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This study investigates the organization of upper body coordination in tasks involving complex visual and manual demands. In the past, bimanual coordination has been approached in the context of symmetric or asymmetric interactions of the two hands. But routine behavior associated with work tasks requires synchronization in time and space of multiple components across multiple concurrent actions. Hence the problem of upper body coordination involves a combination of both symmetric and asymmetric modes of interaction, with a dynamic switching between the two. Although current models may explain the two modes of interaction individually, none of the existing models account for an integration of the two modes from the perspective of task performance. A pilot study was conducted in which subjects performed assembly tasks involving object transfers and manipulations with varying levels of visual and manual demands and performance constraints, such as speed and precision.