Developing and using Symbiotic Recursive Systems (SRS) concerns various incompletely defined domains requiring handling prevention and control. This means that, in the innovation process, it is important to avoid decline and obsolescence as it happens with modern paradigms of innovation. This paper presents the specificities of SRS that call for a new model of evolutive improvement. Such a new model needs to handle prevention and control in SRS as well as in the improvement process. The paper presents such a model we call ‘Pulsation’. Symbiotic Recursive Pulsative Systems are then SRS including the process of Pulsation.