Technology Evolution ■78：Drawing Based(Digital Drawings)) 88:Feature Based (Digital Models) Solid,Features,Visualization ■95：Process Based(Digital Processes) Process Integration:Auto,Aero,Machinery,Mold ■ 99:Knowledge Based (UG V16)(Digital Knowledge) Process Wizards,Optimization,Rules Based Modeling Shanghai Jiao Tong University 6Shanghai Jiao Tong University 6 Technology Evolution n 78: Drawing Based (Digital Drawings) n 88: Feature Based (Digital Models) n Solid, Features, Visualization n 95: Process Based (Digital Processes) n Process Integration: Auto, Aero, Machinery, Mold n 99: Knowledge Based (UG V16) (Digital Knowledge) n Process Wizards, Optimization, Rules Based Modeling