A method, system, computer-readable medium, and computer-controlled apparatus are provided for logging and accessing diagnostic result messages. Diagnostic client modules transmit diagnostic result messages to a diagnostic event service module. The diagnostic event service module receives diagnostic result messages from the diagnostic client modules and relays the messages to diagnostic subscriber modules. Diagnostic subscriber modules may comprise a log writer module for storing the messages in a diagnostic results database or a progress viewer module for displaying an indication of the progress of a diagnostic test based on the diagnostic result messages. A query access layer module, a log viewer module, a report tools module, and a report server module may also be provided.