I don't think comparing trailing cash burn to ARR (which is a...

I don't think comparing trailing cash burn to ARR (which is a forward looking metric) is appropriate. ARR is barely comparable to ttm revenue, especially for LVT as they grow quickly and have large contracts which aren't paid immediately. It will make your numbers for profit look better than they really are.

Because cash burn and revenue are both changing so much each quarter, I'd either take two quarters (so you get a slow and a good quarter) or ttm being aware that it lags taking a larger sample.