This chapter looks at a model-based approach to Process modelling, which, although at first appearances, may seem quite simple; it will be shown that the application of modelling processes has myriad uses in systems engineering. The basic 'seven views' approach that is described in this chapter may be applied to many other areas of systems engineering, such as modelling standards, compliance, life cycle modelling, competence modelling, and project management. The definition of the 'seven views' follows the basic 'Ontology, Framework and Views' approach, which is used throughout this book.