Sort Monitoring Signals by Failure Layer

Sort the signals by the failure layer they primarily diagnose. Data signal Model signal Service signal Business signal Feature freshness lag exceeds 20 minutes Prediction score distribution compresses near 0.50 P99 inference latency breaches 300 ms Manual-review queue grows 40 percent above normal Null rate for account_age feature doubles Calibration proxy deviates for returning customers GPU memory saturation hits 92 percent Checkout abandonment rises in the model-treated cohort

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