Managing Cost and Schedule Risks in High-Rise Building Projects: A Case Study from Jakarta, Indonesia

Building construction projects are inherently complex and exposed to various risks that may significantly affect project performance, particularly in terms of cost and time. This study investigates risk management practices from the perspective of the contractor on the XY Building Construction Project in Jakarta, Indonesia. A qualitative descriptive methodology was employed, involving literature review, expert interviews, and structured questionnaires to identify potential risks. Risk analysis was conducted using the Probability Impact Matrix (PIM) method, where 32 risk factors were identified and validated by experienced professionals. From the analysis, five dominant risks were categorized as high-priority, including, target production shortfalls, delays in external approvals, late material deliveries, inefficient management coordination, and limited access for heavy equipment. Appropriate mitigation strategies were formulated based on expert responses, including improved onsite management, vendor diversification, and traffic coordination for equipment access. These strategies aim to minimize the impact of critical risks and enhance project delivery efficiency. The findings contribute to a better understanding of risk prioritization and practical response planning in high-risk building construction environments.