Reduced product development expenses and lesser design cycles are some advantages of using CAD drawings. Some CAD programs, such as AutoCAD, support conversion from manual drawings to electronic ones. Aside from designing products, some CAD software can also support raster to vector conversion. 2D drafting service, such as 2D drawing corrections, require adherence to CAD layering standards. 3D-based CAD services include 3D rendering services which makes images look like photographs, and animating 3D models. Designs look best with advanced computer technologies such as Pro-E and AutoCAD. CAD/CAM services involve the use of product life cycle management and also include drafting services to convert hand drawings to electronic drawings. They use CAD packages to do the conversion. Mechanical CAD services are very useful for design engineers who deal with assembly drawings for mechanical assemblies, while electrical CAD services are very useful for electrical engineering designers. CAD services provide an end product without the worries caused by limited time period or lot of paper works.

Reference:
Ankita Shah. “Benefits of CAD Services.” Online posting. 3 Jan 2010. Architectural [3D Rendering]. 20 July 2010 <http://www.microbos.com/articles/benefits-of-cad-services.html>.