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International Journal of Sustainable Building, Infrastructure and Environment
Published by Universitas PGRI Semarang
ISSN : -     EISSN : 27164829     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
International Journal of Sustainable Building, Infrastructure, and Environment (IJOSBIE) is a peer-reviewed open-access international scientific journal who aims to provide an international platform for researchers, professionals, lecturer, and educational practitioners on all topics related to sustainable building, infrastructure, and environment issues, insight by leading scholars, theorists, and practitioners worldwide. IJOSBIE papers will be published twice a year on January and July by Universitas PGRI Semarang, Jawa Tengah, Indonesia.
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 5 Documents
 1 
Search results for , issue "Vol 6, No 1 (2025)" : 5 Documents clear
Mitigating Workplace Accident Risks through Job Safety Analysis (JSA) in the Reconstruction of Post-Earthquake Buildings in Cianjur Regency Christian, Johan
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 6, No 1 (2025)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v6i1.20015

Abstract

The reconstruction of buildings post-earthquake presents significant challenges, particularly in ensuring the safety of construction workers. This study focuses on the application of Job Safety Analysis (JSA) to mitigate workplace accident risks in the reconstruction of buildings in Cianjur Regency, Indonesia, following a major earthquake. By systematically identifying hazards and implementing control measures, JSA aims to improve safety outcomes and support successful project completion. This paper presents a comprehensive analysis of JSA methods, their application in the context of earthquake reconstruction, and their effectiveness in reducing workplace accidents.Keywords: JSA, risk, mitigation
Cost and Time Control Analysis in the Neucentrix Building Renovation Project Using the Earned Value Method Pinuji, Putri; Suwandi, Putri Anggi Permata; Rizani, Mohammad Debby
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 6, No 1 (2025)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v6i1.20122

Abstract

In the Neucentrix renovation project, an addendum caused an extension. This study analyzes the weekly performance of the 2023 Neucentrix Pugeran Yogyakarta Project in terms of cost and time using the Earned Value method. The data analyzed using the Earned Value method using ACWP, BCWS, and BCWP indicators. From these indicators, CV, SV, CPI, SPI, EAS and EAC values are obtained. The analysis reveals cost savings from the first to the seventeenth week, with initial acceleration in the first four weeks followed by delays from weeks five to seventeen. The project is expected to take 19 weeks to complete, with a final estimated cost of IDR 2,294,673,540.
ANALYSIS OF FLOOD DISCHARGE OF THE BLORONG RIVER, KENDAL DISTRICT Apriarso, Dally; Kusuma, Ilham; udin, Ikhwan; Yudaningrum, Farida
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 6, No 1 (2025)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v6i1.21093

Abstract

Abstrack. The Blorong River is a river in the Brangsong District, Kendal Regency, Central Java Province, which has the potential to be hit by flood disasters almost every year. So conditions like this can cause losses to communities around the Blorong River. Through the research carried out, the aim was to determine the maximum discharge of the Blorong river with a river length of ± 3.3 km. The calculations and analysis applied in this research use quantitative methods. The primary data taken is documentation of the existing conditions of the Blorong river, while the secondary data is rainfall data from Balai Pusdataru Bodri Kuto. Analysis of the planned flood discharge using the Nakayasu HSS method shows that the planned return period flood discharge is Q2 years = 236,500 m³/s, Q5 years = 276,392 m³/s, Q10 years = 296,294 m³/s and Q25 years = 300,180 m³/s. After comparing it with the results of manual calculations of the existing conditions of the Blorong River using the Manning formula. The solution to the problem of flooding from the Blorong river is to normalize the river, raise the embankment in the STA section which is no longer able to accommodate the planned flood discharge, and also provide regulations so that people do not throw rubbish in the river.Keywords: Flood Analysis, Flood Discharge, Blorong River
Analysis of The Effect of Change Orders on Implementation Time and Construction Labor Costs in The Development Project of The Joint Lecture Building III at Unimus Rinaldi, Bramantyo; Suwandi, Putri Anggi Permata; Kristiawan, Agung
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 6, No 1 (2025)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v6i1.21537

Abstract

Change orders resulted in a total time deviation of 45 days (18.75%) from the initial plan, with the most substantial delays in structural and MEP work. Regarding labor costs, MEP work experienced the largest deviation at 25% (IDR 150,000,000), followed by foundation work (16.67%), structural work (15%), and architectural work (10%). Change orders also impacted labor productivity, particularly in MEP work (-25%), followed by foundation (-16%), structural (-12.5%), and architectural work (-12.5%). These productivity decreases resulted from changes in work methods, increased complexity, and adaptation requirements to new specifications. The study recommends several measures to minimize change order impacts: more thorough design reviews before implementation, allocation of time and cost buffers, improved documentation and approval systems, and more flexible workforce planning. Effective change order management is crucial for maintaining overall project success.
Analysis of Impact Contract Change Order (CCO) on Time & Cost (Case Study : Counterweight and Tano Ponggol’s Channel Project in Samosir Regency) LARASATI, ENDAH; SHOLIKIN, YUDHA ALFANDA MUHAMMAD; KRISTIAWAN, AGUNG
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 6, No 1 (2025)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v6i1.22423

Abstract

In many projects, changes often occur due to on-site conditions. These changes are made to ensure that the work can be carried out properly and in accordance with actual field requirements. Typically, such changes—whether additions, reductions, or replacements—lead to modifications in the contract documents. These modifications result in a Contract Change Order (CCO), which can affect several aspects of the project.This study aims to analyze the impact of Contract Change Orders (CCOs) on project duration and cost, using the Counterweight and Tano Ponggol Channel Project in Samosir Regency as a case study. The results of the study indicate an increase in project duration by 175 days. In terms of cost, the CCO led to a reduction in the counterweight work budget from IDR 25,018,491,000 to IDR 18,768,883,000.

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