Subject-centred and systemic conceptualisation as a tool of simulator training

The paper introduces a methodology which provides conceptual tools for the analysis of decision-making in the control of complex dynamic processes. Th e teals are based an theoretical concepts which describe derision-making as a systemic interaction between the operators and the process. This interac tion is conceptualized in order to be able to evaluate operators' habits of action in decision-making and in collaboration. The habits of action are e xpected to contribute to the situational adaptability of process control ac tions. The methodology can be applied to different contexts of process cont rol. A training method, developed for the simulator training of a nuclear p ower plant, is introduced as an application.