The aim of this chapter is to identify the criteria for a change of the project model and its results in terms of the production of possible individuals and of the capacity to generate evolution.

The first level relates to a quality which functions as a dynamic verification instrument within the paradigm of complexity, which is not measured as the overall capacity to respond to needs expressed more or less as a difference between an imaginary, desired and existing virtual scene. Indeed, when "man is faced with a choice he does not operate analytically (which in the long run does not bring about an evolution but amounts to the repetition of what is known) but imagines one or more virtual worlds and opts for that which is closer to the mental image of the virtual world that he could imagine." 38

Identity as a guarantee of quality is an important parameter, "that environmental quality which protects man from getting lost and which is defined by Lynch as imaginability. It is that form, that colour, that order which facilitates the construction of well-identified, strongly structured and therefore very useful mental images of the environment." 39

The second level involves the image which is in continuous evolution because, like the real world evolves, the imaginary one also evolves towards increasingly desirable new scenes. It is in this very evolution, in this subsequent accumulation of meaning, where we can find the mechanism which allows the measurement of the correspondence between the real and the intersubjective images.

The verification of exceptions should not be seen as a mistake because they are in that they can overturn the paradigm and they allow the proliferation of new virtual scenes.

The same exception, controlled by an "On-Off" switch within a precise structure, once accepted will come into play again as a subsequent request and will play a role in the growth of the complexity of the artificial event characterising individual events.