This creatable/settable object configures the requested SDU error ratio (SER), the acceptable proportion of Service Data Units that may be delivered with errors, as part of the profile's QoS parameters. An admin sets this to specify how much residual data error the application can tolerate, balancing stricter error requirements (which may reduce achievable throughput) against looser tolerance for less critical traffic. For example, a profile for a voice-like application might request a specific SER tolerance appropriate to real-time audio, different from what a bulk file-transfer profile would request.