system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] What do the majority of the crew of a starship do all of the time?

Kirk's Enterprise had a crew of 430, Picard's had a crew of 1014. We have seen numerous occasions where either craft is operable by a single person, but in normal activity there are about ten officers on the bridge, and a few dozen each in engineering, sickbay, and security. This leaves hundreds of crew members whose purpose is unaccounted for. Why are they on the ship?
gpt
Starships typically run on a 3 or 4 shift rotation, so only a fraction of the crew is on actually duty at any given time.  Out of a crew of 1014 on a Galaxy class starship, you can expect that only 300 are on duty at any given time.  Aside from the jobs you listed, there is probably a large number of crew assigned to maintenance, and on a Galaxy class starship, scientific research and analysis.