This module aims to develop your capabilities of addressing behavioural issues in an operational context. It goes beyond the typical focus on single decisions taken by an individual to decision making—possibly involving some strategic considerations—in what is called operations. Operations is an area of the management field focused on designing and controlling the processes involved with the production of goods or services. The study of operations can refer to the field of operational research or operations management. Known paradigms for the former include Multiple-Criteria Decision-Making and System Dynamics and for the latter Operations Management. In both cases, the module focuses on decisions under genuine uncertainty that cannot be meaningfully reduced to probability (risk). We cover novel and transparent tools that do not rely on probability, such as simple heuristics and simulations of system dynamics, and contrast them to traditional tools of optimisation in operational research and operations management.