Mukafi, Muhamad, and Ahmad Dzulfikri. “Design of Walking and Sitting Aids for the Elderly Using the Kano Method”. Operations Excellence: Journal of Applied Industrial Engineering 15, no. 1 (August 5, 2023): 29–40. Accessed June 3, 2026. https://publikasi.mercubuana.ac.id/index.php/oe/article/view/17658.