**5. Conclusions**

It is considered that the goals of this work have been achieved, once from the studied concepts in the theoretical consideration it was possible to analyze a model for the product redesign, which provided reduction in the components number in the assembling processes number, the assembling/manufacturing time and the product redesigning cost-goal.

Preliminary analyzing at Company A the difference between locks costs, manufacturing time, assembling time and facilities by the new model, one sees it will be a very positive change and, although some high cost with the machined model acquisition, such an amount will be rewarding with the time.

The recommendations for the Company B product were made with the care not to significantly alter the current company´s infrastructure in terms of the machines and tools, facilitating the development of the presented solutions and not needing any big investment for its deployment.

The research showed too that the integration of design for manufacturing and assembly (DFMA) with the rapid prototyping, in a reverse engineering approach, as proposed by Souza (2007), is an adequate strategy for the improvement (redesign) of products in small sized companies. The reverse engineering allows the study of other technologies or manufacturing and assembly solutions, components standardization, secondary operations reduction, among others.

The model proposed by Souza (2007) showed consistent for making product redesigns. It is expected that the current work can contribute to the incremental validation of this model. It is advised that other researchers use this same model in another similar research, aiming a possible generalization of the same future.
