{
  "dataset_id": "quotation-quantity-examples",
  "version": "1.0.0",
  "description": "Eight labelled geometry examples showing how different measurement bases produce quantities. Illustrative arithmetic, not prices, observed homes, universal quoting conventions or manufacturing dimensions.",
  "method": "Deterministic formulas; inputs are labelled examples or unit definitions. Results serialized to at most 12 decimal places. No measured sample.",
  "source": {
    "id": "NIST-LENGTH",
    "title": "SI Units - Length",
    "publisher": "National Institute of Standards and Technology",
    "url": "https://www.nist.gov/pml/owm/si-units-length",
    "accessed_at": "2026-09-06",
    "supports": "The inch is exactly 25.4 mm; metric length relations and the distinction between length, area and volume.",
    "does_not_support": "Furniture size recommendations, installation clearances, prices, tolerances, measured projects or contractual measurement rules."
  },
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "records": [
    {
      "id": "QTY-001",
      "context": "Example rectangular wardrobe front, width 8 ft and height 7 ft",
      "operation": "area",
      "inputs": [
        8,
        7
      ],
      "unit": "sq_ft",
      "limitation": "One front face only; not board consumption, full cabinet cost or an approved wardrobe size.",
      "result": 56,
      "formula": "width_ft * depth_or_height_ft",
      "evidence_grade": "D",
      "claim_type": "transparent_calculation",
      "source_url": "https://www.nist.gov/pml/owm/si-units-length",
      "reviewed_at": "2026-09-06"
    },
    {
      "id": "QTY-002",
      "context": "Example wall 10 by 8 ft with a 3 by 7 ft opening deducted",
      "operation": "net_area",
      "inputs": [
        10,
        8,
        3,
        7
      ],
      "unit": "sq_ft",
      "limitation": "Deduction is an explicit example assumption; supplier deduction and wastage rules require agreement.",
      "result": 59,
      "formula": "wall_width_ft * wall_height_ft - opening_width_ft * opening_height_ft",
      "evidence_grade": "D",
      "claim_type": "transparent_calculation",
      "source_url": "https://www.nist.gov/pml/owm/si-units-length",
      "reviewed_at": "2026-09-06"
    },
    {
      "id": "QTY-003",
      "context": "Example straight counter 10 ft long and 2 ft deep",
      "operation": "area",
      "inputs": [
        10,
        2
      ],
      "unit": "sq_ft",
      "limitation": "Surface area is not the same quantity as 10 running feet; no rate conversion without matching scope.",
      "result": 20,
      "formula": "width_ft * depth_or_height_ft",
      "evidence_grade": "D",
      "claim_type": "transparent_calculation",
      "source_url": "https://www.nist.gov/pml/owm/si-units-length",
      "reviewed_at": "2026-09-06"
    },
    {
      "id": "QTY-004",
      "context": "Example L-shaped counter: 8 ft and 6 ft runs, both 2 ft deep, with a 2 by 2 ft overlap",
      "operation": "l_area",
      "inputs": [
        8,
        6,
        2
      ],
      "unit": "sq_ft",
      "limitation": "Subtract overlap only when both measured runs include this same corner; not a universal shop-billing method.",
      "result": 24,
      "formula": "(run_a_ft + run_b_ft) * depth_ft - depth_ft^2",
      "evidence_grade": "D",
      "claim_type": "transparent_calculation",
      "source_url": "https://www.nist.gov/pml/owm/si-units-length",
      "reviewed_at": "2026-09-06"
    },
    {
      "id": "QTY-005",
      "context": "Example external cabinet width 600 mm with two 18 mm sides",
      "operation": "clear_width",
      "inputs": [
        600,
        18
      ],
      "unit": "mm",
      "limitation": "Arithmetic opening only; hardware, grooves, back construction and clearance requirements are not included.",
      "result": 564,
      "formula": "external_width_mm - 2 * side_thickness_mm",
      "evidence_grade": "D",
      "claim_type": "transparent_calculation",
      "source_url": "https://www.nist.gov/pml/owm/si-units-length",
      "reviewed_at": "2026-09-06"
    },
    {
      "id": "QTY-006",
      "context": "Example room width 3048 mm minus a 1828.8 mm mattress width",
      "operation": "difference",
      "inputs": [
        3048,
        1828.8
      ],
      "unit": "mm",
      "limitation": "Total residual width, not clearance on each side; bed frame, furniture and circulation are not deducted.",
      "result": 1219.2,
      "formula": "room_width_mm - mattress_width_mm",
      "evidence_grade": "D",
      "claim_type": "transparent_calculation",
      "source_url": "https://www.nist.gov/pml/owm/si-units-length",
      "reviewed_at": "2026-09-06"
    },
    {
      "id": "QTY-007",
      "context": "Example rectangular timber stock 2 ft by 0.25 ft by 0.125 ft",
      "operation": "volume",
      "inputs": [
        2,
        0.25,
        0.125
      ],
      "unit": "cu_ft",
      "limitation": "Illustrative rectangular volume, not a timber grade, payable quantity or allowance for machining.",
      "result": 0.0625,
      "formula": "length_ft * width_ft * thickness_ft",
      "evidence_grade": "D",
      "claim_type": "transparent_calculation",
      "source_url": "https://www.nist.gov/pml/owm/si-units-length",
      "reviewed_at": "2026-09-06"
    },
    {
      "id": "QTY-008",
      "context": "Example front 48 inches wide by 84 inches high converted to square feet",
      "operation": "inch_area_sqft",
      "inputs": [
        48,
        84
      ],
      "unit": "sq_ft",
      "limitation": "Example face area; it does not establish shutter count or complete-unit scope.",
      "result": 28,
      "formula": "width_inches * height_inches / 144",
      "evidence_grade": "D",
      "claim_type": "transparent_calculation",
      "source_url": "https://www.nist.gov/pml/owm/si-units-length",
      "reviewed_at": "2026-09-06"
    }
  ]
}