Oracle^® Business Intelligence Applications Upgrade Guide > Overview of Oracle BI Applications Upgrade >

Preupgrade Considerations

You should consider the following points before you begin your upgrade:

• Review the System Requirements and Supported Platforms for Oracle Business Intelligence Applications on Siebel SupportWeb to make sure your database platform versions are supported.
• The upgrade process is not only a technical process. You will also need to analyze the impact of the schema changes on your current custom implementation. The extent of your customizations will have an impact on the length of time required for the upgrade.

  In addition, at different stages of the upgrade you will also need to analyze your organization's business requirements. For example, at the stage in which you are upgrading the Oracle Business Intelligence repository, you will need to know which repository objects are not in use so that they can be trimmed from the repository. To determine this information, you will need to know what reports are in use.

• You should determine what customizations were made to your existing DAC repository before you begin the upgrade process. Moving the customizations in your existing DAC repository into the new DAC repository is a manual process.
• For each stage of the upgrade process, you need to allocate a reasonable amount of time to validate the results of that stage and address any problems. In addition, final user acceptance testing must confirm that the entire upgrade process was successful.
• When you upgrade the Siebel Analytics Web Catalog to the Oracle BI Presentation Catalog, it is highly recommended that you use side-by-side environments and have users review and compare reports and dashboard content between the previous version and the upgraded version.

  For the other stages of the upgrade, you can upgrade your environments in place. However, for comparison and benchmarking purposes, it is recommended that you upgrade using side-by-side environments.

• When you move from a development environment to test or production environments, you must perform the following stages of the upgrade process for each environment:
  • Upgrade the Platform
  • Upgrade the Applications
  • Migrate Data

    You can migrate the DAC, Informatica, and Oracle BI repositories into the production environment after you merge and test them.

    For a description of the major stages of the upgrade process, see Major Stages of Oracle BI Applications Upgrade.