A system inhibits alert monitoring during a predefined time period such as system maintenance by suppressing automatic communication of false alert messages to systems, on call personnel and availability reports and enables future scheduling of planned maintenance events, as well as real-time suppression of alerting during a chosen period. A system supports maintenance of one or more processing devices. The system includes a display processor for initiating generation of data representing at least one display image enabling a user to, select a processing device from multiple different processing devices intermittently receiving maintenance and schedule a time period for suppression of communication of alert messages indicating a failure condition of the selected processing device.