This document discusses different models of leadership and contingency theory. It defines leadership as the process by which a person exerts influence and inspires others to achieve goals. Contingency models recognize that effective leadership depends on the characteristics of the leader and the situation. Three contingency models are described: Fiedler's model ties leadership effectiveness to task orientation and relationships; House's path-goal theory focuses on motivating subordinates; and the leader substitutes model suggests leadership is sometimes unnecessary when substitutes are present like empowered subordinates or clear contextual rules. Taken together, the models provide a multidimensional view of effective leadership contingent on various factors.