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The Risk Analysis of Work Accidents Using The Bowtie Method in The Ciputra Hospital Construction Project Dewi, Risda Yasinta; Pahang Putra, I Nyoman Dita
Jurnal Teknik Sipil Vol. 17 No. 1 (2024): Juni 2024
Publisher : Faculty Of Engineering University 17 August 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/jts.v17i1.1566

Abstract

The condition of work accident risk is a critical factor that needs to be taken seriously. Related to the construction of the Ciputra Hospital Project located on Jl. Made Selatan - Citraland Surabaya, the Ciputra Hospital project is planned to be built on nine floors with a building area of 23,000 m2, which will allow for various occupational accident risks. So, a risk analysis is needed to identify hazards that can occur. In this study, data collection was carried out through interviews and also distribution questionnaires. Questionnaires are used to find probability and severity scales, and questionnaires are distributed to project expert staff. After obtaining the results from the questionnaire, a risk assessment is carried out by finding the probability index and severity index and then determining the category with the risk matrix. After determining the category, the analysis was carried out using the bowtie method. The result of this study is to determine the most dominant risks, namely workers being punctured by sharp equipment when installing formwork, workers falling from a height when installing formwork, and workers being hit by a bar bender machine when forming. After analyzing using the bowtie method, it was found that the causes of the risk of accidents that occurred included workers in a tired condition, lack of concentration, and carelessness, incomplete use of PPE, undisciplined workers at work, no safety at the job site, bad weather, inexperienced workers, poor machine conditions.
The Implementation of BIM Tekla Structure on Quantity Take Off for Structural Works of X Building Project Eka Aprillia; Pahang Putra, I Nyoman Dita
Jurnal Teknik Sipil Vol. 17 No. 1 (2024): Juni 2024
Publisher : Faculty Of Engineering University 17 August 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/jts.v17i1.1567

Abstract

BIM technology in the construction world is growing. However, the application of BIM in Indonesia has not been carried out thoroughly. BIM technology can help quantity take off work that affects the success or failure of a project. BIM can reduce the error rate of quantity take off planning calculations compared to manual calculations. Tekla Structure is one of the software developments of BIM that can produce quantity take off building output along with 3D visualisation. This research conducts 3D modelling and discusses the comparison of quantity take off using BIM-based software Tekla Structures with a recap of the manual calculation contained in the initial Bill of Quantity for the X Building Project planning. This difference can be used as a consideration for the application of BIM in the initial calculation of project planning. The percentage difference obtained for the pile cap resulted in concrete volume deviation of 0.69% and -19.1% for reinforcement volume. The spun piles work resulted in a concrete volume deviation of -0.8% and reinforcement volume of 8.45%. In the calculation of column work, the deviation value for concrete volume is 3.14%, while the volume of reinforcement is -12.2%. The results of the BIM quantity take-off are deemed more reliable due to the 3D visualization of BIM objects and the ability to adjust the detail of work elements.
ANALISIS BIAYA MANAJEMEN RISIKO PADA PROYEK PENGAMAN MUARA SUNGAI BOGOWONTO SISI TIMUR (KSN) YIA Putri, Ardelia Dewani; Putra, I Nyoman Dita Pahang
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 11 No. 1 (2023): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

