This read-only object reports the progress of an in-flight firmware update: 0 means nothing is pending, 1-100 is a percentage complete, 101 means success, and any value above 200 indicates failure. An admin polls this object during an update to track progress or detect failure, rather than assuming the operation succeeded once triggered. An admin watching this object climb from 10 to 90 during an update, then land on 101, would confirm the firmware installation completed successfully; a value like 204 instead would signal a specific failure to investigate.