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All Journal Journal of Social Science Journal of Social Research COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat International Journal of Hydrological and Environmental for Sustainability TRANSPUBLIKA INTERNATIONAL RESEARCH IN EXACT SCIENCES (TIRES) Acitya Wisesa: Journal of Multidisciplinary Research INJURITY: Journal of Interdisciplinary Studies Jurnal Teknik Indonesia Journal of Social Science Enrichment: Journal of Multidisciplinary Research and Development International Journal of Social Science and Community Service
Esti Wulandari
Universitas 17 Agustus 1945 Surabaya
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Transportation Other

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Analysis of Project Implementation Costs Using the Crashing Method in the Construction Work of Sunan Ampel Jombang Junior High School M. Fajar Venusia A; Esti Wulandari; Budi Witjaksana
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.
Identification of Dominant Factors of Simple House Building Vulnerability in Earthquake-Prone Areas Using RVS and FTA Methods Alang Candra M; Esti Wulandari; Budi Witjaksana
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.
Time and Cost Analysis Using the Critical Chain Project Management Method in the Retrofitting Work of the East Java Province Human Rights Office Building into a Green Building Christio Aji Sasongko; Hanie Teki Tjendani; Esti Wulandari
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 9 (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.v3i9.568

Abstract

The retrofitting work of the East Java Province Public Works Office Building into a Green Building encountered several obstacles during the construction process that caused delays in the execution of the work. Therefore, scheduling control is needed using the Critical Chain Project Management method. CCPM aims to manage scheduling design and process control by concentrating on eliminating multitasking, Parkinson's Law, and student's syndrome, which have been considered to cause suboptimal field work execution time and increased waste in terms of time. CCPM also has a buffer mechanism used in scheduling as a tool to protect project schedules from uncertainty, ensuring that every task can be completed on time. By using the Critical Chain Project Management method, a project buffer value of 26 days and a feeding buffer of 11 days were obtained, so that the original work duration of 180 days would become 143 days if the entire buffer of 37 days was not applied. The implementation cost with a value of Rp. 32,048,830,700 can be more efficient at Rp. 30,584,593,995 if the entire buffer is not used, with a project buffer saving of Rp. 1,028,923,090 and feeding buffer savings of Rp. 435,313,615, resulting in a total work cost savings of Rp. 1,464,236,705.
Co-Authors Ade Sholeh Hartawan Ahmad Rois Aki’ Suprapto Alang Candra M Andi Patriadi Andi Patriadi Andiyan Andiyan Arik Nur Cahyo Atma Djendra Purbo Bela Prayogo Budi Witjaksana Budi Witjaksana Budi Witjaksana Christio Aji Sasongko David Himawan Susetya domingos godinho Dwi Atwin Suyitno Dwi Erry Nopriyanto Ean Fadhillah Nurrahmat Fadzil Abdillah Ghufran Helmi Aziz Hanggana Prayuda Bakti Hanie Teki Tjendani Hanie Teki Tjendani Hanie Teki Tjendani Hanie Teki Tjendani Hasan Alif Fathurokman Jaka Purnama Jamiludin Jamiludin Jarwoto Jarwoto Jenodius Aldino John Jiden Desta Mahendro Kris Minaryo Laksono Djoko Nugroho Leo Agus Sulistianto Linda Nailufar Lukman Ardianto M. Fajar Venusia A Maya Yusnita Muchamad Lutfi Muhammad Efendi Muhammad Zainal Muttaqin Muhammad Zainal Muttaqin Ony Frengky Rumihin Orlando Gomes Rahmad Junaidi, Rahmad Rahmat Rahmat Rony Zakariya Rony Zakariya Shreeniwas Omanwar Slamet Riyadi Thomas Aquino Seki Tisno Subroto Ummatus Sholikhah Wahyu Kusuma Wardhana Yunaidi Supriyanto