Abstract
This article examines how communication contributes to the achievement of spatio-temporal closures through the interactional enactment of sequences called ‘schemata.’ Human and nonhuman interactants not only bring into being but also contribute to the opening, development and closing of organizational sequences, which constitute and circumscribe what gets done collectively. Timing and spacing thus consist of creating and sometimes interrupting what could be called organizational closures, that is, spatio-temporal limits that indicate when and where specific organizational episodes are initiated, fulfilled and sanctioned. Organizational spaces and times are thus achieved and delineated through interactions, a phenomenon that will be illustrated through the in-depth analysis of a radio transmission that involved police officers trying to locate and rescue one of their colleagues.
