Instead of working the functional system in isolation, with E3.function design everything you do at this stage will pass through to later stages in the design process and integrate with the harness design.
The functional schematic contains functional units and provides a quick overview of a product's behavior for internal and external communication purposes.
From Functional Units to Physical Components
As the overall design progresses, functional units are converted into physical components. These components contain all pin-out details and signal logic information defined previously, enabling the physical wiring.