Incident Command systems often achieve situational awareness through manual paper-tracking systems. Such systems often produce high latencies and in-complete data, resulting in inefficient and ineffective resource deployment. The WIISARD system collects much more data than a paper-based system, dramati-cally reducing latency while increasing the kinds and quality of information available to incident com-manders. Yet, the introduction of IT into a disaster setting is not without problems. Most notable is that temporary system component failures delay the deliv-ery of data. The type and extent of the failure can have varying effects on the usefulness of information displays. We describe a small, coherent set of cus-tomizble information overlays to address this prob-lem and discuss reactions to these displays by a medical commander.
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