A study objective is to identify key factors of QMS (Quality Management System) influencing the organizational performance in pharmaceutical factories getting GMP (Good Manufacturing Practices) certificate. The original research model consists of eight independent factors (leadership, process management, education and training, supplier management, customer focus, employee involvement, product design, and continuous improvement) and three dependent factors related to organizational performance (productivity, product quality and customer satisfaction). | Factors of quality management system influencing organizational performance: A study of pharmaceutical factories getting GMP certificate in Vietnam