In arbitration hearings, the arbitrator usually follows a standard agenda that sets forth the order of the proceedings. Occasionally, an advocate may argue about the order, requesting that the other party should present their case first. In one case concerning an employment termination situation, the Management advocate insisted that the Union should present their case first

describe the proper order for this hearing and discussing the decision the arbitrator should make regarding the situation.

https://law.missouri.edu/arbitrationinfo/

https://law.missouri.edu/arbitrationinfo/about/