Researchers in management have gradually given up the idea that a mode
l based on planning, measurement, and predictability can be defined fo
r predetermining and piloting all acts of production. An ever improved
modelization cannot make up for the short-comings left by the manager
ial machine. On the contrary, there must be taken to be opportunities
for engendering new actors capable of playing the role of an interface
and looking for compromises, thanks to arrangements that authorize br
inging rules of behavior under scrutiny and eventually modifying them.