Nowadays the metalworking sector is one of the most requested areas due to the exponential growth of industries dedicated to key manufacturing components related to metal products, such as mining, commerce, construction, furniture, office, petrochemical, among others. Faced with a stricter demand and a highly competitive market, strategies are required to generate more agile and efficient processes in order to offer products with the required quality, but, as far as possible, at the lowest cost. This article presents the study and optimization of the punching process within a metalworking industry through the reduction of the times involved in the model changes of the: speaking bracket of Aristocrat – MARS Portrait Enclosure product.  The above with the application of techniques such as Value Stream Mapping (VSM), Single-Minute Exchange of Die (SMED) and Poka-Yoke; in a framework of administration and project management. The development of previousn methodological framework allows represent and analyze the flows of materials and information involved in the punching process through the SMED. On the other hand, Computer-Aided Design (CAD) is used to design a plate that allows implement the SMED philosophy with the operators involved in the area. Subsequently, the plate is manufactured and defined as Poka-yoke for the forming dedicated tool to minimize errors in the operation of the process. Finally, this paper serves as an improvement project for the flex Company currently located in Mexico.