<Li> Document management and revision control using Product Data Management (PDM). </Li> <P> CAD is also used for the accurate creation of photo simulations that are often required in the preparation of Environmental Impact Reports, in which computer - aided designs of intended buildings are superimposed into photographs of existing environments to represent what that locale will be like, where the proposed facilities are allowed to be built . Potential blockage of view corridors and shadow studies are also frequently analyzed through the use of CAD . </P> <P> CAD has been proven to be useful to engineers as well . Using four properties which are history, features, parameterization, and high level constraints . The construction history can be used to look back into the model's personal features and work on the single area rather than the whole model . Parameters and constraints can be used to determine the size, shape, and other properties of the different modeling elements . The features in the CAD system can be used for the variety of tools for measurement such as tensile strength, yield strength, electrical or electro - magnetic properties . Also its stress, strain, timing or how the element gets affected in certain temperatures, etc . </P> <P> There are several different types of CAD, each requiring the operator to think differently about how to use them and design their virtual components in a different manner for each . </P>

How cad links with other software and hardware