Computer-aided Design

These features control how geometry behaves and how parts relate to one another. Dimensions specify measurable design requirements, constraints preserve intended relationships during revisions, and assembly relationships organize components within a larger system. Together, they help maintain design intent as engineers modify individual features, reducing inconsistencies across parts, assemblies, and associated documentation.

Different geometric entities provide different levels of control over a design. Points and lines support basic geometry, surfaces describe external forms, and solid features represent objects with volume. This layered representation allows engineers to build precise two- and three-dimensional models, revise selected portions efficiently, and prepare the same design for analysis, documentation, or manufacturing-related work.

A digital model can be examined and analyzed before a physical version exists. Engineers can visualize the design, apply relevant material information, and use simulation or other analysis capabilities to identify problems early. Finding errors during digital development can reduce the need for costly physical changes and improve confidence before prototyping, fabrication, or construction.

A typical workflow begins by creating geometric entities and developing them into a two- or three-dimensional model. Engineers then add dimensions, constraints, materials, and assembly relationships as needed. The completed model can support documentation, visualization, analysis, prototyping, or computer-aided manufacturing, while revisions remain possible before the design moves toward physical production or construction.

CAD supports a broad range of engineering work, including products, buildings, machines, and infrastructure. Its models can serve drafting and documentation needs, communicate design intent through visualization, and provide input for simulation, prototyping, or computer-aided manufacturing. The same digital approach therefore applies across both individual components and larger physical systems.

A shared digital model gives project participants a precise representation that can be revised and documented without repeatedly redrawing the design manually. This supports clearer communication, faster iteration, and more consistent engineering records. By exposing errors earlier and shortening revision cycles, CAD can reduce development time and the cost associated with later fabrication or construction changes.