Evaluating the Effectiveness of Industrialized Building Systems (IBS) in Reducing Construction Waste in Kuching, Sarawak

Construction waste is rising due to population increase and urbanization in numerous nations. Since 1998, Malaysia's Construction Industry Development Board (CIDB) has promoted industrialized building system (IBS) adoption in local construction industries to reduce construction waste. The purposed of this study is to analyze the impacts of IBS in reducing construction waste in Kuching, Sarawak. There were five causes of construction waste were identified through an extensive literature review including of error in procurement method, frequent design changes, poor construction materials management, lack of supervision and incompetent site labors. However, if IBS system is used as the primary approach in the building business, these issues may be avoided. As a result, this research also emphasizes how the IBS system's effects on construction waste reduction. It was discovered that there were five impacts that have an influence on minimizing construction waste, including minimize the using of construction materials, reduction error during construction phase, improve site condition, reduction site workers and more durable. To identify the significant level of each variable, a questionnaire survey was carried out. Then, data would be analyses using Partial Least Square – Structural Equation Modeling method. As a result, all the five causes have a strong relationship with both reduction error during construction phase and improve site condition since these two variables show the highest score in PLS. Identifying the significance levels of waste production sources, as well as the influence IBS has on decreasing construction waste, would assist industry stakeholders in improving the efficiency of IBS in reducing construction waste.