Managerial decision making involves choosing between alternatives in uncertain and changing conditions with unclear information and conflicting views. There are three main models of decision making - the classical, administrative, and political models. The classical model assumes rational decision making based on complete information. The administrative model recognizes limits to rationality and satisficing. The political model views decisions as outcomes of negotiation between competing interests. Effective decision making involves recognizing the need, developing alternatives, selecting an option, implementing it, and providing feedback.