We are in the process of migrating our BI server.
It is handy to know what is being used and what is not.
We will have to change many application config files to achive the migration. With this, we can track down all the reports that are still in use.
Because some of the reports are older than our current team, we are able to identify reports that need a little more attention.
Running this, I found serveral reports that maybe running on bad queries or possibly returning too much data.
Just run this against your ReportServer database.