{
  "nature": "original fictional teaching case",
  "currency": "CNY",
  "budget_cap": 20000,
  "score_range": [1, 5],
  "higher_is_better": true,
  "options": [
    {"id": "A", "price": 12000, "quality": 3, "speed": 5, "cost": 5},
    {"id": "B", "price": 18000, "quality": 5, "speed": 3, "cost": 3},
    {"id": "C", "price": 26000, "quality": 5, "speed": 5, "cost": 1}
  ],
  "weight_scenarios": [
    {"quality": 0.4, "speed": 0.3, "cost": 0.3},
    {"quality": 0.5, "speed": 0.25, "cost": 0.25},
    {"quality": 0.6, "speed": 0.2, "cost": 0.2}
  ],
  "cost_score_rubric_cny": {"5": "price <= 12000", "3": "12000 < price <= 20000", "1": "price > 20000; independently fails budget gate"},
  "quality_score_rubric": {"3": "mandatory criteria passed, revisions needed", "5": "mandatory and predeclared extension criteria passed"},
  "speed_score_rubric": {"5": "meets desired delivery window", "3": "meets final deadline but misses desired window"}
}