Have a backup plan!
It's hard to get out of a chapter about managing a system without discussing backing up and disaster recovery. Again, an entire chapter could be filled with content on this subject, but that would be beyond the scope and intent of this book. Let's first be aware that backing up the FMW (that is, Oracle Home) folder structure and the Oracle BI artifacts is a good thing. The frequency is up to each organization, but once a week at a minimum is a good recommendation. Back up these items daily for high-availability or critical environments. Each application delivered with the Oracle BI Suite has its own backup consideration. Although OBIEE and BI Publisher comprise the main Oracle Business Intelligence Enterprise Edition software (don't forget Essbase, RTD, and the other analytics tools such as Interactive Reporting, and so on), they have some common metadata elements and some which are sole references.
If an outage were to occur after your Oracle BI environment has been placed...
