CAD design, computer-aided design, is the use of computer system in the creation of products, devices, machines and their elements.
CAD software gives possibilities to create three-dimensional (3D) models and merge them into one virtual assembly. Virtual assembly gives opportunity to check suitability of components and make required changes before production. CAD software enables to make strength calculations, simulations and prepare for advertisement by making visualization.
To create CAD design a task is required. This can be technical specification, 3D scanned file or two-dimensional draft (drawing, sketch, photo).