This paper reports on a collaboratively developed user interface. The user interface has been coded as a Microsoft Windows-based and user-friendly computer software system using the Quality Function Deployment (QFD) method and linear programming technique. By using the user interface, a product development team can rapidly specify a product to meet customer requirements and needs, and optimally allocate the team members'time to achieve the various technical features of the defined product so that maximum overall customer satisfaction is achieved. This paper uses an industrial case to illustrate the basic principles behind the user interface and the industrial implementation results are discussed.