NASA / CP - 2003 - 212642 Second Workshop on the Investigation and Reporting of Incidents and Accidents , IRIA 2003

We propose a framework using system dynamics to model the dynamic behaviour of organisations in accident analysis. Most current accident analysis techniques are event-based and do not adequately capture the dynamic complexity and non-linear interactions that characterize accidents in complex systems. In this paper we propose a set of system safety archetypes that model common safety culture flaws in organizations, i.e., the dynamic behaviour of organizations that often leads to accidents. As accident analysis and investigation tools, the archetypes can be used to develop dynamic models that describe the systemic and organizational factors contributing to the accident. The archetypes help clarify why safety-related decisions do not always result in the desired behaviour, and how independent decisions in different parts of the organisation can combine to impact safety.