ADAM, M. I., Mohammad, P. T. D. M., & Yahya, M. S. . (2022). Innovative Design of Practical Tools for Umrah Training by Using QFD and TRIZ. Research Progress in Mechanical and Manufacturing Engineering, 2(2), 64-71. https://penerbit.uthm.edu.my/periodicals/index.php/rpmme/article/view/3655