This paper presents a global human-machine communication model which explains data flow in an organization based on working position. This model is illustrated by the Air Traffic Control domain. A methodological approach is then proposed for studying the communications between Approach Control working positions, with regard to cooperative work. The second part of this paper presents the basic features of COMODO as a result of the human communication analysis. Here, two types of cooperation related to the physical separation between working positions, i.e. face-to-face and distance cooperation, are detailed. Two case studies illustrate face-to-face cooperation using the communication flow representation.
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