The term BASE DECISION MAKER can be summarized as a person who is responsible for making decisions based on the rules and regulations of a particular organization. The acronym UMP stands for 'UMPIRE, ' which is someone who makes impartial decisions in a dispute or competition. An UMPIRE is often seen in sports, where they are responsible for making sure that the rules of the game are followed and that the players are playing fairly. Umpires also have the authority to make decisions regarding penalties and other disciplinary actions.