The course Quantitative Methods and Decision Biases introduces fundamental and advanced quantitative tools for decision analysis, including applied statistics, regression analysis, optimization, simulation, and risk assessment. At the same time, it provides knowledge of behavioral aspects of managerial decision-making, focusing on common heuristics and biases such as availability, representativeness, overconfidence, loss aversion, and groupthink. By integrating quantitative methods with behavioral insights, students will develop the ability to make data-driven decisions while recognizing and mitigating cognitive biases, thereby improving the effectiveness and quality of decision-making in modern business and management contexts.