This course is about understanding systems. System dynamics (SD) provides the tools to model and analyse the dynamic behaviour of a complex system. In this way the relationship between the system structure and behaviour can be understood. Proposed changes in structure can be simulated and good management strategies identified. The methodology of system dynamics will be covered and extensive use made of software designed specifically for SD modelling. The course will cover applications from a wide range of problems such as supply chains, staff fluctuations, handling student stress, and ecology.