I would like to generate some sort of report that shows devices sorted by uptime or downtime ratio.

I noticed that The Dude collects (counts) downtime in [Service.TimeDown] and this can be referenced in email alerts, for example. It also counts [Service.TimeUp].

When the probe (service) is ping, these are good indicators of overall device availability. However, I cannot find a way to use these variables to produce the information I need.

Basically, I want to be able to do this for each device:
Service.TimeUp / (Service.TimeUp + Service.TimeDown)
and sort devices by these values, ascending

I can't even find a way to do this basic math in the email alerts where it lets me reference these variables. Anyone have any ideas? Thanks!

how did u solved it?

One of the idea was to create a Feature request - Sending Reports, but it is slightly different case.