What happens when I refresh the Site Validation list?

One Model has a set of rules for each of the Site Validation components that we test your instance against. For example, for Storyboards, there are 6 rules as shown in the screenshot below. After each site refresh, or if you click on the refresh button on the site validation page, those rules are tested against every tile on every storyboard. 

For Data Warehouse Relationships, there are 10 rules, and so on. 

If you calculate how many tiles your instance has across all storyboards, and/or how many joins exist in the entity / data warehouse relationships, you’ll see why your site validation list may take a minute or two to refresh. 

Please refer to the Site Validation Guide for more information, or contact Customer Support if you have any questions regarding your Site Validation messages.