Oracle E-Business Suite migrations to the cloud should be straightforward. The technology is mature, the tooling exists, and Oracle has published detailed runbooks. Yet project after project runs over budget and behind schedule — not because of technical limitations, but because of avoidable planning mistakes. After guiding organizations through dozens of EBS migrations, we have distilled the most common failure patterns into five categories.
1. Skipping the Application Dependency Audit
EBS environments rarely exist in isolation. They connect to middleware, reporting tools, custom integrations, and third-party applications through a web of interfaces that are often undocumented. Teams that begin migration without a comprehensive dependency map inevitably discover critical integrations mid-flight, forcing expensive rework. Before touching a single server, invest in a thorough discovery phase that catalogs every inbound and outbound data flow.
2. Underestimating Customization Complexity
Most EBS environments carry years of customizations — custom forms, reports, workflows, and PL/SQL extensions. Migrating these without a rationalization exercise means carrying technical debt into the cloud. The smarter approach is to classify every customization as retire, refactor, or retain, and make deliberate decisions about each before migration begins. This discipline typically eliminates 20-30% of customizations that are no longer needed.
3. Treating It as a Pure Infrastructure Move
Lifting EBS to OCI is not just a VM migration. Teams that treat it as a pure infrastructure exercise miss opportunities to optimize database configurations, right-size compute resources, and implement cloud-native backup and disaster recovery patterns. The result is a cloud deployment that costs more and performs worse than the on-premise environment it replaced. Every migration should include an optimization pass that leverages OCI-native capabilities.
4. Neglecting Change Management
Technical teams focus on servers and databases, but the users who depend on EBS daily need preparation too. Changes in network latency, authentication flows, and support procedures all affect the end-user experience. Organizations that invest in communication plans, training sessions, and hypercare periods see dramatically smoother transitions and faster user adoption.
5. Going It Alone Without Oracle Cloud Expertise
General-purpose cloud consultancies understand infrastructure, but EBS-to-OCI migration demands specialized knowledge of Oracle licensing, database architecture, and application-tier configuration. Engaging a partner with deep Oracle Cloud experience — and a track record of successful EBS migrations — is the single most impactful decision you can make to reduce risk and accelerate time-to-value.