Wis. Stat. § 111.87: Mediation.

The commission may appoint any competent, impartial, disinterested person to act as mediator in any labor dispute either upon its own initiative or upon the request of one of the parties to the dispute. It is the function of such mediator to bring the parties together voluntarily under such favorable auspices as will tend to effectuate settlement of the dispute, but neither the mediator nor the commission shall have any power of compulsion in mediation proceedings.