Abstract: Requirements analysis of IT-support for rescue management showed that electronic checklist support is a vital function of any IT-based assistance system. Although checklists are a simple approach, their successful implementation and use depends on many factors. We nevertheless believe that Intelligent Electronic Checklist Sup-port Systems (IECSS) are especially helpful for the (inter-) organizational cooperation in disaster scenarios like mass casualty incidents (MCIs). In this paper we describe why, when, and how electronic checklists can be used to coordinate the work of the geographically dispersed rescue forces. For this purpose we will have a look at safety-critical and complex tasks in aviation and medicine where checklists already are successfully used and try to profit from this experience for the MCI domain. Â© 2012 ISCRAM.