If your class is over one hour in length or particularly challenging, you will have a team of interpreters. Both interpreters are constantly active in the team process. Primary roles are directed to the consumers and include tasks such as signing and voicing. Support roles are necessary to enhance the team's performance and include regulating the overall setting, assuring appropriate, timely transitions, and monitoring the primary interpreter. In team interpreting, interpreters rotate at regular intervals, usually every 20 to 30 minutes, while providing continuity in the message transmission.
Rotation greatly reduces mental and physical fatigue by allowing a shift of tasks.