{
  "report_id": "f7-rag-eval-student-variant",
  "chapter": "07.03",
  "dataset": "support-rag-eval-student-2026-06",
  "cases": 120,
  "metrics": {
    "hit_at_5": 0.91,
    "mrr": 0.76,
    "groundedness": 0.88,
    "citation_acceptance": 0.85,
    "abstention_ok": 0.84,
    "answer_usefulness": 0.82,
    "long_tail_coverage": 0.68
  },
  "slices": [
    {
      "slice": "matricula",
      "cases": 36,
      "groundedness": 0.91,
      "citation_acceptance": 0.9
    },
    {
      "slice": "becas",
      "cases": 31,
      "groundedness": 0.86,
      "citation_acceptance": 0.84
    },
    {
      "slice": "soporte_tecnico",
      "cases": 29,
      "groundedness": 0.87,
      "citation_acceptance": 0.83
    },
    {
      "slice": "normativa_poco_frecuente",
      "cases": 24,
      "groundedness": 0.82,
      "citation_acceptance": 0.78
    }
  ],
  "known_limits": [
    "La variante debe quedar bloqueada o en revisión porque no sostiene citas ni abstención.",
    "Sirve para que el alumno vea que una métrica global aceptable no tapa un fallo de evidencia."
  ]
}