ABSTRACT
If the schema itself captures distinct and substantive measures of the mechanisms underlying the functioning of the system, then when one observes those measures reasonable conclusions concerning the underlying mechanisms can be made, and those conclusions can be applied to both individual events and aggregate analysis of those events. This chapter focuses on the importance of taxonomies on that aggregate analysis. Indices of risk are computed based upon measures of the severity and likelihood of hazards, and the effectiveness of controls. Research completed in the mid 1980s by Fleishman and Quaintance suggest that the most effective taxonomy for describing human factors in a given context is one in which the development of the taxonomy was based on information gathered from the targeted context and developed for a pre-defined goal. Threats are issues that crews encounter that they must manage during a flight.
