The dynamic changes of customer requirements for sustainable design over time in quality function deployment

The increased awareness and concern over sustainable issues made it important for designers to adopt changes that occur over time to fulfill future customer requirements. Current works in this field do not deal with changes in customer requirements over time towards sustainable design. There is, however, a need to develop a new more flexible method that could integrate sustainable requirements into the sustainable design as well as forecast changes in customer requirements for sustainable design. The main contribution of this research is developing a new method. This method used dynamic quality function deployment for sustainability (dynamic QFDS) to model changes in customer requirements for sustainable design over time. The future forecasting shows how customers are becoming much more aware of sustainable requirements and it also proves that on a yearly basis, customer requirements are increasingly shifting towards sustainable design.