| Summary: | There is renewed interest in the use of activity simulation in design, not only in France but internationally, particularly in Brazil and Denmark. This article examines the principles established through activity simulation in ergonomics, with a view to developing the mechanisms underlying activity simulation in order to shed more light on its potential use, and to open up perspectives for its application. It is organized into three parts. The first offers a reminder of the fundamental achievements of simulation over the last thirty years, up to its current formalization and development. The second seeks to provide a more in-depth theoretical analysis of activity simulation mechanisms as they relate to the activity itself. The third explores current perspectives for simulation, first by activating its capacities in different directions for feedback on the prescription system and on the action logics of active subjects, and then by broadening the objects of conception it allows us to approach.
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