{
  "title": "Construction sand and gravel fraction records for AI",
  "source_page": "https://fiund.com/industries/construction-sand-gravel-fraction-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "A parent aggregate does not label every separated fraction",
    "context": "This invented sand-and-gravel packet uses two practice fractions and a combined parent record. The quantities are arbitrary and provide no evidence that a material meets a construction specification.",
    "records": [
      [
        "SG1",
        "Practice separation ledger",
        "Parent S-10 contains fractions S-10-A and S-10-B."
      ],
      [
        "SG2",
        "Reviewed fictional result",
        "S-10-A has score 7 units under test T; S-10-B has no individual score."
      ],
      [
        "SG3",
        "Combined parent summary",
        "S-10 reports 12 units for the combined sample. A separate entry lists 5 percent without a fraction identity."
      ]
    ],
    "question": "What score is directly supported for each fraction, and can the parent total or unassigned percent fill B's missing result?",
    "answer": "SG2 directly supports a test-T score of 7 units for S-10-A. No individual score for S-10-B is supplied. SG3's combined value is not an attribution rule, and the packet does not state that scores are additive. Subtracting 7 from 12 would invent B's result. The unassigned 5 percent has neither compatible units nor a verified fraction link.",
    "failureModes": [
      "Deriving B=5 from a parent score without an additivity rule.",
      "Treating 5 percent as 5 test units and assigning it to B."
    ],
    "fields": [
      [
        "Parent and fraction IDs",
        "Preserves the separation relationship."
      ],
      [
        "Individual versus combined scope",
        "Distinguishes a measured fraction from a parent summary."
      ],
      [
        "Measure definition and unit",
        "Identifies whether arithmetic is meaningful."
      ],
      [
        "Reviewer assignment",
        "Records which result was actually checked for which fraction."
      ]
    ],
    "holdout": "Provide an explicitly additive mass inventory with matching units and all but one component. Compare whether the model can calculate a remainder there while declining to infer a nonadditive test score here.",
    "boundary": "Keep real quality records, plant data, customer specifications, pricing and locations out of the exercise. No acceptance or engineering conclusion is requested."
  }
}