Turn time remaining

[Currahee]

Not exactly. It means that if everything goes right, you might wind up with 30% of the turn left....but no more than that. But other things can cause you to use more than you've plotted; dug in enemy, enemy on "ignore losses"; etc. Although now, in TOAW III, the scenarion designer can limit turn burn, if he sets the scenario up front: see this extract from the "what's new" file in the Manual folder that comes with the game:

"18. Max Rounds Per Combat feature implemented as a scenario design option, which can dramatically reduce the turn burn from earlier versions of TOAW."

So, in your example, if the designer had limited turn burn to one pulse, you would have finished the turn with at least 20% left.

In France 40 Mod B, which I recently re-worked, I've limited the turn burn to three combat pulses. You can still "force" it to use more that than, ie, if you use a unit that's already burned up more of its turn, or plot artillery fire from an HQ or artillery unit that has "zero" movement left; but in the normal case, where you've been careful, it'll limit turn burn to three pulses (30%).