Abstract
ISO 9000 is an efficient quality system for the customer's confidence and satisfaction. Of late years, the revised edition of ISO 9000 quality management system may give lots of positive business values to companies running ISO 9000 system. Despite its tremendous popularity, there is some criticism against the effect and performance of ISO 9000 certification. This research explores the performances and effects of ISO 9000 quality system in small & medium size industrial companies. For this research, 202 companies certified by ISO 9000 standard and 67 companies not certified as contrast group were selected. The related data were collected by web-poll survey. The major analyses are focused on the effect and performance of the ISO 9000 certification, and we established various hypotheses to verify the effect and performance of quality system. Results of statistical analyses show that total performance of quality system is significantly different between certified companies and not certified.