A computer-implemented method to processes issue data in a system. A plurality of issue reports are received from respective reporting entities, each issue report being in respect of a system issue which requires a response activity. The issue reports are parsed to obtain priority criterion data relating to at least one priority criterion. The priority criterion is unrelated to the dates and/or times of the issue reports and may include visibility data, severity data, exposure data, and performance data relating to past performance of a reporting entity or a reported entity. The reported issues are then prioritized for order of response based at least partially on the associated criterion data.