potential only can be realized fully if implementations are based on a solid understanding of the key factors that determine the usefulness of such systems. Objective: To provide a framework for analyzing and evaluating the key factors involved in the design of ICT-based systems for coordination and control of disaster response. Methods: A prototype system for gathering and sharing emergency medical information was implemented using hand-held computers and a wireless network. Based on

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... s with this system, a framework was developed for the design of ICT systems for coordination and control, providing: (1) definition of indicators of the effectiveness of information sharing enabled by a technological solution; (2) classification of the types of information to be shared during disaster response; (3) classification of mechanisms for information sharing (including traditional mechanisms); and (4) assessments of which methods are best suited to which types of information. Basic level, ICT-based information-sharing ensures that individual data items are delivered to everyone involved, but does not process the data into information. More advanced systems can collate information (e.g., produce reports indicating how many persons are suffering from a particular condition). With derived level information-sharing, the ICT system can perform possibly complex computations to calculate higher-level measures and indicators based on combinations of basic data items. This presentation will discuss how derived level information-sharing can be linked to the concept of indicators of function and basic societal functions (BSF), as defined in the Utstein Style. Conclusions: Information and communications technology-based systems have a key role in supporting effective coordination and control in disaster response. The framework presented here can act as a common reference for the design and assessment of such systems.