sugeng Hariyadi, Sugeng Sulistianto, Leo Agus Suroso Suroso Tamrin Fathoni Teguh Prasetijo, Christiawan Teki Tjendani, Hanie Tjendani , Hanie Teki Tjendani, Hani Teki Triska Bayu Wedananta, Komang Gede Veithzal Rivai Zainal Venusia A, M. Fajar Wahananto, Anang Wahyu Pamungkas, Rino Widyarso, Riza Wulandari , Esti Zesario Akbar, Rendy Zuhri, Syaefuddin