5.1.1 - CAD Software

Computer Aided Design (CAD) software is an example of application software, software installed on the computer to carry out a specific task.

CAD uses computer technology to design  real or virtual objects in two-dimensional (2D) or three-dimensional (3D) space.

As well as shapes and solids, CAD often involves information such as materials, dimensions and tolerances.

Advantages of using CAD:

• The software supports very accurate measurements meaning scale drawings can be produced.
• CAD files can be exported to Computer Aided Machinery (CAM) to allow physical parts or models to be created.
• CAD software has a library of preset shapes and objects which can easily be accessed and means many items do not need to be drawn from scratch.
• Layering means objects can be moved independently and arranged in front/behind others.
• Copy/paste allows objects to be quickly replicated.
• Grouping allows objects to be easily moved together or have their properties changed.
• 3D models can be be made to look very realistic by using textures, colours, shading, lighting and perspective.
• 3D views allow realistic views of finished objects which can be rotated, as well as the ability to fly/walk through and around buildings.
• Many CAD packages allow the user to analyse the costs of materials and produce estimates for manufacture.