A distributive and collaborative concurrent product design system through the WWW/Internet

Concurrent engineering involves the integration of people, tools, informati on, and processes into a responsive and efficient system. This paper addres ses a kev requirement in distributed concurrent engineering, namely, the ab ility for geographically dispersed and disparate parties, having heterogene ous computing platforms, to exchange design and manufacturing data. The dev elopment of an effective and efficient collaborative product design support environment based on the WWW/Internet is presented. A new method that redu ces the transmission time through the use of macro files is proposed to rea lise the real-time communication together with a monitoring methodology for synchronising group operations, and maintaining consistency of shared CAD models in a cooperative design review (co-modifying) process. Based on the proposed methods, a software interface has been developed to extend the tra ditional single location CAD software system to a multi-location applicatio n for coordinated product design through the Internet. This software interf ace was coded in Java. The architecture is a connection-oriented client/ser ver structure using TCP/IP protocol. Unigraphics on a UNIX Workstation and MicroStation on Windows NT have been successfully integrated. The findings of this paper allow, product designers to exchange and share product data, communicate with team members, modify geometry data on particular aspects o f the design, and maintain operations consistency in all the distributed co operative sites on a wide variety of platforms.