1. A method of horizontally structured CAD/CAM modeling and manufacturing for concurrent product and process design, comprising: selecting a blank for machining into an actual part establishing a coordinate system; creating a master product and process concurrent model comprising: a virtual blank corresponding to said blank; a manufacturing feature; virtual machining of said manufacturing feature into said virtual blank; and said manufacturing feature exhibiting an associative relationship with said coordinate system; generating a product drawing of said actual part; and generating machining instructions to create said actual part by machining said manufacturing feature into said blank.