SEEYALL, R.; HUSSAIN, I.; NAIMZAD, A.; MOHAMMADI, B.; HAFIZ, W. U. Adoption and Impact of Six Sigma Methodology on Operational Efficiency in Afghanistan with a Focus on Food and Medicine Industry. Journal of Natural Science Review , [S. l.], v. 3, n. 4, p. 191–210, 2025. DOI: 10.62810/jnsr.v3i4.260. Disponível em: https://kujnsr.com/JNSR/article/view/260. Acesso em: 20 feb. 2026.