In this chapter we present an instance of how organisational knowledge is constructed, collected and used in the setting of a large hospital trust in the North of England. Our main concern here is to focus upon how representational artefacts of organisational activities and ‘states of play’ are oriented to in the everyday work of hospital staff — mainly a directorate manager and a ward sister. Here we are specifically focusing on the situated character of the representational artefact — a ‘beds board’- and the system of calculability that it affords in the hospital setting. Our view is that such representations must be understood as embedded within the practicalities of the setting, and that any assumed benefits of replacing existing systems must be carefully considered.