Most analyses about risk in implementing large-scale information technology have tended to focus on discrete outcomes and to draw boundaries which often fail to capture important social relationships. It is argued here that the risk of failure needs to be interpreted operationally, not just as inherent in certain structural features of the environment or of a project, but also as arising from distinct human and organizational practices and patterns of belief and action. The emphasis is on the mutual influence between the large-scale information technology, the context in which it is being embedded, and the process of its implementation. Drawing on the rich data of the implementation of an automated baggage-handling system at the Denver International Airport, this presentation aims to foster discussion about risks associated with theimplementation of large-scale information technology systems.