1. Quality Function Deployment: Integrating Customer Requirements into Product Design;Akao,2004
2. Amini, P., Falk, B., Hoth, N. C. & Schmitt, R. H., 2016. Statistical analysis of consumer perceived value deviation. 3rd ICRM 2016 International Conference on Ramp-Up Management. Aachen, Germany.
3. An integrated approch to concept evaluation in a new product development;Ayag;Journal of Intelligent Manufacturing,2016
4. Kano's methods for understanding customer-defined quality;Berger;Center for Quality Management Journal,1993
5. Bergman, B. & Klefsjo, B. (2011) Quality: From customer needs to customer satisfaction, Studentlitteratur.