Originally Posted by lbbzman

To the best of my knowledge, there's no indication when a schedule change has happened. So every once in a while, you may want to check that your saved alerts still match the current schedule. I believe EF will still show the alerts as "Active" even though they no longer correspond to a valid flight.

There is also usually a spike in activity in this thread on the AA forum when AA runs a schedule change.

I should have clarified that my earlier response is specific to AA. I have less experience with AS and am not familiar with their award release (or schedule change) strategies.