Decision making is a central aspect of virtually every management and business activity; important decisions are not only made by managers and entrepreneurs, but also by the consumers of their goods and services, and by their business rivals, partners and employees. The ability to understand how decisions are made, and to predict, guide and improve those decisions, will be an invaluable part of every manager's toolbox. It is this ability that will be developed in this course. Some decisions are impossible to make analytically, for lack of time, data, computational ability, or awareness. These are situations that could put decision makers at risk of falling into systematic biases and errors. The first part of this course will raise your awareness about these 'traps' with a view to becoming a better intuitive decision maker. Other decisions are made with and require extensive thought and analysis, as the stakes are high, there are multiple conflicting objectives to balance, and many sources of uncertainty about the future. To these decisions we will devote the second half of the course, where you will learn how to structure decision problems, identify relevant objectives and make trade-offs among them when objectives are in conflict with one another, as well as, represent and analyse the main uncertainties and risks involved in a decision.