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Abstract

Abstrak: Analisis Biaya Manajemen Risiko Pada Proyek Pengaman Muara Sungai Bogowonto Sisi Timur (KSN) YIA. Analisis biaya manajemen risiko pada Proyek Pembangunan Pengaman Muara Sungai (jetty) merupakan hal yang penting dilakukan untuk penelitian. Bangunan pengaman sungai atau jetty sendiri memiliki bermacam-macam risiko proyek yang dapat menghambat proses kegiatan pada proyek serta mempengaruhi pencapaian proyek. Dampak dari risiko tersebut selain mempengaruhi biaya juga menimbulkan keterlambatan proyek. Berdasarakan permasalahan yang disebutkan diatas, tujuan dari penelitian ini untuk mengetahui risiko yang terjadi pada Proyek Pembangunan Pengaman Muara Sungai Bogowonto Sisi Timur (KSN) YIA serta menganalisis biaya dan mengetahui tindakan mitigasi risiko tersebut. Pada penelitian ini menggunakan metode wawancara sebagai pengumpul data. Sebagai analisis kuesioner menggunakan metode rata – rata (mean) dan untuk analisis biaya menggunakan Cost / Benefit Analysis (CBA) atau analisis biaya / manfaat. Hasil analisis kuesioner menggunakan metode rata-rata (mean) menunjukkan 5 risiko tinggi yang memerlukan mitigasi dan hasil analisis biaya memberikan rekomendasi 4 upaya tindak lanjut yang layak diterapkan dan 1 upaya tindak lanjut yang tidak layak diterapkan. Upaya tindak lanjut yang tidak layak tersebut dikarenakan biaya yang dikeluarkan antara nilai risiko terlalu besar dan biaya implementasi yang tinggi pula, alhasil risiko harus dimitigasi sejak awal. Kata kunci: Manajemen Biaya Risiko; Rata-Rata; CBA Abstract: Cost Analysis Of Risk Management In Security Projects East Side Of The Bogowonto River (Ksn) Yia. Analysis of risk management costs in the Estuary River Safety Development Project (jetty) is an important thing to do for research. The river or jetty safety building itself has various project risks that can hinder the process of project activities and affect project achievement. The Severity of these risks besides affecting costs also causes project delays. Based on the problems mentioned above, the purpose of this study is to determine the risks that occur in the East Side of the Bogowonto River Estuary Development Project (KSN) YIA and to cost analyze and know the risk mitigation measures. In this study using project data as data collectors. As a questionnaire analysis using the average method (mean) and for cost analysis using Cost / Benefit Analysis (CBA) or cost / benefit analysis. The results of the questionnaire analysis using the mean method show 5 high risks that require mitigation and the results of the cost analysis provide recommendations for 4 follow-up actions that are feasible and 1 follow-up that is not feasible. These follow-up efforts are not feasible because the costs incurred between the value of the risk are too large and the costs of implementation are also high, as a result the risk must be mitigated from the start. Keyword: Cost Risk Management, Mean, CBA
ANALISIS RISIKO PADA JEMBATAN JALUR GANDA JALAN KERETA APILINTAS SURABAYA – SOLO (PAKET:JGMS 8) Amala, Aprilia Suci; Putra, I Nyoman Dita Pahang
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 11 No. 1 (2023): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

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Abstract

Abstrak: Analisis Risiko pada Jembatan Jalur Ganda Jalan Kereta Api Lintas Surabaya – Solo (Paket:JGMS 8). Dalam proyek konstruksi tidak lepas dari adanya risiko yang terjadi. Risiko tersebut bisa saja memengaruhi kelangsungan pekerjaan proyek. Maka dari itu perlu dilakukan analisis manajemen risiko. Tujuan dari manajemen risiko untuk mengetahui risiko yang muncul pada proyek tersebut, menentukan level risiko, serta cara penanganan pada risiko yang dominan, Teknik pengumpulan data pada penelitian ini berupa data primer dari hasil wawancara dan kuesioner, dan data sekunder dari hasil studi literatur. Hasil dari identifikasi risiko adalah terdapat 23 variabel risiko yang terjadi pada proyek ini dan hasil dari analisis risiko terdapat 5 variabel yang memiliki level ekstrim yaitu debit air tinggi/banjir, membludaknya sampah di sekitar area proyek, iklim ekstrim, harga bahan bakar naik, kenaikan hara material dan 4 variabel yang memiliki level tinggi yaitu terjadinya longsor saat pekerjaan struktur bawah jembatan, truck mixer telat dating, proses produksi berdampak negatif, dan kerusakan alat berat. Respon risiko pada penelitian ini dilakukan untuk risiko yang memiliki level risiko ekstrim dan tinggi sebanyak 9 variabel. Respon risiko yang dilakukan dengan cara mengurangi risiko dan menghindari risiko. Kata kunci: analisis risiko; jembatan kereta api; manajemen risiko Abstract: Risk Analysis on the Surabaya – Solo Cross Railway Double Track Bridge (Package:JGMS 8). In a construction project, there are risks that occur. These risks may affect the continuity of project work. Therefore its necessary to do a risk management analysis. The purpose of risk management is to find out the risks that arise in the project, determine the level of risk, and how to handle the dominant risks. Data collection techniques in this study are in the form oof primary data from interviews and questionnaires, and secondary data from the result of literature studies. The result of risk identification are that there are 23 risk variables that occur in this project and the results of the risk analysis are that there are 5 variables that have extreme levels, namely high water discharge/floods, overflowing of waste around the project area, extreme climate, rising fuel prices, rising nutrients materials and 4 variables that have high levels, namely the occurrence of landslides during the construction of the under-bridge structure, mixer trucks arriving late, the production process has a negative impact, and heavy equipment damage. The risk response in this study was carried out for risks that have extreme and high risk levels as many as 9 variables. Risk response is carried out by reducing risks and avoiding risks. Keyword: risk analysis; railroad bridge; risk management
Technical Factor Analysis that Impacts Building Maintenance in the Retention Phase Ramadhani, Achmad Nur; Putra, I Nyoman Dita Pahang
Civil and Sustainable Urban Engineering Volume 6 - Issue 1 - 2026
Publisher : Tecno Scientifica Publishing & Society of Tropical Science and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/csue.v6i1.947

