The design of Engineer-To-Order products needs tools and methods for reducing time and cost during the phase of the quotation preparation. Modularization is one of the more applied design methods for ETO systems; however, it is necessary to integrate traditional tools with practices of design optimization in order to im-prove the development of a proposal. Even if commercial design tools for model-ling specific types of engineering systems are available, the application of design optimization is still based on the use of tools not integrated with each level of the design phases. Moreover, these tools often require a software customization. In fact, the integration of geometrical modelling, simulations, analysis, and optimiza-tion concerns t...