The document provides guidance for upgrading Oracle E-Business Suite from Release 12.0 and 12.1 to Release 12.2. It discusses supported upgrade paths, database upgrade requirements, the overall upgrade process, obsolete products, system requirements, and planning tasks. Upgrading involves both technical and functional tasks across various product areas that must be coordinated between the DBA and application specialists. Careful planning is required to schedule downtime and complete all necessary pre- and post-upgrade activities.