1. Centre for Concurrent Enterprise, School of Mechanical, Materials, Manufacturing Engineering and Management, University of Nottingham, University Park, Nottingham, NG7 2RD UK
2. c/o Warwick Manufacturing Group, University of Warwick, Coventry, CV4 7AL, Rolls Royce Plc, Derby, UK
3. Bremen Institute of Industrial Technology and Applied Work Science at the University of Bremen (BIBA), Department of Computer-Aided Design, Planning and Production, PO-Box 33 05 60, D-28335 Bremen, Germany