Abstract

Building maintenance during the retention phase (Defects Liability Period) was a critical stage in construction projects because defects frequently emerged after handover and could cause delays, cost overruns, and disputes between owners and contractors. In Indonesia, although a retention fund mechanism was applied, maintenance performance during this phase often remained suboptimal. This study aimed to identify and quantify the influence of technical factors on building maintenance success in high-rise projects during the retention phase in Surabaya. Data were collected through a structured questionnaire using a five-point Likert scale from 31 project staff members with relevant professional experience, selected using purposive sampling. The analysis was conducted using Partial Least Squares–Structural Equation Modeling (PLS-SEM) to evaluate both the measurement and structural models, supported by supplementary regression analysis. The results showed that technical factors had a strong and significant effect on building maintenance success, with material availability emerging as the most influential technical factor, while schedule planning was the most dominant success criterion. The high R² and effect size values indicated that technical factors played a substantial practical role in determining maintenance performance during the retention phase. These findings highlighted the importance of effective material logistics, systematic maintenance planning, and strict quality control. Overall, the study demonstrated that improved technical management practices significantly enhanced maintenance performance. From a practical perspective, contractors were encouraged to establish stockpiles of essential materials and adopt digital tools for maintenance planning to ensure timely execution, smooth operations, and effective cost control during the retention phase.
Identifying Supply Chain Risks Influencing Contractor Profitability Using Structural Equation Modeling Ananda, Fikri Arief; Putra, I Nyoman Dita Pahang
Civil and Sustainable Urban Engineering Volume 6 - Issue 1 - 2026
Publisher : Tecno Scientifica Publishing & Society of Tropical Science and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/csue.v6i1.948

Abstract

The construction supply chain involved complex interactions among stakeholders and was exposed to various risks that could affect contractor profitability. However, existing studies had rarely integrated Structural Equation Modeling (SEM) and the Relative Importance Index (RII) to simultaneously capture both statistical relationships and practitioners’ perceptions, particularly in the context of high-rise building projects in Indonesia. This study aimed to identify and analyze supply chain risks in the flows of information, materials, and funds and to examine their influence on contractor profitability. Data were obtained from structured questionnaires distributed to 50 respondents across five high-rise projects in Surabaya. The data were analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM) alongside RII. The SEM results revealed that all three flows, information, materials, and finances, significantly improved contractor profitability, with information flow having the strongest effect. The RII rankings indicated that information risks were the primary concern, particularly unclear communication and errors in conveying project scopes. Comparing the statistical significance identified by SEM with the practical perceptions captured by RII revealed key gaps between measured impacts and practitioners’ views, thereby improving risk prioritization. Overall, this study advanced construction supply chain risk research by integrating SEM and RII methods, while providing practitioners with actionable recommendations to improve information sharing, streamline material handling, and strengthen financial management to enhance profitability.
Analisis Perbandingan Dinding Precast Dan Bata Ringan terhadap Waktu Dan Biaya Pada Facade Proyek Pakuwon Residence Bekasi Mixed Use Development Ewaldo Anggara Putra; I Nyoman Dita Pahang Putra; Nia Dwi Puspitasari
BRILIANT: Jurnal Riset dan Konseptual Vol 11 No 1 (2026): Volume 11 Nomor 1, Februari 2026
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/briliant.v11i1.2197

