Abstract
Through a work domain analysis, utilizing a mixed-methods approach, an understanding of the motivations and constraints of the emergency services domain was gathered. The domain analysis revealed a significant shortcoming of the currently-implemented systems when they are tasked to respond to atypical situations, such as mass-casualty incidents. The collected qualitative data was encoded into an abstraction hierarchy model which has been modified to represent the elemental components of an information system: information, technology, and people. The resulting I-T-P Abstraction Hierarchy model can be used to guide the design of information systems which have the capacity to scale between normal day-to-day operations, up to significantly more complex situations.
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