Process understanding is highly important in the field of industrial engineering and management. Without knowing processes, there is no opportunity to improve them. In the course Process Modelling and Simulation, various concepts of process modelling will be introduced as well as modelling methods and modelling languages. One method of process modelling will be treated in details to demonstrate how process modelling can support industrial engineers to implement optimization initiatives. Various exercises and simulation examples will be practiced both in class and as homework with real process modelling and simulation tools (e.g., Vensim, PlantDesign, ARIS Express, Plant Simulation).