The most recent research into decision-making suggests that the most effective leaders are the ones who are able to adapt their decision-making style over time as their roles and responsibilities change. Discover a proven, easily understandable way to assess decision-making style with the Decision Making Style Inventory. The Decision-Making Style Inventory is a validated and reliable 20-item Likert assessment that identifies an individual's decision-making style preference. The assessment measures four dimensions. Two structural styles--Systematic and Spontaneous, and two processing styles--Internal and External. In this Inventory the two dimensions are combined to find a preferred decision-making style: Systematic-Internal, Systematic-External, Spontaneous-Internal, and Spontaneous-Eternal, plotted on a four-quadrant chart. The Inventory is a powerful tool that can be used in numerous developmental situations such as formal leadership training, coaching, and even performance appraisals.