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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Sinergi Jurnal Teknik Sipil Civil Engineering Journal Nusantara Science and Technology Proceedings Smart City J-Sil (Jurnal Teknik Sipil dan Lingkungan)
Bambang Trigunarsyah, Bambang
Dosen Pasca Sarjana Program Studi Teknik Sipil, Universitas Indonesia.
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Transportation

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Rekomendasi Tindakan Koreksi Terhadap Penyimpangan Biaya Pembelian Material Konstruksi Veronika, Alin; Trigunarsyah, Bambang; Latief, Yusuf; Abidin, Ismeth
Jurnal Teknik Sipil Vol 12, No 3 (2005)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (98.857 KB)

Abstract

Abstrak. Dalam pelaksanaan proyek konstruksi sering terjadi penyimpangan biaya yang disebabkan antara lain oleh material, peralatan, tenaga kerja, subkontraktor, overhead, dan kondisi umum. Material merupakan komponen biaya utama dalam proyek konstruksi, sehingga manajemen material yang kurang baik dapat mengakibatkan penyimpangan biaya proyek. Pada manajemen material, pembelian material merupakan faktor yang mempunyai pengaruh cukup besar terhadap besar kecilnya harga material. Pengendalian biaya proyek terhadap terjadinya penyimpangan biaya yang disebabkan oleh kurang baiknya pembelian material, dapat dilakukan dengan tindakan koreksi terhadap penyebab-penyebab terjadinya penyimpangan biaya tersebut. Tujuan penelitian dalam makalah ini adalah mengidentifikasi penyebab terjadinya penyimpangan biaya pembelian material dan melakukan rekomendasi tindakan koreksi terhadap penyebab penyimpangan. Pendekatan yang dilakukan untuk mencapai tujuan tersebut adalah dengan melakukan survai terhadap proyek-proyek konstruksi bangunan bertingkat untuk mengidentifikasi penyebab terjadinya penyimpangan biaya pembelian material, serta wawancara kepada para pakar untuk memperoleh rekomendasi tindakan koreksi. Metode analisis yang digunakan dalam penelitian ini adalah analytical hierarchy process (AHP) dan metode Delphi. Hasil penelitian menunjukkan tindakan koreksi yang dilakukan terhadap penyimpangan biaya pembelian material merupakan tindakan pencegahan (before process).Abstract. In delivering construction projects, is not uncommon that cost overrun occur due to variation on materials, equipments, labors, subcontractors, overhead, and general condition. Material contributes around half of the construction project, which make material management becomes an important element in project cost control. And in managing construction materials, purchasing has become major influence on material cost. Corrective actions on cost overrun can be used to overcome the cost variance due to poor material purchasing. This paper is aimed at identifying what causes of purchasing material cost variances and correctice action recommendation. Research method to identifying purchasing material cost variance and corrective action recommendation using questionnaire survey and interview distributed to high rise building projects. Analyze method using analytical hierarchy process (AHP) and Delphi method. The result show that corrective action recommendationon purchasing material cost overrun is preventif action (before process variance).
Penentuan Peringkat Faktor Risiko dalam Rekrutmen Tenaga Kerja yang Mempengaruhi Biaya Tenaga Kerja pada Proyek Riantini, Leni Sagita; Trigunarsyah, Bambang; Abidin, Ismeth; Latief, Yusuf
Jurnal Teknik Sipil Vol 12, No 3 (2005)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (102.661 KB)

