This article examines how De Wit's process approach (De Wit, 2002) describes internationalization and impacts its effectiveness, through a case study research at a comprehensive public university in the U.S. It aims to explore how a higher education institution may plan for internationalization, implement its plan, review how the implementation conforms to the plan, and act on what has been learned. This study examines the relationship between internationalization planning and assessing internationalization outcomes. It responds to the call for accountability, the call for quality assurance, and the urgent need for higher education internationalization. Most importantly, this study addresses the research gap in the area of internationalization assessment--exploring how De Wit's process approach can be utilized to help higher education institutions strategically plan internationalization to effectively impact teaching, learning, research, and service.