“…Signiicant efort has been made by the HCI and CSCW communities to discuss infrastructuring as a concept, including special issues [22]. The contribution we wish to focus on is that of Bodker et al [5] and Lyle et al [19,20] who enrich the ecological perspective of Pipek and Wulf with an understanding of actions of people surrounded by the technology, be they designers, users, or other stakeholders, through the concept of strategies and tactics (drawn from De Certeau [7], and, in HCI, more widely disseminated by Dourish [9]). As concepts, strategies and tactics allow for an interpretation of people's actions discussing the bases of their agency in any speciic time: when social actors have their own space and resources through which they can project in the future, they are acting strategically; when they act in a space and with resources deined mainly by others, they are acting tactically.…”