Abstract

Abstrak. Dalam melakukan rekrutmen tenaga kerja, terdapat beberapa faktor yang mempengaruhi biaya tenaga kerja. Faktor-faktor ini dapat mengganggu kinerja pelaksanaan proyek dan dapat mengakibatkan terjadinya penyimpangan pada biaya tenaga kerja. Penyimpangan biaya ini perlu dianalisa, dicari penyebabnya dan ditentukan tindakan koreksi yang sesuai. Penentuan tindakan koreksi yang tepat merupakan suatu analisa pengambilan keputusan, yang mana perlu dilakukan analisa terhadap berbagai risiko yang dapat terjadi. Penentuan peringkat faktor-faktor risiko dalam rekrutmen tenaga kerja dapat membantu dalam mengambil keputusan tindakan koreksi yang paling sesuai untuk mengantisipasi penyimpangan yang terjadi. Bobot/nilai pada faktor risiko dapat ditentukan dengan memakai metode AHP (Analytical Hierarchial Process). Faktor risiko dengan peringkat yang tinggi (dengan bobot yang tinggi) berarti memiliki tingkat prioritas yang lebih utama untuk ditangani dan ditanggulangi.Abstract. In labor recruitment, there are several factors that affect the labor costs. These factors can disrupt the project execution and can cause variances in labor costs. These variances need to be analyzed through the roots of the causes and to be corrected. Deciding the proper corrective  action is part of a decision making analysis,where risk analysis is included. Determining the risk ranks from the factors in labor recruitment could support in attaining the suitable corrective action in order to anticipate any variances occurred. AHP (Analytical Hierarchial Process) method can be used to determine the weight/score of the factors. Factors that have high ranks (with high weighted factor) are factors with high risk priorities that need to be assessed and handled
Hambatan Penerapan Konstruksi Berkelanjutan: Perspektif Pemerintah Willar, Debby -; Trigunarsyah, Bambang
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 1, JULI 2021
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.215 KB) | DOI: 10.14710/mkts.v27i1.33764

Abstract

Konstruksi berkelanjutan merupakan cara bagi industri konstruksi menuju tercapainya pembangunan berkelanjutan dengan mempertimbangkan isu-isu sosial, ekonomi, lingkungan dan budaya. Kebijakan untuk menerapkan konstruksi berkelanjutan pada penyelenggaraan infrastruktur masih belum dipahami dengan jelas sehingga mengakibatkan konsep konstruksi berkelanjutan masih sulit diterapkan oleh perencana maupun pelaksana konstruksi infrastruktur. Studi penelitian ini mengidentifikasi kendala-kendala penerapan konstruksi berkelanjutan pada pembangunan proyek infrastruktur di lingkungan sektor Bina Marga, Cipta Karya, Sumber Daya Air, dan Perumahan Permukiman di Provinsi Sulawesi Utara. Pengumpulan data dengan wawancara semi-terstruktur melibatkan 23 orang informan yang berasal dari empat sektor tersebut. Hasil studi menemukan hambatan-hambatan yang merata terjadi pada empat sektor dalam menerapkan kebijakan konstruksi berkelanjutan disepanjang siklus hidup proyek infrastruktur, yaitu: (1) tahap pemograman berkaitan dengan dokumen renstra dan identifikasi hambatan, (2) tahap perencanaan teknis berkaitan dengan pemahaman teknis dan kompetensi penyedia jasa, (3) tahap pelaksanaan konstruksi berkaitan dengan konsultan ahli, kompetensi penyedia jasa, dan teknologi konstruksi hijau, (4) tahap pemanfaatan berkaitan dengan sosialisasi, promosi dan edukasi, (5) tahap pembongkaran berkaitan dengan mekanisme dan ketersediaan sumber daya. Hasil studi menyediakan informasi berbasis akademik bagi pemerintah dalam upaya meminimalisir hambatan penerapan kebijakan konstruksi berkelanjutan di seluruh wilayah Indonesia.  
Evaluating The Basement Design of Low-Rise Building with Two-Stage Analysis using BIM Integration: Hangar Study Case Tohho, Given; Sjah, Jessica; Rarasati, Ayomi Dita; Trigunarsyah, Bambang
Smart City Vol. 4, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Building Information Modelling (BIM) has revolutionized the way the construction industry designs, constructs, and manages buildings. Certainly, the utilization of BIM can optimize the usage of materials in a construction project, considering the high level of concrete consumption globally and its significant environmental impact. The implementation of BIM is intended to calculate the volume of concrete and steel material usage in the design process of low-rise buildings with basements, exemplified in this case by a 5-story laboratory hangar with a 1-story basement. The building design is carried out through a two-stage analysis, which involves separating the upper portion from the lower portion of the structure. This analysis procedure is commonly conducted in building design with basements. When designing the lower portion, some practitioners often neglect the lateral soil forces in the global model when designing the column and beam elements, assuming that these forces are sufficiently small and can be accommodated by basement wall reinforcement. In this research, with a shallow basement depth configuration, the study compares the extent of differences in structural dimensions and materials caused by these lateral forces. Significant variations in volume are observed in perimeter columns, primarily due to direct soil loads acting on this area. Additionally, considering the function of these columns as boundary elements for the basement walls, such differences are expected. The application of lateral soil forces on basement walls is determined by the specific basement configuration being designed. This includes assessing whether there are additional walls outside the basement walls, which can be analyzed locally since they are assumed to bear the lateral soil loads occurring. Different analyses yield varying reinforcement and concrete volumes in basement structures, especially between models with and without lateral soil loads, resulting in a 7.73% difference in reinforcement and 4.69% difference in concrete volume.
Application Development of Building Maintenance Periodization on Surabaya City Government Property Putra, I Nyoman Dita Pahang; Suryani, Erma; Mudjahidin; Trigunarsyah, Bambang; Diyasa, I Gede Susrama Mas
Nusantara Science and Technology Proceedings 8th International Seminar of Research Month 2023
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2024.4136

