CAD systems are software tools that allow engineers to create, modify, analyze, and optimize digital representations of physical objects, either in two dimensions (2D) for documentation or three dimensions (3D) for modeling.

The primary value of CAD lies in its ability to ensure precision, repeatability, and efficiency. It replaces traditional manual drafting, significantly speeding up the design cycle and allowing for vital simulation and clash detection before any physical prototyping begins.

CAD is the indispensable starting point for modern manufacturing, linking directly to CAM and PLM (Product Lifecycle Management) systems.