The creative application of scientific principles to design or develop structures, machines, apparatus, or manufacturing processes, or works utilizing them singly or in combination; or to construct or operate the same with full cognizance of their design; or to forecast their behavior under specific operating conditions; all as respects an intended function, economics of operation or safety to life and property. Professional art of applying science to the optimum conversion of the resources of nature to the uses of humankind.

Engineering is based principally on physics, chemistry, and mathematics and their extensions into materials, solid and fluid MECHANICS, THERMODYNAMICS, transfer and rate processes, and systems analysis. A great body of special knowledge is associated with engineering; preparation for professional practice involves extensive training in the application of that knowledge.