[otrs] Assign queue and agent

Hi all, I have some questions about the OTRS structure. My structure is, all the user will send the tickets at same place. The administrator. After, the administrator will asign the incident, depending the type, to maintenance1, maintenance 2 or maintenance 3. The participant people should receive emails informing all the tickets changes. I try to do that, using diferents queues for each maintenance. Because if i just use a 1 queue, manitenance1, can see the tickets from others maintenance. But, for asign, one ticket, i have to change the queue and owner. How i can do it? Thanks very much