Abstract:Based on project-time controlling and risk management theory, a time-risk controlling model has been proposed to solve the problem of high uncertainty in the early stage of mega construction project (MCP) from the consulting achievements for several airport megaprojects. Next, the model was applied to develop pre-stage schedules and risk lists for XY airport megaproject. Finally, the effectiveness of controlling method was proved by comparing the overall time-risks of XY airport and other two airport pre-schedules, and comparing the effect before and after implementation of the customized plan. The risk-based method improves the applicability of project time-controlling at the front-end, and provides a methodological guidance for early time control of MCPs.