This document discusses models of shared decision making and participative leadership. It addresses four critical questions about when and how to involve subordinates in the decision making process. It presents the Vroom model and Hoy-Tarter model which examine the conditions that influence how effective subordinate participation will be. These include whether the decision is within the subordinates' zone of acceptance and expertise and interest. The document also outlines different decision making groups, roles leaders can take, and a normative model for determining the appropriate level of participation based on the situation.