Faced with the development of new forms of work organization, collective intelligence is proving to be an important issue for the efficiency of the functioning of organizations. However, this concept is not currently stabilized in Management Sciences. Moreover, few tools are available to managers and researchers to identify it concretely. How can the concept of collective intelligence be defined concretely and operationally and how can it be identified within organizations? We propose the following definition of collective intelligence: all the capacities of understanding, reflection, decision and action of a human-sized work group resulting from the interaction between its members and implemented to face a present or future work situation. A review of the literature devoted to the functioning of work collectives will help us draw the contours of collective intelligence, before identifying its main dimensions and proposing hypotheses for indicators to better identify it within companies.