Gasni, D. et al. 2026. Design and Testing of Twin-Disk Friction Torque Test Rig Using Quality Function Deployment and Function Analysis Methods Approach. METAL: Jurnal Sistem Mekanik dan Termal. 10, 1 (May 2026), 16–27. DOI:https://doi.org/10.25077/metal.10.1.16-27.2026.