Seeyall, Rahmatullah, Iftikhar Hussain, Waheed Ullah Hafiz, and Barialai Mohammadi. “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 3, no. 4 (December 31, 2025): 191–210. Accessed December 31, 2025. https://kujnsr.com/JNSR/article/view/260.