In the episode, "Chain of Command", when Starfleet assigned Captain Edward Jellico to replace Captain Picard, was it intended as a permanent or temporary assignment? Did they assign him on a temporary basis, assuming Picard would be returning to the ship at the completion of his mission? Or did they envision Picard would not be returning, and intended Jellico as the permanent new captain of the Enterprise?
Given the nature of his assignment, there was a very strong possibility Picard would not be returning to the Enterprise. And given how Jellico came in and immediately started restructuring Picard's entire command routine, it would seem he was under the same impression that Picard was on a one-way mission. Starfleet probably gave Jellico the Enterprise with the intention of it being a permanent command.
I've gone into management situations as a temporary replacement, and in those cases, I try not to disrupt everyone's way of doing things because I'll be gone soon. I would only restructure if I thought it was a permanent position, and whether it was even necessary.