As underlined in Figure \ref{564422}, in a multi-project environment, at the first level (CDE of Sharing) the sharing environments are separated to each other4. Passing the “privacy layer” where are filtered the sensitive information, you meet the “layer of deconstruction” that for each project deconstruct the model5 and reorganise the contained data in a new database as presented in previous sections. The second level environment collects all the information provided by different projects,  transforming data that traditionally born and die on a single project, in useful atoms that feed a wider basin of shared knowledge. A single project is for its nature isolated to the expertise of the personnel involved in the project itself. Thus, is required a proactivity of the information in order to promote the development of new systems of assisted design based on data \citep{Pavan_Antisari_Mirarchi_Rizzarda_2017}