Engineering is the discipline and profession that applies scientific theories, mathematical methods, and empirical evidence to design, create, and analyze technological solutions, balancing technical requirements with concerns or constraints on safety, human factors, physical laws, regulations, practicality, and cost. In the contemporary era, engineering is generally considered to consist of the major primary branches of chemical engineering, civil engineering, electrical engineering, materials engineering and mechanical engineering.[1] There are numerous other engineering sub-disciplines and interdisciplinary subjects that may or may not be part of these major engineering branches.