http://.cadanda Engineering Design Knowledge Management in De-centralised Virtual Enterprises Hayder Aziz 1 , James Gao 2 and Zheng-Xi Li 3 1 Al-Muthanna University, Samawa Iraq, hayder@uruki 2 University of Greenwich, j.gao@gre.ac.uk 3 North China University of Technology, lzx@ncut.edu....