This aims to investigate factors influencing the effectiveness of the ISO 9000 quality management system of HCMC-based enterprises. There are 210 respondents who are workers and managers of HCMC-based companies using ISO 9000. Measurement scales are established upon seven factors: (1) managers? commitments, (2) roles of middle managers, (3) participation of employees, (4) internal information system, (5) collaboration of customers and providers, (6) professional consultants, and (7) quality management documents. Research findings indicate that the variable ?roles of middle managers? should be left out and the remainders, save for ?quality management documents?, have impacts on the effectiveness of the ISO 9000 quality management system. Additionally, some suggestions are also extended to enterprises which have employed or plan to employ ISO 9000 to boost the efficiency of their quality management system.
Factors; Efficiency; Quality Management; ISO 9000; Enterprises.