China Unicom China Unicom CNIC CAS China Unicom This document describes the framework and considerations for fallback decision-making in Computing-Aware Traffic Steering (CATS). While existing OAM frameworks provide multi-dimensional telemetry collection capabilities, how the CATS Path Selector (C-PS) should react to partial or transient failures remains an open issue. This document highlights the problems of misjudgment due to correlated failures, steering flapping, and non-deterministic fallback behaviors. It outlines the high-level considerations for logical decoupling of status dimensions and stable state transition mechanisms to ensure carrier-grade reliability. Specific protocol extensions and algorithm implementations will be explored in future revisions based on working group discussions.