3. Areas of use

3.1 Schematic diagram

Also known as an explanatory diagram, it shows the main components and important connections. It's a first approach that limits itself to the essentials. When it is intended to explain how a system works, it is called a "functional diagram". The presentation may comprise several diagrams of increasing complexity.

Figure 2 shows a schematic diagram of the distillation process. Fluid movement is indicated by arrows. It could serve...