Abstract

The selection of construction materials plays an important role because it directly affects the quality of the building, as well as the time and cost aspects of the work implementation. In general, the material used for wall work is lightweight brick, along with the times various new materials have been introduced to increase the efficiency of time and cost of work, including precast concrete. These two materials have different implementation methods that can affect the difference in time requirements and implementation costs. This study aims to compare the percentage of time and cost differences in the work of the outer wall facade of the building by modifying the use of precast concrete walls to lightweight bricks. The research methods used include direct observation in the field and literature study. The analysis results show that using precast concrete for building facade walls is more economical with a cost difference of Rp.6,692,903,056.39, or about 26% cheaper than lightweight bricks. The use of precast concrete is more affordable but requires stricter and more thorough supervision during implementation. The duration of time on facade work using precast concrete walls is also more efficient, with a completion time of 8.6% faster or equivalent to a savings of 17 days compared to using lightweight bricks.
Efficiency Analysis of the Combination of Heavy Equipment Use in Excavation and Landfill Work in Road Construction Projects Usman Hadianto; I Nyoman Dita Pahang Putra
Physical Sciences, Life Science and Engineering Vol. 2 No. 3 (2025): June
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/pslse.v2i3.438

Abstract

An efficient heavy equipment management system is needed to complete a earthwork on time. This study aims to analyze the productivity and efficiency of the combination of heavy equipment used in excavation and heap work. Heavy equipment productivity is calculated based on cycle time in the field and its needs are calculated based on the volume of the weekly plan. After that, an efficient combination of heavy equipment planning is carried out for excavation and heaping work. The method of calculating heavy equipment needs uses a theoretical approach, with cycle time adjustments based on operational conditions in the field. Efficiency analysis and heavy equipment selection are carried out based on the idle time of the smallest heavy equipment. The Optimal cut-fill Pairing and Sequencing (OPS) method is used to create a scheme of excavation and heaping work. The results of the analysis showed that the most efficient combination of heavy equipment used in excavation work of 14,467.66 BCM every week was 4 units of Kobelco PC 200 excavators, 2 units of Kobelco SK 330 excavators, and 10 units of Hino 500 dump trucks. Meanwhile, in the backfill work of 5,423.96 CCM every week, 1 unit of Komatsu D68ESS bulldozer, 1 unit of Sakai SV512TF sheepfoot roller, and 1 unit of Sakai vibro roller SV512TF are needed. This combination is chosen based on the value of the smallest idle time. With proper planning, high work efficiency, operational cost savings, and project completion are achieved according to the set schedule
Comparative Analysis of Formwork Systems: Cost Efficiency and Time Management in Construction Projects Auliyah Shabirah Supriyono; I Nyoman Dita Pahang Putra; Bambang Trigunarsyah
Advance Sustainable Science Engineering and Technology Vol. 7 No. 2 (2025): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i2.1320

Abstract

Formwork systems are essential for achieving efficiency and sustainability in multi-story construction. This study compares the cost and time efficiency of multiplex and aluminum formwork systems for constructing beams and slabs on the 6th to 13th floors. Field observations and a literature review were employed to gather data using a mixed-methods approach. This study adopts a mixed-methods approach, combining quantitative and qualitative methods. The findings reveal that aluminum formwork requires 60 days to complete, compared to 112 days for multiplex formwork, saving 52 days. Regarding cost, aluminum formwork amounts to IDR 1,805,910,198, offering savings of IDR 159,540,423 compared to multiplex formwork at IDR 1,965,450,621. Graphical analysis highlights the advantages of aluminum formwork in optimizing project workflows and reducing delays. These results demonstrate aluminum formwork potential to enhance efficiency, minimize material waste, and support sustainable construction practices. Future research is encouraged to explore alternative materials and labor strategies to further advance sustainability in the construction industry.
Exploration of Identification at Each Phase to Advance Productivity Towards Sustainable Practices Azhahra Divia Putri; I Nyoman Dita Pahang Putra; Adibah Nurul Yunisya
Advance Sustainable Science Engineering and Technology Vol. 7 No. 2 (2025): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i2.1333

