IIntegration of Design and Construction:Reasons and Mechanism of Evolution of the Construction Project Delivery Systems

Due to the separation between design and construction, the traditional general contracting has features of long construction period and high construction cost. The construction clients require short construction period, low construction cost greatly by reason of serious business competition and rapid development of techniques. Kinds of non-traditional construction project delivery systems emerged accordingly. Non-traditional delivery systems provide frameworks for integration of design and construction. The realization of integration of design and construction in the non-traditional delivery systems is far from automation, but mainly via the techniques of constructability study and fast track. Mere frameworks are by no means efficient. The technical factors of integration of design and construction should be considered in China’s project general contracting system and construction project management system to improve the efficiency in construction industry.