1. Ecole des Mines de Saint‐Etienne and UMR CNRS 6158 LIMOS, CMP Georges CharpakGardanneFrance
2. LIMOS, UMR CNRS 6158 and ISIMA, Campus des CézeauxAubière CedexFrance
3. School of Industrial EngineeringEindhoven University of TechnologyEindhovenThe Netherlands