Abstract

Building maintenance is a very important activity and requires regular or scheduled implementation so that financial budgeting can be prepared and scheduled better. The building maintenance application is managed at the Regional Apparatus Work Unit through the Building Maintenance Section which inputs coding, building name, Final Hand Over (FHO) time, maintenance period, components and types of work, amount, unit cost, and construction cost. Observation data was collected on one hundred schools and government buildings for 5 years. Identify the components and types of work that require maintenance through interviews with the infrastructure division of each building that is surveyed. Observations and interviews are needed as a basis for determining the components and types of work that often occur in damage to each building after FHO. After the data is inputted, to prove the actual damage conditions to the buildings being reviewed, verification is required by the infrastructure division in each building. Verification consists of: building name, FHO time, maintenance period, components and types of work, quantity. The infrastructure division cannot see and change unit costs and development costs. Decision making on the implementation of building maintenance from the existing output is carried out by the Head of the Regional Apparatus Work Unit. Decisions taken by the Head of the Regional Apparatus Work Unit are expected to represent the priority scale of building maintenance that must be carried out by the Regional Apparatus Work Unit. In this building maintenance application, the total maintenance costs for each building and each month can be generated every year, and the total maintenance costs for the entire building and every month for each year, and the level of damage can be generated for each maintenance carried out on each building, and can the components and types of work to be carried out each month are known.
Fuzzy Bayesian Belief Networks Method on Risk Assessment of EPC Pipeline Project Yusuf, Muhammad; Latief, Yusuf; Rarasati, Ayomi Dita; Trigunarsyah, Bambang; Laksono, Naufal Budi
Civil Engineering Journal Vol 11, No 3 (2025): March
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-03-013

