{
  "title": "Steel mill data for AI heat and test-report matching",
  "source_page": "https://fiund.com/industries/steel-heat-cast-test-chain-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "Follow the specimen through heat and cast identifiers",
    "context": "Invented steel records contain identity fields only. The exercise does not certify material.",
    "records": [
      [
        "1",
        "Cast ledger",
        "Heat H4 produced casts C11 and C12."
      ],
      [
        "2",
        "Specimen map",
        "Coupon S11 from C11 and S12 from C12."
      ],
      [
        "3",
        "Report index",
        "R9 names S12 and H4; no entry for S11."
      ]
    ],
    "question": "Which cast has a linked coupon report?",
    "answer": "C12 links to R9 through S12 in records 2 and 3. H4 in record 1 links both casts to the same heat but does not extend the specimen report to C11. C11's separate coupon has no linked report in this packet.",
    "failureModes": [
      "Using heat identity as specimen identity",
      "Assigning one coupon report to sibling casts without a declared scope"
    ],
    "fields": [
      [
        "heat_id",
        "Preserves the upstream production grouping"
      ],
      [
        "cast_id",
        "Separates intermediate child lots"
      ],
      [
        "coupon_id",
        "Determines report linkage at specimen level"
      ]
    ],
    "holdout": "Give a report expressly scoped to the whole heat and separately tag its sampled coupon; keep measured object and declared coverage distinct.",
    "boundary": "No authentic mill reports, metallurgy settings, structural properties or conformance claims."
  }
}