Combining the design–build and fast-tracking delivery methods, this study aimed to reengineering the fast-tracking processes across both organizations of designer and constructor, so that fast-tracking processes in the design–build team can span across organizational boundaries and are composed of cooperating workflows executed in different organizations. For this purpose, two subjects are described in this study, namely, (1) fast-tracking model creation, and (2) cross-organizational process reengineering. Consequently, this research addressed a mechanism to facilitate the flexibility of cross-organizational process integration, which may assess alliance of design and construction companies for one design–build project.