Abstract
Model transformation plays an important role in the model-driven engineering (MDE) approach which has the capability to generate the system code from a conceptual model. In fact, it describes the process of converting one model into another of the same system. Considering a source model, there may be several ways to transform it into target models with the desired usability attributes. This paper proposed an original approach that considers the interactive systems generation process as a usability optimization problem by the MDE approach. The aims were to generate all possible concrete user interfaces from a given abstract user interface. Then, the usability optimization process selects the model transformation were the desired usability attributes are fulfilled.