When falling behind on something, it has to do with not catching up, or staying on pace, with the expected timeline. It could be there being too much work to do, or not having enough time to do it, or not having the resources or know-how to do it. But not staying on pace can be indicative that some things can’t be rushed, since quality matters more than quantity in certain cases.
Of course, some projects/assignments are time-dependent, because they’re based on a fixed/rigid schedule, or the sheer volume of tasks that have to be completed. But other things, like works of art, stories, scientific research, etc., can require months or years to complete. Sure, it can be rushed to completion, but it wouldn’t be the same–and not to the same calibre–if it had progressed at the pace it needed to become more than just a box to check off.
Fallton Havenstonne 