Quality Function Deployment (QFD) provides a sound understanding of what should naturally occur in design. Its principles are essential knowledge for design and system developers. We can apply QFD to any project that, for one, is a development activity and, two, has a definable customer. This includes products, parts, materials, services, events, software and websites. The book describes the 4-phase QFD approach. The approach conforms to the ISO 16355-1:2015 guidance standard. The House of Quality is explained, as a planning tool for transferring the priorities in customer and stakeholder requirements into the final product. The book further introduces some development tools and techniques often associated with