{
  "schema_version": "1.0.0",
  "model_version": "2026-09-12.1",
  "status": "synthetic_teaching_data",
  "language": "en",
  "workshop": "evidence",
  "title": "Evidence of performance",
  "assumptions": "Coefficients and aggregate standard uncertainty are supplied in the exercise. S ± 1.96u assumes a suitable normal approximation. It does not replace residual, covariance, missing-data and model-fitness analysis. JSON contains the six original teaching months; changing fields does not refit the model.",
  "inputs": {
    "months": {
      "value": 6,
      "unit": "",
      "description": "Number of months"
    },
    "intercept": {
      "value": 400,
      "unit": "kWh/month",
      "description": "Monthly intercept"
    },
    "weather": {
      "value": 12,
      "unit": "kWh/HDD",
      "description": "Weather coefficient"
    },
    "hdd": {
      "value": 1200,
      "unit": "HDD",
      "description": "Total heating degree-days"
    },
    "dayCoef": {
      "value": 80,
      "unit": "kWh/day",
      "description": "Operating-day coefficient"
    },
    "days": {
      "value": 120,
      "unit": "day",
      "description": "Total operating days"
    },
    "actual": {
      "value": 21000,
      "unit": "kWh",
      "description": "Measured consumption"
    },
    "uncertainty": {
      "value": 1200,
      "unit": "kWh",
      "description": "Standard uncertainty of savings"
    }
  },
  "reporting_months": [
    {
      "month": 1,
      "heating_degree_days": 350,
      "operating_days": 20,
      "baseline_kwh": 6200,
      "measured_kwh": 5000
    },
    {
      "month": 2,
      "heating_degree_days": 300,
      "operating_days": 20,
      "baseline_kwh": 5600,
      "measured_kwh": 4500
    },
    {
      "month": 3,
      "heating_degree_days": 250,
      "operating_days": 20,
      "baseline_kwh": 5000,
      "measured_kwh": 4000
    },
    {
      "month": 4,
      "heating_degree_days": 150,
      "operating_days": 20,
      "baseline_kwh": 3800,
      "measured_kwh": 3000
    },
    {
      "month": 5,
      "heating_degree_days": 100,
      "operating_days": 20,
      "baseline_kwh": 3200,
      "measured_kwh": 2500
    },
    {
      "month": 6,
      "heating_degree_days": 50,
      "operating_days": 20,
      "baseline_kwh": 2600,
      "measured_kwh": 2000
    }
  ]
}