{
  "title": "Roll-forming data for AI profile and bend-reference review",
  "source_page": "https://fiund.com/industries/roll-formed-profile-bend-reference-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "A rotated section has the same flange relationship",
    "context": "An original paper open-channel section has unequal flanges. Reference marks define which face is which.",
    "records": [
      [
        "1",
        "Section drawing",
        "Circle side has short flange; square side has long flange."
      ],
      [
        "2",
        "Image A",
        "Circle on image-left, short flange left."
      ],
      [
        "3",
        "Image B",
        "Prop rotated; circle on image-right, short flange right."
      ]
    ],
    "question": "Is there a flange reversal across the two images?",
    "answer": "No. The short flange remains attached to the circle side in both images, consistent with record 1. Only the frame orientation changes. Record the persistent short-to-circle relationship rather than using absolute screen position as a shape mismatch signal.",
    "failureModes": [
      "Flagging a rotation as a fabricated reversal",
      "Calling the left flange short without its marker"
    ],
    "fields": [
      [
        "face_marker",
        "Anchors local side identity"
      ],
      [
        "flange_relative_length",
        "Compares short and long on that frame"
      ],
      [
        "capture_rotation",
        "Explains changed pixel positions"
      ]
    ],
    "holdout": "Use a correct rotation plus a genuine long flange on the circle side; retain the real feature mismatch.",
    "boundary": "No commercial profile dimensions, structural design, tooling or fabrication instructions."
  }
}