{
  "substudy_name": "fine_tuning",
  "description": "Fine-grained optimization with 50 trials in narrow bounds around best design from coarse exploration",
  "parent_study": "bracket_displacement_maximizing",
  "created_date": "2025-11-16",

  "optimization": {
    "algorithm": "TPE",
    "direction": "minimize",
    "n_trials": 50,
    "n_startup_trials": 5,
    "design_variables": [
      {
        "parameter": "tip_thickness",
        "min": 18.0,
        "max": 22.0,
        "units": "mm",
        "comment": "Narrowed from coarse_exploration results"
      },
      {
        "parameter": "support_angle",
        "min": 28.0,
        "max": 35.0,
        "units": "degrees",
        "comment": "Narrowed from coarse_exploration results"
      }
    ]
  },

  "continuation": {
    "enabled": true,
    "from_substudy": "coarse_exploration",
    "inherit_best_params": true,
    "comment": "Start from best design found in coarse exploration"
  }
}