If I have such situation that current quest cannot be performed because of all agents are tired or existing agents not able to perform current quest. I skip all incoming quest(s) until new agent(s) are come in organization (or existing agents up their experience to able to perform skipped quest(s)). Then I try to assign new agent(s) to perform skipped quest(s).
Question: can I face with such situation or it is guaranteed that all quests can be performed in the same order they are appear in input (maybe with some lag of course)?

P.S.
And what about if new agent(s) not come in organization but quests still pending at end of input? (maybe this situation is not present in tests)