This read-write integer object specifies the frame-loss ratio, as a percentage, at which this OAMFlowPoint begins counting Severely Errored Seconds (SES), applicable only when the OAM flow point is monitored using Y.1731 Ethernet Service Assurance (ESA) functionality. An administrator tunes this threshold to control how sensitive SES reporting is for OAM-based SLA measurement on the monitored circuit. For example, setting this threshold tighter on a premium circuit's OAM flow point makes even small amounts of frame loss trigger SES counting for stricter SLA compliance tracking.