Measuring Six Sigma Key Criteria for Success in Institutions of Higher Learning: Development and Testing Verification Tool. Journal of Pharmaceutical Negative Results, [S. l.], v. 13, n. 4, p. 1592–1598, 2022. DOI: 10.47750/pnr.2022.13.04.222. Disponível em: https://pnrjournal.com/index.php/home/article/view/5191.. Acesso em: 5 jun. 2026.