WORLDAILMI, E. Productivity Analysis in the Production Process Using the Six Sigma Method (Case Study at the XSMK Company). Journal of Industrial Engineering and Halal Industries, [S. l.], v. 3, n. 2, p. 106–113, 2023. DOI: 10.14421/jiehis.3783. Disponível em: https://ejournal.uin-suka.ac.id/saintek/JIEHIS/article/view/3783. Acesso em: 19 jan. 2025.