María José Escalona IWT2 Research Group Department of Computer Languages and Systems University of Seville Av. Reina Mercedes S/N 41012 Seville, SpainGustavo Aragón IWT2 Research Group FIDETIA University of Seville Av. Reina Mercedes S/N 41012 Seville, SpainHenry Linger Faculty of Information Technology Monash University P.O. Box 197 Caulfield East, VIC 3145 AustraliaMichael Lang Business Information Systems Group Cairnes School of Business & Economics National University of Ireland Galway University Road Galway, IrelandChris Barry Business Information Systems Group Cairnes School of Business & Economics National University of Ireland Galway University Road Galway, IrelandChristoph Schneider City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong