1. Department of Management Science, University of Strathclyde, 199 Cathedral Street, Glasgow G4 0QU, UK
2. Mechanical Engineering and Design Group, School of Engineering and the Built Environment, Edinburgh Napier University, 10 Colinton Road, Merchiston Campus, Edinburgh EH10 5DT, UK
3. Institute of Materials and Processes, School of Engineering, University of Edinburgh, Robert Stevenson Road, The King’s Buildings, Edinburgh EH9 3FB, UK
4. National Manufacturing Institute Scotland, University of Strathclyde, 85 Inchinnan Drive, Renfrewshire PA4 9LJ, UK