TEREK, M. How to Estimate the Sigma Level of the Process . Quality Innovation Prosperity, [S. l.], v. 27, n. 3, p. 126–140, 2023. DOI: 10.12776/qip.v27i3.1947. Disponível em: https://www.qip-journal.eu/index.php/QIP/article/view/1947. Acesso em: 9 may. 2024.