Mendoza Mendoza, Adel. “Six Sigma Quality Control and Multivariate Capability Indicators to Assess Customer Service in a Mobile Phone Company”. Dimensión Empresarial 21, no. 3 (July 31, 2025). Accessed August 5, 2025. http://ojs.uac.edu.co/index.php/dimension-empresarial/article/view/3813.