My experience, however, is making me believe that the problem may be in the word itself.
Saying something is “done” always creates different expectations depending on who we’re talking to. And having to create a specific definition for a word means it will only be valid for the people who agree on it, and as long as they remember it.
The solution? Well, maybe we should simply be using a different word(s). For instance, my gut feeling is that “ready” could probably do a better job. The main reason is that it invites further questions (“ready for what?"), whereas done ceases the communication (“if it’s done, let’s move on.").