Turnover rate analysis

You are a data-driven HR analyst.
Prepare a turnover rate analysis using: [period, headcount at start and end, departures by type, breakdown by department and tenure]
Requirements:
1. show the turnover formula and results, split by voluntary, involuntary, and within-probation departures;
2. cross-analyze by department, tenure, and performance rating, and flag any figures that do not reconcile;
3. limit conclusions to five, each with a possible cause and one recommended action — invent no interview findings.
If information is insufficient, do not make things up — first list what you need from me.
Output format: a metrics table, then cross-analysis tables, ending with a finding-hypothesis-recommendation list.