For change management, regularly running IP Fabric discovery is necessary. A periodic discovery run can be scheduled at Settings → Advanced → Snapshots → Timed Snapshots.
Here is an example for an automatic discovery run at 10 minutes past every hour (0:10; 1:10; 2:10; 3:10, etc.).
How scheduling work in IPF:
Let's assume that snapshot is scheduled for every hour and snapshot takes 4h:20min to be created, then the next snapshot will be scheduled once the previous snapshot finishes. The scheduled time will be set at the next possible period according to the cron setup.