An ordinary perspective drawing gives no information about hidden details of the subject and is not drawn to scale. The technique of conventional drafting is to use two or more projections to represent solid objects. The projections are views of the object and are not complete in themselves, but when taken together they represent every shape and dimension of the object. This techniques is known as Orthographic Projection. Engineers and designers are responsible for ideas and concepts to make mechanical devices run more efficient and productive.
Architects develop concepts for residential and commercial buildings.
Both of these individuals are assisted by the CAD Drafter. Detail, subassembly, and assembly type of drawings are prepared according to specific industry standards. In most cases, prototype parts or models are made before the part is massed produced or the building is erected. The original drawing is the only the beginning. Many revisions can and most likely will be made before the final drawing is released for production.