1. Professor, We-B Centre, School of Management Information Systems, Faculty of Business and Public Management, Edith Cowan Univ., Joondalup, Perth WA 6027, Australia.
2. Professor, Raymond Y.C. Tse, International City Univ. of America and Hong Kong Institute of Real Estate, 13/F, Asian House, 1 Hennessy Rd., Hong Kong.
3. Senior Lecturer, Off-Highway Plant and Equipment Research Centre (OPERC), Dept. of Civil and Building Engineering, Loughborough Univ., Loughborough, Leicestershire, LE11 3TU UK.