This project aims at developing a computer program prototype that should help the students improve the quality of their written French. The concept of diagnostic assessment that is adapted to the learner and the context in which he is placed will be operationalized. The project focuses on the revision phase, as described by Hayes and Flower, at the college level. Texts have been devised and field tested for a calibration using a facet model. In addition to the feedback during the work session, the system will provide a diagnostic summary of the revision competency.