Thomas Ludwig reveals design characteristics when aiming at researching information infrastructures and their diverse information resources, types of users and systems as well as divergent practices. By conducting empirically-based design case studies in the domain of crisis management, the author uncovers methodological and design challenges in understanding new kinds of interconnected information infrastructures from a praxeological perspective. Based on implemented novel ICT tools, he derives design characteristics that focus on integrating objective and subjective queried insights into...