ABSTRACT
The concept of Situation Awareness (SA) focuses on how operators in complex systems acquire and maintain sufficient awareness of 'what is going on' in order to achieve safe and efficient task performance. Its importance is such that it is now widely recognised to be a critical consideration in system design and evaluation. Describing SA from a distributed cognition type perspective is nothing new; in the late 1990s Artman & Garbis first called for a systems perspective model on SA, suggesting that the predominant individualistic models of that time were inadequate for studying SA during teamwork. Propositional networks can be constructed from a variety of data sources, depending on whether Distributed Situation Awareness is being modelled or assessed. The SA requirements of each of the different team members involved were extracted from the Hierarchical Task Analysis that was developed for the planning process.
