I queried if critical damage cards (like power failure) stack, or just work off the single value on the ship card. Also, if it did stack, did rounding occur at each step, or at the end?
From James Kniffen via email:
The Power failure damage cards are applied sequentially. If your engineering value was 5, it is reduced to 2 (5 to 2.5, rounded down to 2), then reduced to 1 (half of 2)