Review of results from the use of the six sigma methodology: case of metal-mechanical companies. Revista Semilleros de Investigación, [S. l.], v. 6, n. 1, p. 24–35, 2023. DOI: 10.24054/sei.v6i1.3709. Disponível em: https://ojs.unipamplona.edu.co/index.php/seminve/article/view/3709. Acesso em: 16 oct. 2025.