diff --git a/packages/learning/src/routing-optimizer/index.ts b/packages/learning/src/routing-optimizer/index.ts
index 8d6b02b..eb77f88 100644
--- a/packages/learning/src/routing-optimizer/index.ts
+++ b/packages/learning/src/routing-optimizer/index.ts
@@ -99,7 +99,7 @@ async function aggregateMetrics(lookbackHours = 168): Promise<ModelMetrics[]> {
        AVG(confidence)::float AS avg_confidence,
        PERCENTILE_CONT(0.95) WITHIN GROUP (ORDER BY latency_ms)::int AS p95_latency_ms,
        AVG(latency_ms)::float AS avg_latency_ms,
-       AVG(CASE WHEN validation_passed THEN 1.0 ELSE 0.0 END)::float AS success_rate,
+       AVG(CASE WHEN status = 'approved' THEN 1.0 ELSE 0.0 END)::float AS success_rate,
        COUNT(*)::int AS total_calls
      FROM routing_metrics
      WHERE recorded_at > now() - interval '${lookbackHours} hours'