Source: https://guthlabs.ai/docs/instruments/moving-box-truck-size-estimator/implementation/

instrument implementation / implementation-contract

# Moving Box / Truck Size Estimator implementation

A source-bound implementation contract for Moving Box / Truck Size Estimator; deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## 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

[01**Overview**](<https://guthlabs.ai/docs/instruments/moving-box-truck-size-estimator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/moving-box-truck-size-estimator/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/moving-box-truck-size-estimator/qualification/>)

## 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`