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The increasing difference in magnitude between modeled flows in Unit Dispatch System (UDS) and actual flows is resulting in System Operating Limit (SOL) violations, balancing issues and frequency deviations. Out-of-market actions by operators to address these issues are causing MISO to deviate from market design principles.   Multiple enhancements will be implemented to mitigate these issues.  The first, the Uninstructed Deviation Enhancement Flag, is scheduled for implementation in June 2025 and will apply to all Generation Resources (except Electric Storage Resources).  The flag provides additional clarity regarding the Setpoint Instruction to better support reliability.   

Issue Description updated 4/1/2025.