{
  "title": "Ambulance arrival and transfer timestamp data for AI",
  "source_page": "https://fiund.com/industries/ambulance-handoff-clock-basis-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "Arrival and receiving-team acknowledgment are separate timeline events",
    "context": "A fictional trip uses abstract time cards and no patient, dispatch location, clinical event or actual response performance. The clock offset is an explicit property of the invented fixture.",
    "records": [
      [
        "AT1",
        "Vehicle clock",
        "Trip A arrival recorded 10:02 on vehicle clock. Approved mock clock card says vehicle clock is two minutes ahead of reference time."
      ],
      [
        "AT2",
        "Receiving acknowledgment",
        "Trip A receiving-team acknowledgment at 10:08 reference time, exact trip link supplied."
      ],
      [
        "AT3",
        "Trip B",
        "Arrival 11:00 reference time. Scheduled handoff 11:05, but no receiving acknowledgment or completed transfer event supplied."
      ]
    ],
    "question": "What arrival-to-acknowledgment interval is supported for A, and can B's interval be calculated from its scheduled handoff?",
    "answer": "AT1 converts A's vehicle-clock arrival to 10:00 reference time. AT2 then supports eight minutes from arrival to receiving acknowledgment at 10:08. B's scheduled 11:05 handoff in AT3 is not a completed acknowledgment, so its corresponding interval remains unresolved. Preserve event names, trip identity and time basis; this synthetic interval does not establish clinical transfer quality or actual ambulance performance.",
    "failureModes": [
      "Subtracting timestamps from different clocks without the documented conversion.",
      "Using a scheduled handoff as a receiving acknowledgment or treating arrival as the transfer event."
    ],
    "fields": [
      [
        "Trip and event type",
        "Separates arrival from acknowledgment."
      ],
      [
        "Clock source and offset evidence",
        "Supports conversion."
      ],
      [
        "Reference timestamp and missing event",
        "Makes the interval reproducible or explicitly unresolved."
      ]
    ],
    "holdout": "Remove A's approved clock-offset card. Require the exact interval to become uncertain rather than assume synchronized clocks.",
    "boundary": "Use original fictional cards. Exclude emergency recordings, patient data, live locations and operational details; real time elements need authorized source review."
  }
}