ABSTRACT
Although there are abundant theoretical frameworks for diagnosis in the laboratory or in the field, they present serious limitations in Dynamic Environment Supervision (DES). However, empirical data collected on expert operators can lead toward a more extended model which takes dynamic features of the environment into account. A functional analysis of the supervisory activity is delineated that stresses the link between diagnosis and overall operator activity (especially decision-making). The main theoretical contributions and limitations of current models of diagnosis are presented. Two aspects of diagnosis are examined: (a) the declarative basis — knowledge bases and representations on which it is established (in particular time knowledge); (b) the procedural basis — diagnostic strategies. This chapter ends with a proposal for an extended model of diagnosis and decision-making in DES.
