The application of data mining techniques to the managing of software development projects (SDP) is not an uncommon phenomenon, as in any other productive process that generates information in the way of input data and output variables. In this paper, a set of tools developed by the authors, that generate, in a visual way, managing rules suitable to cover minimum goals in a SDP are presented. Although the techniques used are able to generate quantitative rules, giving numeric values suitable for these goals, the visual representation of these rules helps their easy and quick understanding by a manager of a SDP. The application to a database generated from the simulation of a project allows to establish a profitable comparison and to demonstrate the validity of the techniques.