{
  "title": "Plastic profile data for AI cross-section and reference-face checks",
  "source_page": "https://fiund.com/industries/plastic-profile-cut-reference-face-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "Two lengths taken from opposite faces",
    "context": "The contributor draws original stepped profiles. A mock cut record uses offsets measured from a marked face.",
    "records": [
      [
        "1",
        "Drawing",
        "Feature F at 12 mm from marked face on a profile 30 mm wide."
      ],
      [
        "2",
        "Cut sheet",
        "F recorded 18 mm from unmarked face, on the same axis."
      ],
      [
        "3",
        "Photo",
        "Marked face and F visible; no independent scale in image."
      ]
    ],
    "question": "Do the coordinates necessarily conflict?",
    "answer": "No. With the same width and axis in records 1 and 2, 30 − 18 gives 12 mm from the marked face. Record 3 supports the identity of the reference feature but cannot independently quantify the distance. Retain the original coordinate origins.",
    "failureModes": [
      "Comparing offsets without transforming their origins",
      "Using an unscaled photo as a dimensional measurement"
    ],
    "fields": [
      [
        "reference_face",
        "Defines coordinate origin"
      ],
      [
        "measurement_axis",
        "Ensures the offsets share a line"
      ],
      [
        "profile_width_mm",
        "Allows conversion between opposite origins"
      ]
    ],
    "holdout": "Change the second record to a different width variant; require confirming the actual width before transforming its offset.",
    "boundary": "No proprietary extrusion profiles, machine setups or actual cutting tolerances."
  }
}