This document discusses three decision-making models: the classical model, administrative model, and political model. It also describes four decision styles: directive style, analytical style, conceptual style, and behavioral style. The classical model involves clear goals, certainty, and rational choice. The administrative model has vague goals, uncertainty, and satisficing choices. The political model has pluralistic goals, ambiguity, and bargaining. The four decision styles differ in how problems are perceived and solutions chosen. The directive style prefers quick, simple solutions. The analytical style carefully considers alternatives based on data. The conceptual style considers many broad alternatives and social information. The behavioral style focuses on understanding others and helping them achieve goals.