Quality function deployment (QFD) is a method developed in Japan to help transform the voice of the customer into product characteristics and to control quality in the development/production phases. It minimizes the risk that products or services are far from the costumers’ needs and promotes company integration and quality management. Starting with the description of the “House of Quality,” the chapter explains how to build a QFD. Strengths and weaknesses of the methodology are also presented to the reader.