This document discusses decision-making processes and models. It describes how decision-making has become more complex, rapid, and uncertain due to factors like reengineering and mergers. As a result, new decision-making approaches have emerged that rely less on rational and analytical models. These new approaches involve coalition building, bargaining, and trial-and-error. The document outlines several decision-making models, including the rational model, Carnegie model, incremental model, and garbage can model. It provides guidance on which models to use based on whether the problem and solution are certain or uncertain.