Managing project success is an ongoing concern in both research and practice. The existing literature suggests theoretical frameworks for defining project success; however there is a lack of studies exploring how to apply these frameworks into a particular organisation. Additionally, there is a lack of practical processes for managing project success. Furthermore, the extant literature does not pay adequate attention to value assessment in public sector projects. This research addresses the aforementioned deficiencies through an exploratory case study with a public sector organisation in South Australia. A conceptual framework for defining project success and a practical model for managing project success across the lifecycle were developed and some preliminary validation provided within the context of this organisation. The present study offers both theoretical and practical contributions towards managing IT projects to deliver business value.