Decision-making is crucial in organizations. This chapter explores different types of decisions, how individuals and groups make decisions, decision-making processes and models, strategic decision-making, and effective managerial decision-making. It also discusses tools and techniques for group decision-making. In LSOPM operations, better decision-making leads to increased productivity. Research shows a strong link between swift decision-making and productivity. A model outlines 11 factors that contribute to swift decision-making and productivity.