{
  "operating": {
    "revenue": {"model": "volume_price"},
    "working_capital": {
      "model": "days",
      "ar_days": 60,
      "ap_days": 45,
      "inv_days": 70,
      "include_inventory": true
    },
    "da": {"model": "pct_revenue", "pct": 0.045},
    "capex": {"model": "pct_revenue", "pct": 0.065}
  }
}