내부회계관리제도와 회계정보의 신뢰성

Internal control system requires companies to spend large amount of money and time. Important issue is to confirm if external auditing is performing efficiently. If efficiency of internal auditing is suspicious, legislation which extending small and medium business size should be reviewed and revised. In this research, effectiveness of internal control system has reviewed with observing improvements of accounting information a year before and after to internal control system adoption. Also, extended research has covered to internal control system by external auditor to its trust level. As the result shows, it is estimated increase trust level of accounting information due to reduction of discretionary accruals. It suggests the effectiveness of adopting internal control system. Also, we estimated that the opinion of internal control system is not related with reliability of accounting information. But the higher firms earning management of CEOs are, the higher qualified opinions of auditing opinion on the internal control system are reported. The result of this research is expected to find judgmental factors if investigating opinion of internal control system have information usability and effectiveness of adopting internal control system. In Korea, reviewing internal control system has obligated since late 2005, there are lack of thoughtful research in this area. Anticipated to motivate more researches with the result of this research.