Understand Systems

This chapter introduces core ideas in systems theory. It explains the difference between natural and human-made systems and describes key traits including purpose, components, interdependence, boundaries, and environment. These traits are shown in real-world examples from healthcare, design, and everyday settings. The chapter also covers common system classifications, such as open and closed systems, simple and complex systems, and hierarchical structures. It explains how these categories support system mapping, modelling, and method selection. The role of the observer in defining system boundaries and purpose is highlighted, linking to constructivist perspectives. The chapter ends by showing how system types relate to practical tools used in systems thinking, systems practice, and complexity-informed approaches.]