An arbitral tribunal or arbitration tribunal, also arbitration commission, arbitration committee or arbitration council is a panel of unbiased adjudicators which is convened and sits to resolve a dispute by way of arbitration. The tribunal may consist of a "sole arbitrator", or there may be two or more arbitrators, which might include a chairman or an umpire. Members selected to serve on a arbitration panel are typically professionals with expertise in both law and in "friendly dispute resolution" (mediation). Some scholars have suggested that the ideal composition of an arbitration commission should include at least also one professional in the field of the disputed situation, in cases that involve questions of asset or damages valuation for instance an economist.