Affiliation: | 1. Aalto University, School of Science, Department of Industrial Engineering and Management, P.O. BOX 5500, FI-00076 Aalto, Finland;2. University of Oulu, Department of Industrial Engineering and Management, P.O. Box 4610, FI-90014 University of Oulu, Finland;3. Metso Automation Inc., PO Box 310, FI 00811 Helsinki, Finland |