Expense variance triage: controllable vs noncontrollable

Triage operating expense variances for {period}.

Inputs:
- Opex detail by cost center: {opex_detail}
- Budget/forecast: {opex_budget}
- Policy notes (e.g., travel freeze): {policy_notes}
- Thresholds: {thresholds}

Output:
1) Variance table with controllable vs noncontrollable classification.
2) Owner-specific follow-up questions (max 5 per owner).
3) Suggested reforecast adjustments and one-time vs run-rate separation.
4) Controls/process suggestions if recurring issues are found.

Keep it actionable and respectful in tone.