Lanefan
Victoria Rules
That's an in-fiction deadline, which makes lots of sense.I don't know anyone who doesn't understand the usage, I was responding to @Faolyn who insisted that it's always player facing.
I typically use something that can be observed by the characters such as a sunset on the winter solstice.
Again, though, an in-fiction thing rather than a meta-counter. You've determined it's going to take the building 7 rounds to collapse which means, though the PCs don't realize it, they've got 6 rounds to get out of there safely.But occasionally there will be a ticking clock where the players know there is time pressure but don't know specific details. Escaping a collapsing building would be an example, they know the building is collapsing they don't know exactly how long it will take.
Looks like you use the term and concept the same way I do.