1. Industrial and Management Systems Engineering, West Virginia University, Morgantown, WV 26506, USA
2. ICT Applications for Production, BIBA – Bremer Institut fuer Produktion und Logistik, 28359 Bremen, Germany
3. Design, Manufacture & Engineering Management, University of Strathclyde, Glasgow G1 1XJ, UK
4. Department of Integrated Product Development, University of Bremen, 28359 Bremen, Germany