Dr. Christenson determined that the current project critical success factors identified in the literature are necessary but not sufficient to explain all project success. He explored the construct of &#039;project vision&#039; as a critical success factor impacting project success. The findings of the multiple case studies strongly suggest that a project&#039;s &#039;vision&#039; is a critical success factor to successful project outcomes. As such, the projects examined represented a continuum of change projects from changes to business practices to holistic cultural change (where the desired end state was not fully known). The project vision was found to be instrumental in signalling change to all stakeholders. Similarly, the project vision was found to be critical in knowledge management projects where the purpose is to share new, best or next best practices. The research also shows that the maintenance of a project vision has significant impacts on the successful completion of the project, especially on its timeliness for completion due to enhanced decision making. A project vision needs to be a shared vision of all stakeholders and the project champion, sponsor, and manager all have a role in communicating and maintaining the project vision throughout the lifecycle of the project. A multiple case study method was conducted within a public service organization. The study&#039;s findings provide a significant contribution to the practice of project management