Intermittent Handover Failures — Statistical Analysis

Over the past week, cluster DOWNTOWN-WEST has shown a slight but growing HO success rate degradation: from 97.5% last month to 94.1% this week. No single cell or time is an obvious culprit — the operator's dashboard just shows a slow slide. You have 3 days of handover event logs (~800 events) including both successful and failed HOs. Dig into the statistics: find which target cell dominates the failures, which time-of-day window they cluster in, and what the `cause` field tells you. Useful filters: `FAIL`, `outcome=FAIL`, `tgt=gNB-DTW-014`.