Abstract
This research was initiated by a desire to prove the sceptical views about the benefits of ISO 9000 in manufacturing industries, especially in Indonesia. This study was conducted by examining financial performance through basic financial assessment ratio standards of 27 listed manufacturing companies in the Indonesian Stock Exchange, at the stage prior to the ISO 9000 implementation, at the stage of efforts of implementation and at the stage of three years after the implementation. The first test, using McNemar’s test, shows that there was no significant impact of ISO 9000 towards the financial performance before and after the implementation. However, the second test, using Cochran’s Q, shows that all sample companies with more consistency became more efficient and faster, hence increasing financial performance, even though speed and quantity varied in each sample, and vice versa.