This read-write integer object specifies the frame-loss ratio, as a percentage, at which this FlowPoint begins counting Severely Errored Seconds (SES), applicable only when the flow point is monitored using Y.1731 Ethernet Service Assurance (ESA) functionality. An administrator tunes this threshold to control the sensitivity of SES reporting for SLA measurement on this specific flow. For example, setting this ratio lower makes the flow point declare an SES on smaller amounts of frame loss, tightening the criteria used for SLA-violation reporting on that service.