Revising rules and reviving knowledge in the Norwegian railway system

Safety rules have been directed at control of known risks and can be seen as a result of the knowledge at the time of the rule making. In Baumard’s terminology they represent explicit collective knowledge (Baumard, 1999). However, there is a general concern that it is neither possible nor wise to transfer all lessons learned into explicit collective knowledge and rules (Baumard, 1999; Hale, 1990; Rasmussen, 1997; Reason, 1997).