Abstract

Subsea gas pipeline projects are experiencing significant technical and managerial challenges across Engineering, Procurement, and Construction (EPC) phases. To address the challenges, effective risk management in the early project phases is essential to mitigating cascading failures that cause significant schedule delay and cost overrun. Therefore, this study aimed to apply the Fuzzy Bayesian Belief Networks (FBBNs) method to model risk assessment during EPC phases. The findings showed that FBBNs made it possible for a new way to evaluate risks, find interdependencies, and guess what would happen next, which created a strong framework for reducing risk. Based on probabilistic analysis as supported by expert elicitation, risks from the early phase of engineering and procurement showed high probabilities of occurrence, including Incompetent Personnel, Project Mismanagement, Unsupportive Stakeholder, Corruption, and Design Inaccuracies. A significant impact was also observed on Construction Rework, Material Quantity Increase, Construction Delay, and Cost Overrun. The results showed the importance of addressing systemic issues early in the EPC project lifecycle, emphasizing personnel competency, design accuracy, strategic and project management planning, procurement management, stakeholder management, and constructability preparation to reduce vulnerabilities. This integrated method aimed to enhance accuracy predictions by determining causal risk probability relationships in high-risk offshore environments of EPC subsea gas pipeline projects. Doi: 10.28991/CEJ-2025-011-03-013 Full Text: PDF
Optimizing Organizational Performance in Bridge Maintenance using Stakeholder Analysis Karim, Rully Andhika; Laksono, Naufal Budi; Ardiyanto, Fahreza; Latief, Yusuf; Trigunarsyah, Bambang
Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 1: April 2025
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.10.1.127-138

Abstract

Bridge maintenance and care is an important aspect in maintaining the safety and efficiency of transportation infrastructure. However, challenges in coordination between various stakeholders often hamper operational effectiveness. This study aims to analyze the organization of bridge maintenance and care work using a stakeholder analysis approach, in order to improve organizational performance. The methods used in this study are qualitative and quantitative approaches, involving data collection through in-depth interviews and surveys of stakeholders, including the government, contractors, and user communities. The data obtained were analyzed to identify factors that influence organizational performance in bridge maintenance. The results show that active stakeholder involvement and effective communication contribute significantly to increasing efficiency and effectiveness in the bridge maintenance process. This study confirms that the application of stakeholder analysis can improve organizational performance in bridge maintenance by strengthening relationships between stakeholders and responding to their needs and expectations. Practical recommendations for the implementation of this strategy are presented, including the importance of communication training and collaboration between stakeholders. This study is expected to contribute to the development of policies and best practices in bridge infrastructure maintenance in the future.
Optimization of material requirements to support the accuracy of delivery materials based on quantity of cubicost analysis results Fandini, Reina Maulidya; Putra, I Nyoman Dita Pahang; Trigunarsyah, Bambang
SINERGI Vol 29, No 3 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2025.3.017

Abstract

Construction projects heavily rely on labor, materials, and equipment to ensure timely completion, with materials being a significant cost component. This study addresses discrepancies between rebar inventory and material demand, which can disrupt production and delay project completion. This study aims to determine the rebar volume using Cubicost TRB and optimize the lowest requirement cost by applying the Silver-Meal and Wagner-Whitin algorithms. Detailed engineering data supports the application, ensuring rebar bends meet technical standards at beam, column, and slab intersections. Material planning incorporates project schedules, inventory records, and rebar volume data from Cubicost. This planning considered the minimization of ordering and storage costs. The results showed that the volume of rebar calculated using the Cubicost application was more accurate than the project's bill of quantity data. The use of the Cubicost application proved to be more advantageous, resulting in a 1% reduction compared to the project data. Then, the Silver Meal algorithm resulted in total costs that were 21% lower than those of the Wagner-Whitin method in minimizing overall inventory costs, particularly for high-demand rebar types such as D13 and D19. These findings highlight the importance of accurate inventory scheduling and selecting appropriate lot-sizing techniques to minimize costs and prevent delays. Future research can compare Cubicost TRB’s accuracy with other software and extend the Silver-Meal and Wagner-Whitin algorithms to other materials.
Co-Authors Alin Veronika, Alin Ardiyanto, Fahreza Debby Willar, Debby Diyasa, I Gede Susrama Mas Erma Suryani Fandini, Reina Maulidya Ismeth Abidin, Ismeth Karim, Rully Andhika Laksono, Naufal Budi Leni Sagita Riantini, Leni Sagita Mudjahidin Muhammad Yusuf NYOMAN DITA PAHANG PUTRA, NYOMAN Rarasati, Ayomi Dita Sjah, Jessica Tohho, Given Yusuf Latief