Chapter 5. Drawings
Engineering drawings are important in engineering for two reasons. First, designers use them to document their designs. Second, they are the de facto standard in design communications among the various groups and departments involved in the product design and manufacturing (e.g., manufacturing, tooling, production, inspection, assembly). The typical (standard) sizes of engineering drawings are A, B, C, D, and E.
Generating engineering drawings requires knowledge of drafting and communication rules. In general, it is not a good idea to over-dimension or under-dimension views, just as it is not a good idea to over-define or under-define sketches. The drawing should be fully defined, just like a sketch. Figure ...