Abstract: The Department of Veterans Affairs (VA) has dozens of systems to support appointment scheduling for veterans. It has acquired these systems over time to address needs, such as for online scheduling and virtual appointments. VA schedulers experience challenges navigating VA's complex systems environment, while veterans experience challenges with online scheduling. To address these, VA's Veteran Health Administration (VHA) and Office of Information and Technology (OIT) are collaborating to modernize systems. VA has partially met key practices in the areas of project scheduling and requirements management. Specifically, VA's project schedule substantially met two elements of a reliable schedule and partially met two others. For example, it does not include all IT work needed for the effort, which limits VA's ability to ensure VHA and OIT agree on what work needs to be completed and when.