Usually arbitration involves contacting the two parties involved individually, then sitting them down together with a mediator to talk to each other. [Like a couple of god damn adults who don't use firearms to solve their problems, Gregor charitably does not add.] If the people involved can't come to an accord after that, measures to keep them separated to their mutual satisfaction are implemented. We haven't had to do a lot of it on this ship, yet, but that's the ideal. We don't necessarily get to pick our crewmembers, but we have a limited amount of space on this ship, and we all have to share it.