QFD – a Link Between Customer Requirements and Product Properties
                        Year: 2007
                        Author: Chahadi, Youssef; Martin, Wäldele; Birkhofer, Herbert
                        Series: ICED
                        Section: Theories and methodologies
                        Page(s): 711-712 (exec. Summ.), full paper no. DS42_P_357
                        
Keywords: QFD, standardised requirements, internal properties, external properties