While there has been some considerable investment in information systems implementation and usage in the public sector, success has often been limited. Attempts by researchers to address this situation has been diverse and often inconclusive. A publication by the MIS Quarterly journal offers some direction. The study, which focused on information systems development (ISD), highlighted the need to explore how mutual understanding among key stakeholders is created, or the extent to which they have a shared conception of the ISD project, and further how such mutual understanding is changing, develops, or deteriorates over time. On the tenets of the study, this chapter attempts to chart a path for future research in interoperable financial management systems implementation and usage in the public sector. It presents a viewpoint that establishes the need to explore the creation and sustenance of mutual understanding between stakeholders in the implementation and usage of interoperable or integrated financial management systems in the public sector.