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ANALYSIS OF REMAINING CONSTRUCTION MATERIALS AND THEIR CAUSAL FACTORS IN BUILDING PROJECT Candra Yuliana; Elma Sofia; Gawit Hidayat; Munawarah
Jurnal Infrastruktur Vol. 10 No. 1 (2024): Jurnal Infrastruktur
Publisher : Jurnal Infrastruktur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/infrastruktur.v10i1.6328

Abstract

The problem that occurred in the ABC Flats Construction Project in Banjarbaru was that the project land was quite narrow. So if there is a large scale accumulation of material waste and lack of material management it can result in delays in the construction process, especially the mobilization and demobilization of tools. The aim of this research is to determine materials that cause large waste costs and the factors that cause them, as well as possible strategies to minimize waste. The analysis method is carried out using Pareto, waste cost and fishbone analysis. Collecting data by means of observation and interviews or brainstorming on several similar projects. The results of the Pareto analysis (80/20) show that there are two materials that contribute large costs, namely iron and concrete. The material that has the potential to generate large waste costs in the ABC Kalimantan Flats Construction Project as of the 21st week is ready mix concrete. The contribution of waste value per square meter is 0.073 m3 with a waste cost of 0.003% of the contract value. Based on the fishbone analysis, it was found thst the factors causing waste are a narrow location, stacking of moving materials, workers placing material carelessly, length of reinforcement that is not uniform, simplification of the shape of the pile cap structure, use of tools that do not match their function, number of orders that do not match, the rest of the concrete in the mixer, workers fatigue. Strategies to minimize waste of iron-concrete and ready-mix concrete materials are providing guidance to blacksmiths and workers, making access to tool distribution, using tools according to their functions, utilizing residual concrete, analyzing linear programs or barbending schedules. These results become considerations and suggestions in reducing the project budget due to the impact of material waste.
House of Risk (HOR): Analisis Risiko Aspek Waktu Pelaksanaan Bangunan Gedung di Lingkungan Lahan Basah Kalimantan Selatan Candra Yuliana; Retna Hapsari Kartadipura; Endah Widiastuti; Gawit Hidayat
Jurnal Aplikasi Teknik Sipil Vol. 23 No. 4 (2025)
Publisher : Pusat Publikasi Ilmiah LPPM Institut Teknologi Sepuluh Nopember

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

Abstract

Risks during project implementation are often related to lack of resources, design changes, which can result in work delays and increased costs. The aim of the research is to examine risks with a large impact in causing delays and effective ways to reduce them on construction projects in the Banjarbaru and Banjarmasin areas. This research involves data collection using qualitative method research through questionnaires, which are then analyzed using the Severity Index method combined with the Probability-Impact Matrix and House of Risk. The results of the identification of 5 dominant risks, namely quality checks at the same time as work implementation, staff organization, limited funds, inappropriate or uncomfortable PPE used during implementation, workers being too confident that they will not get hurt. Recommendations for dealing with project delays that can be achieved through setting appropriate specifications, evaluating the level of labor productivity and budget changes, checking quality according to standards, socializing the dangers of project accidents, monitoring in accident management, updating material and labor estimates, providing PPE.