Bridging Legacy and PeopleSoft Applications: A Reference Architecture for Phased PeopleSoft ERP Implementation

This article proposes a scalable and structured enterprise reference architecture for integrating legacy enterprise solutions with Oracle PeopleSoft during the phased implementation of enterprise resource planning (ERP). The strategy is aimed at combating the threats of disruption in the public sector and higher education institutions, modernising the core processes. The framework focuses on the synchronization of data, interoperability, and the maintenance of performance on systems interacting with each other during the transition period. By putting in place a robust middleware layer, data synchronization levels, security measures, event-based triggers, active monitoring, and an effective change management strategy, the organization can successfully go live with PeopleSoft in phases without business interruption. Using practical experience of implementing the architecture in real-world usage in education institutions, the architecture also illustrates how phased adoption can work to allow organizations to retain critical legacy functionality as they transition to state-of-the-art capabilities, allowing organizations to mix and match new features with older functionality. Such balanced methods yields a substantial number of benefits, such as mitigation of risks, control of costs, better ability of stakeholders to adopt, and data integrity within the migration process, where it offers public sector organizations a feasible route to modernization without compromising their operational limitations and mandates.