Abstract

This study analyzes the productivity of tower cranes in high-rise building construction projects in Indonesia, focusing on sustainable practices and advanced techniques. The rapid growth of infrastructure has heightened competition in the construction sector, making efficiency essential. Tower cranes are key to accelerating project timelines and reducing costs, but their productivity can differ between theoretical specifications and actual field conditions. Using a quantitative descriptive method, this study compares theoretical productivity based on equipment specifications with direct field observations of the Potain MCT 205 tower crane at a high-rise site. Data on cycle time and lifting volume for work such as column reinforcement and concrete pouring were collected. Results show that theoretical productivity is higher than field observations, with a 40% increase for works and up to a 92% increase per phase. The findings stress the importance of incorporating advanced planning and sustainable practices to optimize productivity, minimize delays, and reduce costs in construction projects
Co-Authors Afif, Syahril Nur Khusna Alam, Muhammad Miftakhul Alfonsus Fung Abimanyu Wicaksono Alyaa Athooya Minarosi Amala, Aprilia Suci Amelia Indah Faradilla Ananda, Fikri Arief Anggraeny, Anggi Dwi Anna Rumintang Anwar, Nadjadji Aprilia Regita Tri Cahyani Asyari, Saidatul Alfena Putri Awati, Mawinda Oktrify Azhahra Divia Putri Bagas Andrian Permana Bambang Trigunarsyah Bambang Trigunarsyah, Bambang Bangun Muljo Sukojo, Bangun Muljo Budi, Fakhruddin Prasetya Chakim, Ahmad Ibnul Christabella, Cynthia Cielly Christiono Utomo Dewanty, Maharani Putri Dewi, Risda Yasinta Diyasa, I Gede Susrama Mas Dwi Lutfil Khakim Eka Aprillia Erma Suryani Ewaldo Anggara Putra Fadillah, Naufal Luthfi Fandini, Reina Maulidya Fatimah, Alifah Siti Haholongan M, Aris Pistar I Gede Susrama Mas Diyasa I Made Merdana Ilham Arista Harahap Jagad, Sulthanul Auliya Junianda Velantika, Griselda Mahajana, Adam Niestera Mahardini, Hirdayanti Andina Raissha Mahrusah, Safira Manurung, Liza Olivia Maura Muzdhalifa, Rencany Mei Lutfi Yudhitasari Meylinda Sabrinawati Mitasari, Agusvivia Mohammad Rafka Mahendra A Mohammad Rafka Mahendra Ariefwan Mudjahidin Muttaqin, Muh. Darul Muzaffar, Risal Muzdhalifa, Rencany Maura Napitupulu, Roma Artha Uly Natasya, Dininda Ni Made Ika Marini Mandenni Ni Made Ika Marini Mandenni Nia Dwi Puspitasari Nia Dwi Puspitasari Ningtyas, Diah Kurniawati nur hanifah eka putri Panjaitan, Nita Jesika Pinky Febrilla Carienta Putri Prasasto, Adi Radityo Putra, Moch. Maulana Kurnianda Saputra Putri, Ardelia Dewani Rahayu, Jatiningrum Ramadhani, Achmad Nur Rangga Laksana A Rangga Laksana Aryananda Rifky, Fariz Romadhoni, Firda Amalia Putri Salim, Abdurrosid Salsabila Aulia Ayu Lestari Putri Ghozali Sampurno, Ilham Ade Widya Santi Dwi Rahmawati Setiawan, Nanang Sianturi, Niel Tamsoju Silvia, Juniar Megah Siska Ayu Aprilia Yusuf Supriyono Supriyono Usman Hadianto Utami, Imanda Prasetya Velantika, Griselda Junianda Wardana, Zahra Ramadhani Widowati, Elok Dewi Yunisya, Adibah Nurul Zetta Rasullia Kamandang