The QFD has been used for product development for a long time. Nowadays, at the current level of maintenance, we used the QFD to innovate in the prioritization of assemblies and subassemblies that must have their planned maintenance. To achieve the proposed objectives, we firstly reviewed the literature, then analyzed the maintenance data of a production line, calculated the correlation between the needs of the sector of production with each subset of equipment that make up the line, and then constructed the QFD to prioritize the maintenance planning of the most important sets for product quality. The findings showed that the current planning model has a high level of assertiveness on the equipment schedule, but a prioritization using QFD assist in the specification of which subset undergoing maintenance, increasing the availability and reliability of equipment. The results showed there was an increase of efficiency from 79.25% to 83.76% in one year.