Some of the most common questions people ask themselves, can be solved quite easily, by using the Auditing universe by Business Objects themselves.
How long does a report take on average to refresh?
In which reports do we use a certain objects?
Maybe, when a report fails to refresh, you want to know about it?
Maybe, when a report runs a LOT faster than usual, you want to know about it?(because chances are, the report will be empty then)
That's when you use the Activity Universe.
The Activity Universe exists in every Business Objects Environment, but you need to have auditing switched on. Many environments do have this.
Ask about it to your local Business Objects Administrator :)