{
  "title": "Industrial fan performance data for AI test review",
  "source_page": "https://fiund.com/industries/industrial-fan-airflow-test-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "Inlet and outlet points need their own labels",
    "context": "Fictional fan readings use arbitrary quantities. The reviewer compares test points rather than operating equipment.",
    "records": [
      [
        "1",
        "Test request",
        "Setup S2, outlet point P3; retrieve air and pressure fields together."
      ],
      [
        "2",
        "Run A",
        "S2/P3 air 12, pressure 7, same timestamp."
      ],
      [
        "3",
        "Run B",
        "S2/P1 air 15, pressure 6; inlet location."
      ]
    ],
    "question": "Which paired observation answers the request?",
    "answer": "Return air 12 and pressure 7 together from record 2, which matches both setup and outlet point in record 1. Record 3 observes an inlet point, even though its setup matches. Do not create a hybrid pair from the two runs.",
    "failureModes": [
      "Choosing one field from each test point",
      "Dropping inlet-versus-outlet provenance"
    ],
    "fields": [
      [
        "setup_id",
        "Constrains the test arrangement"
      ],
      [
        "measurement_point",
        "Locates the reading"
      ],
      [
        "paired_observation_id",
        "Keeps simultaneous fields together"
      ]
    ],
    "holdout": "Give asynchronous air and pressure timestamps with a stated matching rule; reject a pair outside its window.",
    "boundary": "No actual fan curves, installation guidance, settings or equipment selection."
  }
}