Model-based software development is carried out as a Well-defined process. Depending on the applied approach, different phases can he distinguished, for example, requirements specification. design, prototyping, implementation. and usability evaluation. During this iterative process, manifold artifacts are developed and Modified, including models, source code, and usability evaluation data. CASE tools support the development stages well. but lack a seamless integration of usability evaluation methods. We aim at bridging the gap between development and usability, through enabling the cooperative use of artifacts with the particular tools. As a result of integration usability, experts save time to prepare an evaluation and evaluation results can be easily incorporated back into the development process. We show exemplary Our work on enhancing the Eclipse framework to support usability evaluation for task model-based software development.