Heru Ambrose Sinaga, et al. “Development of an Integrated Quality Control Model for Outer Gear Couplings Based on Six Sigma DMAIC and J48 Decision Tree”. RESWARA: Jurnal Riset Ilmu Teknik, vol. 4, no. 3, July 2026, pp. 307-25, https://doi.org/10.70716/reswara.v4i3.570.