The basis of these explanations is the chain-of-events theory of the causes of aviation accidents or incidents. HFACS categorization framework has four level sie. unsafe acts, organizational factors, preconditions for unsafe acts, and unsafe supervision.
In attempts to deal with human error, Human Factor Analysis and Classification System can be both proactive and reactive. The system can be proactive when used as a framework for predicting unsafe acts that contribute to aviation incidents or accidents ("Evaluation of the Human Factor Analysis and Classification System," 2008). In this case, HFACS helps in understanding skill-based errors, decision errors, and perpetual errors. The findings are then used to develop effective interventions that lessen the frequency and impact of such errors in aviation. On the contrary, the system can be reactive when used to predict higher levels human error within the hierarchy....
This does not necessarily lead to the development of effective interventions but approaches that focus on lessening higher-level factors. Actually, the prediction of higher-level human factors is usually carried out after the occurrence of an accident or incident.
