Moving Box / Truck Size Estimator implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t7-090

Effect

Computation or source lookup only

Input and validation requirements

The specification does not provide the required lookup-table values, validity rules, truck-size thresholds, or precedence when both home-size and itemized inputs are supplied. It also does not define rejection behavior for negative room counts or volume units, allowing nonsensical or materially different outputs.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "rooms": 2,
    "itemized_inventory": {
      "small_boxes": 20,
      "medium_boxes": 30,
      "large_boxes": 10,
      "other_items_volume_cuft": 80
    }
  },
  "expected_outputs": {
    "estimated_box_count": 50,
    "suggested_truck_size": "cargo van",
    "required_volume_cuft": 245,
    "truck_capacity_cuft": 245
  },
  "reference_data": {
    "box_rate_row": {
      "rooms": 2,
      "avg_boxes_per_room": 25,
      "source_convention": "widely tabulated standard value; rough moving-planning heuristic"
    },
    "moving_box_volume_rows": [
      {
        "box_type": "small/book",
        "volume_cuft": 1.5,
        "source_convention": "widely tabulated standard value; common nominal moving-box size"
      },
      {
        "box_type": "medium",
        "volume_cuft": 3,
        "source_convention": "widely tabulated standard value; common nominal moving-box size"
      },
      {
        "box_type": "large",
        "volume_cuft": 4.5,
        "source_convention": "widely tabulated standard value; common nominal moving-box size"
      }
    ],
    "truck_capacity_row": {
      "truck": "cargo van",
      "capacity_cuft": 245,
      "source_convention": "widely tabulated standard value; U-Haul-style published nominal cargo capacity"
    }
  },
  "working": "Boxes: 2 rooms × 25 boxes/room = 50 boxes. Volume: (20 × 1.5) + (30 × 3.0) + (10 × 4.5) + 80 = 30 + 90 + 45 + 80 = 245 cu ft. Truck lookup: 245 cu ft ≤ cargo-van capacity 245 cu ft, so select cargo van. This lands exactly on the 245-cu-ft truck table entry."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche7/tranche7-results.json