The 'operability' property, typed CucsEquipmentOperability, reports the health rollup of this server -- operable, inoperable, or degraded -- derived from its active faults. This is the field an admin scans across the whole fleet to quickly spot which specific physical servers have hardware problems severe enough to affect their usability, distinct from configuration-related operState issues. A blade with a failed DIMM would report operability as `degraded`, while one with multiple critical hardware faults might report `inoperable`.