The Quality Control Analysis of Hard Solder Assembly (HSA) of Key Flutes Using the Six Sigma DMAIC Method (Case Study: PT. Yamaha Musical Products Indonesia). Journal of Industrial Engineering and Halal Industries, [S. l.], v. 7, n. 1, p. 25–29, 2026. DOI: 10.14421/jiehis.6126. Disponível em: https://ejournal.uin-suka.ac.id/saintek/JIEHIS/article/view/6126. Acesso em: 5 jul. 2026.