Oracle EBS to Fusion Migration: Why Mid-Market Companies Are Underestimating the Business Complexity

Every Oracle EBS to Fusion migration engagement we review has the same structural problem: it has been scoped as a technology project. The system integrator has sized the technical effort — data migration, integrations, customisation remediation — with reasonable accuracy. What is almost universally underestimated is the business transformation effort: the re-engineering of processes that were built around EBS's data model and will not simply transfer to Fusion's different architecture.

The five most underestimated risks. First: process re-engineering scope. EBS customisations often encode business logic that has never been documented anywhere. Migrating to Fusion requires surfacing, debating, and redesigning that logic. Second: chart of accounts redesign. Fusion's segment architecture is different from EBS.

For multi-entity organisations, this is a 6-12 month workstream on its own. Third: reporting redesign. OBIEE reports built for EBS do not translate to OTBI or Oracle Analytics Cloud without significant rework. Finance teams who rely on custom reports will lose productivity for months if this is not planned for.

Fourth: organisational change. Fusion's user experience is fundamentally different from EBS. Training is chronically under-resourced. Fifth: data quality. The migration forces organisations to confront data quality issues that have accumulated in EBS for years. Master data remediation is typically the longest-duration workstream on the critical path..