Development of Risk-Based Standardized WBS (Work Breakdown Structure) for Mechanical and Electrical Works of Coal-Fired Steam Power Plant Construction Project in Indonesia to Improve Time Performance

The construction of a Coal-Fired Steam Power Plant in Indonesia has a high urgency to be realized in a short period. However, many significant factors arise during mechanical and electrical works that cause delays. Therefore, contractors need to plan the project carefully by anticipating all possibilities to minimize potential delays. With WBS, delay risks can be identified in smaller elements up to the resources level to avoid project time overrun effectively. This study aims to develop a risk-based WBS standard to improve mechanical and electrical works' time performance in Coal-Fired Steam Power Plant Construction Projects. Data was collected using questionnaire surveys from contractors involved in Coal-Fired Steam Power Plant Construction Projects and analyzed using the Delphi method and qualitative risk analysis. The result of this study is a WBS standard for mechanical and electrical works of a Coal-Fired Steam Power Plant Construction Project that contains the scope of works up to 8 levels. This study also identifies 47 responses of the 13 highest risks which affect project time performance as input for riskbased standardized WBS development to prevent, reduce, or eliminate possible events that can delay the completion of the Construction Project.