Product redesign evaluation: An improved quality function deployment model based on failure modes and effects analysis and 2-tuple linguistic

An improved quality function deployment model based on integration of design failure mode and effects analysis and 2-tuple linguistic is proposed to guide the design scheme selection in the product redesign process. By adopting the entropy weight approach, the risk priority number of the risk assessment index is improved. Meanwhile, the improved results are fed back in quality function deployment to reassess the target values. In addition, the accuracy of the model on the basis of 2-tuple linguistic is improved in the process of information evaluation and data processing. Finally, the model is applied in the case of gear reducer to demonstrate its applicability. This model can not only improve the product's reliability, but also enhance the quality of product by taking the customers' needs and product's risk priority number into consideration simultaneously and therefore improve the market competitiveness of the products.