How often should we run the Employee/Supervisor Relationship Build report_R05846?

It's my understanding from past conversations with consultants that we should only have to run this report once and that all changes going forward would update the tables.  But now that the Org Chart functionality has changed, I find that I have to run it all the time to get the data populated for the managers to see updated data.

Is this something that I could put on a nightly job scheduler?

Scott