In order to enhance the performance of trouble management in distribution system operations, information integration of SCADA and outage management systems was investigated. Using discrete event simulation techniques, three possible integration schemes were studied. This paper shows a thorough analysis of the system performance of integrated systems under realistic conditions. Test results have indicated that the integrated system, consisting of the two separate but related systems with connection through FDDI LAN, can maintain the performance requirement of each system, and at the same time enhance the overall performance of trouble management.