House of Quality diagrams use a design that resembles the outline of a house and can be created using technical and competitive benchmarking data. QFD is considered the primary tool used during quality function deployment to help facilitate group decision-making. As the diagram below illustrates, QFD is used to identify critical customer attributes and create a specific link between customer attributes and design parameters. The left side displays the customer requirements, the ceiling, which describes the technical features specified by the customer, the roof that describes the relationships between the various features and requirements—the lower level, which shows technical benchmarking between the organization and its competitors
