Predictive Routing Metric Discrepancy in Queue Analytics

Is there a clean way to interpret the predictive routing success rate when the Agent Performance dashboard shows a significant deviation from the actual handle time? The environment is Genesys Cloud EU1 with Architect v2023.3. The queue is configured for predictive routing, yet the analytics report a 15% gap in answered calls versus the predicted volume. How should this metric be reconciled for business reporting?