Supply Chain Integration for Collaborative Innovation Projects: Unraveling the Role of Project Complexity and Project Management Methods

ABSTRACT Supply chain integration (SCI) is crucial for the success of innovation projects led by focal firms in collaboration with customers and suppliers. However, prior research offers limited insights into how SCI configurations may vary according to project characteristics and project management (PM) methods. As alternatives to the traditional stage‐gate PM approach have emerged, SCI has become increasingly complex. Drawing on project complexity theory, we seek to understand how different SCI configurations and PM methods intersect in 15 cases of collaborative innovation projects across 11 multinational firms. Our findings reveal that projects with varying levels of supply, customization, and technological complexity require distinct arcs of integration, paired with appropriate PM methods. The implementation of these strategies hinges on the PM capabilities of the focal firm and its supply chain partners. This study contributes to the SCI literature by theorizing how different sources of project complexity shape choices regarding PM methods and the arcs of integration that focal firms adopt.