“…Early examples include distributed process control and error diagnosing in wastewater treatment plants (Nielsen and Søndergaard, 2000), and the use of mobile multimedia for telemedicine and early diagnosing in emergency ambulance services (van den Anker and Lichtveld, 2000). More recent examples include logistic vehicle management at automobile terminals (Rügge et al, 2009), vessel control within the fishing industry (Lumsden et al, 2008), and mobile technologies in hospital settings (Tang and Carpendale, 2008;Skov and Høegh, 2006;Bardram and Hansen, 2004). In order to avoid mistakes and accidents in such safety critical work domains, it is important to understand the state of the systems being operated.…”