When I first saw this report coupled with the fact that it can be targeted at any object, which could be a SQL DB Engine, a web site or a distributed application I thought that this is great and just what customers are looking for.
Unfortunately when you run it and examine it it is just a timeline showing the worst possible state of that object over time. If you have a critical alert for a couple of hours then that part of the availability graph will be red even if the alert does not affect availability. Very disappointing. Don’t oversell this to management.