Olivier Boissier is Full Professor of Computer Science at Mines Saint-Etienne (France). Rafael H. Bordini is Associate Professor in the Faculty of Informatics at Pontificia Universidade Cat lica de Rio Grande do Sui (Brazil). Jomi F. H bner is Associate Professor at University of Santa Catarina (Brazil) in the Department of Automation and Systems Engineering. Alessandro Ricci is Associate Professor of Computer Science and Engineering at the University of Bologna.