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All Journal LOSARI: Jurnal Pengabdian Kepada Masyarakat Advance Sustainable Science, Engineering and Technology (ASSET)
Mawardi Amin
Mercu Buana University
Agriculture, Biological Sciences & Forestry Humanities Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Public Health Social Sciences Transportation Other

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Quantitative Modeling of Change Order Impacts on Cost and Time Overruns in Indonesian Toll Road Infrastructure Projects Hadi Sasmito; Mawardi Amin
Advance Sustainable Science Engineering and Technology Vol. 8 No. 3 (2026): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i3.2425

Abstract

Change Orders (COs) are a major challenge in toll road infrastructure projects, often causing cost and time overruns. This study aims to identify key CO drivers and quantify their impacts on project performance in Indonesian toll road projects. A mixed-methods approach was applied, involving qualitative interviews with 35 experts (project managers, consultants, contractors) and quantitative surveys from 75 respondents covering 20 projects implemented between 2015 and 2023. Data analysis employed descriptive statistics, multiple linear regression, correlation analysis, and hypothesis testing using SPSS. Results show that five significant factors, namely poor planning, technical design changes, discrepancies between plans and site conditions, delays in land acquisition, and inadequate stakeholder coordination, explain 94.5% of CO variation (R² = 0.945). COs accounted for 94.9% of cost overrun variation (R² = 0.949) and 93.6% of time overrun variation (R² = 0.936). Design changes most strongly affected cost overruns (β = 0.419), while land acquisition delays had the greatest effect on time overruns (β = 0.537). COs have interrelated effects on cost and time, requiring integrated management from initiation to closure. The findings provide engineering and policy implications for precise contract documentation, rigorous planning, and proactive risk management to mitigate CO-induced overruns.
Analysis of Claims and Dispute Resolution in Construction Projects: a Case Study Approach Angga Ari Adi Pratama; Mawardi Amin
Advance Sustainable Science Engineering and Technology Vol. 8 No. 3 (2026): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i3.2460

Abstract

Disputes in construction projects are often inevitable due to various factors such as delays, cost overruns, and changes in scope. This study aims to identify the root causes of claims and examine the resolution strategies implemented in the Sierra Intercultural School construction project. Using a qualitative descriptive approach, data were collected through in-depth interviews with contractors, consultants, and owners, as well as analysis of supporting documents such as contracts and site reports. The study found that the most frequent claim types were time extension claims (37%), additional cost claims (28%), and design change claims (21%). These were primarily caused by design errors, late approvals, and incomplete work planning. Dispute resolution predominantly relied on negotiation and direct discussion, without involving formal legal or arbitration procedures. The findings indicate that effective contract documentation and proactive communication among stakeholders can significantly reduce claim occurrence. This research contributes to the field of construction management by offering practical insights into dispute avoidance and resolution mechanisms in medium-scale educational infrastructure projects. It also highlights the importance of early stakeholder alignment to prevent claims and delays in similar future developments.
Optimizing Cost Performance in Green Industrial Palm Oil Projects Using AI-Based AEC Ferry Pahlevi Wijaya; Mawardi Amin
Advance Sustainable Science Engineering and Technology Vol. 8 No. 1 (2026): November - January
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i1.2353

Abstract

This study investigates green industrial palm oil project cost performance determinants through Artificial Intelligence (AI)-based Architecture, Engineering, and Construction (AEC) systems. The study employed a Structural Equation Modeling Partial Least Squares (SEM-PLS) approach to analyze significant data collected from 115 respondents through 166 validated indicators. Ten primary drivers were identified, and alternative water sources topped the list, followed by indoor air quality auditing, green material, and smart metering systems, all of which were identified as primary cost-effectiveness drivers. Simulations of Green Mark certification levels (Gold, Gold Plus, and Platinum) indicated potential cost savings of 7.01% to 7.05%. The model continued to have very good predictive capability with an R² value of 0.791, testifying to the robustness of the methodology presented. The results validate the engineering value of AI-aided AEC in cost performance maximization and enhancement in eco-friendly industrial building. The findings also offer practical suggestions for design, planning, and execution of cost-saving, eco-friendly palm oil mills.
Improving Traffic Safety and Fire Safety Literacy of Students at Tadika Pertiwi High School in Depok Through an International Partnership Program with UTHM Malaysia Muhammad Isradi; Mawardi Amin; joewono prasetijo; Hendy Yusman Firdaus; Kukuh Mahi Sudrajat; Yunita Dian Suwandari; Agus Suroso; Elhazri Hasdian; Adi Nurmahdi; Hendri Nurmahdi; Andri Irfan Rifai; Syafwandi
LOSARI: Jurnal Pengabdian Kepada Masyarakat Vol. 8 No. 2 (2026): Agustus 2026
Publisher : LOSARI DIGITAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53860/losari.v8i2.667

Abstract

Low safety literacy rates in students are a serious problem, in addition, the threat of fire also looms over school environments and residential areas. Tadika Pertiwi High School, located at Jl. H. Jaeran No. 1, Cinere, Depok, needs to improve students’ ability to address these two risks. This initiative aims to enhance students’ understanding of traffic safety and fire safety, as well as to strengthen international partnerships with UTHM in Malaysia. The method used for traffic safety and fire safety awareness activities involved conveying traffic safety and fire safety messages to students. The outcomes of these activities include students gaining knowledge and adopting safe driving behaviors, as well as learning about driving safety, the importance of obeying speed limits and traffic regulations, and procedures for fire mitigation. The results of the activity showed that students' understanding of traffic safety increased 52% and fire safety increased 51%.
Co-Authors Adi Nurmahdi Agus Suroso Andri Irfan Rifai Angga Ari Adi Pratama Elhazri Hasdian Ferry Pahlevi Wijaya Hadi Sasmito Hendri Nurmahdi Hendy Yusman Firdaus joewono prasetijo Kukuh Mahi Sudrajat Muhammad Isradi Syafwandi Yunita Dian Suwandari