There is no single, right definition for QFD; this one captures its essential meaning:

“A system for translating customer requirements into appropriate company requirements at each stage from research and product development to engineering and manufacturing to marketing/sales and distribution”

The example below shows how to make a Quality Function Deployment (QFD) also known as House of Quality. In the given example, we are studying the various voices while purchasing a Air Conditioner and then looking into the CTx’s