{
  "method": "sobol_jansen",
  "model": "GR4J",
  "variant": "LuMod 0.1.3.0 GR4J",
  "objective": "nse",
  "score_period": "training data after warmup only",
  "seed": 42,
  "base_samples": 1024,
  "bootstrap_replicates": 200,
  "evaluations": 6144,
  "parameters": [
    {
      "parameter": "x4",
      "bounds": [
        0.5,
        10.0
      ],
      "first_order": 0.638034077602855,
      "first_order_ci95": [
        0.6016698339323978,
        0.6696331587793818
      ],
      "total_order": 0.6759065798070953,
      "total_order_ci95": [
        0.6240606700170641,
        0.7336810922428691
      ],
      "first_order_estimator": "1 - mean((f(B) - f(A_Bi))^2) / (2 Var(Y))",
      "total_order_estimator": "mean((f(A) - f(A_Bi))^2) / (2 Var(Y))"
    },
    {
      "parameter": "x2",
      "bounds": [
        -5.0,
        5.0
      ],
      "first_order": 0.2304364401820742,
      "first_order_ci95": [
        0.17124436788746975,
        0.2853516849804674
      ],
      "total_order": 0.2573216406410986,
      "total_order_ci95": [
        0.23372673559446888,
        0.28905678672597723
      ],
      "first_order_estimator": "1 - mean((f(B) - f(A_Bi))^2) / (2 Var(Y))",
      "total_order_estimator": "mean((f(A) - f(A_Bi))^2) / (2 Var(Y))"
    },
    {
      "parameter": "x3",
      "bounds": [
        10.0,
        500.0
      ],
      "first_order": 0.00487671491004249,
      "first_order_ci95": [
        -0.07120509666311345,
        0.07387918992734246
      ],
      "total_order": 0.08970323494296588,
      "total_order_ci95": [
        0.06674954376064839,
        0.12277905621177407
      ],
      "first_order_estimator": "1 - mean((f(B) - f(A_Bi))^2) / (2 Var(Y))",
      "total_order_estimator": "mean((f(A) - f(A_Bi))^2) / (2 Var(Y))"
    },
    {
      "parameter": "x1",
      "bounds": [
        100.0,
        1500.0
      ],
      "first_order": 0.036147572528067995,
      "first_order_ci95": [
        -0.024696510334964443,
        0.09555144667475632
      ],
      "total_order": 0.06510193638434601,
      "total_order_ci95": [
        0.05335184632433783,
        0.07984374567248781
      ],
      "first_order_estimator": "1 - mean((f(B) - f(A_Bi))^2) / (2 Var(Y))",
      "total_order_estimator": "mean((f(A) - f(A_Bi))^2) / (2 Var(Y))"
    }
  ],
  "interpretation": "Variance-based global effects over the reported independent parameter bounds. Finite-sample first-order estimates may be negative or sum above one. Bootstrap intervals describe index sampling variability, not predictive uncertainty."
}