Viet Thanh Nguyen, Sy Tien
The assembly and installation phases of Modular Integrated Construction (MiC) involve closely sequenced and interdependent activities in which disruptions can rapidly affect project performance, yet these phases remain underexamined. This study develops a risk profile for MiC during these stages. Using a structured process combining literature review, expert validation, and interviews with twelve professionals, thirty-five risk factors relevant to MiC installation in Vietnam were consolidated, including eleven newly identified risks reflecting context-specific challenges. Each risk factor is mapped to its underlying sources, its influence on time, cost, and quality, and its severity assessed using a probability–impact approach. The results indicate that many high-level risks are associated with communication and coordination deficiencies, weaknesses in monitoring and management, plan- and process-related sources, equipment-related sources, and change- and information-related sources. Weather disruptions, crane malfunctions, contractor inexperience, modular connection errors, and approval-related delays were among the most severe risks. To support systematic risk management, the study proposes an integrated coding structure that organizes risk sources, affected objectives, severity levels, and response measures. The resulting risk profile clarifies how risks emerge during MiC installation and provides a structured basis for consistent risk management. The findings offer an evidence-based reference for contractors, consultants, and project owners.