Ian Sommerville

critical systems dependability lscits socio-technical software engineering it systems systems engineering computer security requirements ulss critical infrastructure requirements engineering security cybersecurity tutorial process improvement complexity failure security engineering safety cni scada software testing fault-tolerance software specification reliability system engineering systems design virus/worm internet digital learning environment malware redundancy diversity air accident kegworth system engineer cloud computing nasa organizations cooperative work cscw workflow ethnography case study human error systems education research system engineering scale responsibility modelling recovery