{
  "title": "Tile and terrazzo surface observation data for AI",
  "source_page": "https://fiund.com/industries/tile-terrazzo-surface-observation-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "A shadow comparison is not a surface measurement",
    "context": "A small owned mock-up has separate tile and terrazzo practice surfaces. Fictional joint measurements and two lighting views distinguish appearance from recorded measurement.",
    "records": [
      [
        "TT1",
        "Tile joint T1 views",
        "An oblique image shows a dark edge; a frontal view of the same labeled T1 shows a much weaker band."
      ],
      [
        "TT2",
        "Independent practice observation",
        "Reviewer records T1 height difference as 1 arbitrary unit, with method M. No acceptance threshold supplied."
      ],
      [
        "TT3",
        "Terrazzo joint Z1 image",
        "Similar dark band visible at Z1. No measurement or method is attached."
      ]
    ],
    "question": "What quantitative statement is supported for T1, and can the model assign the same measurement to visually similar Z1?",
    "answer": "TT2 supports a recorded T1 height difference of 1 arbitrary unit under method M. TT1 shows that its dark-edge appearance changes with view, so band intensity is not itself the measurement. TT3 supports a visual dark band at Z1 but supplies no quantitative observation. Similar appearance does not justify transferring T1's value, method or any acceptance conclusion to the separate terrazzo joint.",
    "failureModes": [
      "Estimating a measured height from shadow darkness without an established method.",
      "Transferring a tile-joint result to a separately identified terrazzo joint."
    ],
    "fields": [
      [
        "Surface type and joint identity",
        "Keeps tile and terrazzo observations distinct."
      ],
      [
        "View and light conditions",
        "Preserves the context affecting apparent relief."
      ],
      [
        "Independent value, unit and method",
        "Separates a measurement from image interpretation."
      ]
    ],
    "holdout": "Provide Z1's independent measurement with a different unit and method. Require explicit comparability checks before ranking the two joints numerically.",
    "boundary": "Use approved small mock-ups and cleared images. Exclude client designs, project locations, people, proprietary installation data, cutting and live work."
  }
}