Butdee, S. and Trakunsaranakom, C. (2013) “QFDE Combined with TRIZ Framework to Formulate and Respond to Functional Design for a High Temperature Machine (HTM)”, Applied Science and Engineering Progress, 3(4), pp. 77–84. available at: https://ph02.tci-thaijo.org/index.php/ijast/article/view/67393 (accessed: 18 September 2026).