Evaluation of Material Waste in the Renovation Project of the BJKW Building, East Java Province Using Pareto Method and Fishbone Diagram

Abstract

Material is one of the main resources in construction projects, serving as a fundamental component in building structures. Proper planning and supervision in material usage are essential to prevent waste and minimize material loss. A high level of material waste can have a significant negative impact, particularly on the financial aspects of a project, as a large portion of the budget is allocated to material procurement. If material waste is not well controlled, it can lead to budget overruns beyond the initial plan, thereby affecting the overall efficiency and success of the project. This research was conducted on the renovation project of the BJKW Building in East Java. The study focused on material waste occurring in structural and architectural works. The objective of the research is to identify the dominant material waste and determine the key contributing factors to that waste. This study employed a combination of two analytical methods: the Pareto method and the Fishbone Diagram. The Pareto method was used to identify the types of materials with the highest potential for financial loss due to waste. Meanwhile, the Fishbone Diagram was applied to analyze the root causes of material waste. The results of the study indicate that the material contributing the most to waste was plain reinforcing bar, with a total residual material cost of IDR 7,227,099.75. The main contributing factors to this dominant material waste were identified as people, environment, and method