This paper gives an overview of the current state of the art in man-ma
chine system interaction studies, focusing on the problems derived fro
m highly automated working environments and the role of humans in the
control loop. In particular, it is argued that there is a need for sou
nd approaches to the design and analysis of man-machine interaction (M
MI), which stem from the contribution of three expertises in interfaci
ng domains, namely engineering, computer science and psychology: engin
eering for understanding and modelling plants and their material and e
nergy conservation principles; psychology for understanding and modell
ing humans an their cognitive behaviours; computer science for convert
ing models in sound simulations running in appropriate computer archit
ectures.