If you’ve been considering the best way to upgrade your E-Business Suite Release 11i environment to Release 12, I strongly recommend that you check out Eugene Weinstein and Nigel Cooper’s excellent OpenWorld 2007 presentation:

Supported R12 Upgrade Paths: Supported upgrade paths from E-Business Suite (Applications) 11.0, 11.5.1 to 11.5.10 to Release 12


Eugene and Nigel cover the following topics:
  • Overview of the R12 Upgrade process
    • The R12 filesystem
    • Supported upgrade paths
    • Technology improvements
    • The R12 upgrade flow
    • Options for omitting the upgrade of historical data (Upgrade by Request)
  • Best practices for the upgrade
    • Staffing & planning
    • Pre-upgrade, upgrade, and post-upgrade tips
Perhaps most significantly, Eugene and Nigel discuss Oracle’s own experiences in upgrading our 10 TB Global Single Instance from Apps 11i to 12.  Upgrading an Apps database with over 28.5 billion rows of data is a serious undertaking, and it’s always instructive to see how the best Apps IT organization in the world does things. 

Highly recommended reading, even if you’ve already performed one or more test upgrades already.

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