{
  "title": "Power train manufacturing data for AI build and ratio records",
  "source_page": "https://fiund.com/industries/powertrain-gearset-build-ratio-record-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "A planned ratio and an observed ratio must keep their basis",
    "context": "Invented gearset cards use symbolic configuration and toy turn counts. There is no real powertrain design or setup.",
    "records": [
      [
        "1",
        "Issued list",
        "Build U5 planned gearset A; record ratio as input turns per output turn."
      ],
      [
        "2",
        "Completed record",
        "U5 logged with gearset B."
      ],
      [
        "3",
        "Toy observation",
        "U5 input 15 turns and output 5 turns in the same interval."
      ]
    ],
    "question": "What can the record say about the completed ratio and variant?",
    "answer": "U5 has a recorded gearset B, differing from the issued A. The paired counts in record 3 give 3 input turns per output turn under record 1's convention. Keep the measured ratio with the completed build; do not use it to infer A's behavior.",
    "failureModes": [
      "Attaching the observed ratio to the planned gearset",
      "Reporting the reciprocal without naming its basis"
    ],
    "fields": [
      [
        "issued_gearset",
        "Represents plan"
      ],
      [
        "completed_gearset",
        "Identifies the observed build context"
      ],
      [
        "ratio_basis",
        "Preserves input and output roles"
      ]
    ],
    "holdout": "Provide a measurement captured before a documented replacement; associate it with the gearset installed at the time.",
    "boundary": "No actual gear designs, ratios for real vehicles, service instructions or performance claims."
  }
}