Sold Out Monitoring

Hey ticketing experts,

We have timed admission and I am hoping that another org with timed admission can help me. What is the best way that you monitor your ticket sales to see when/if you sell out for certain times and dates. We have admission all day with tours (right now we are using packages), but we have not set up a system to monitor when these sell out so that we can determine if we can open more tours. 

If you monitor this, how do you do it? What report do you use or do you use a dashboard. 

Thanks for any info you can share! 

x-posted in MZA group.