Sous-Vide Time & Temperature Lookup 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

t7-019

Effect

Computation or source lookup only

Input and validation requirements

The specification does not include the required Douglas Baldwin/USDA lookup data, valid thickness ranges, branch-selection rules, or unit requirements. Consequently, valid-looking inputs cannot produce verified numeric outputs, while boundary and extreme inputs require rejection rather than extrapolation.

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": {
    "protein_type": "chicken breast",
    "cut": "boneless whole-muscle breast",
    "thickness_mm": 20,
    "doneness_target": "fully cooked",
    "starting_temp": "refrigerated",
    "target_core_temp_C": 73.9
  },
  "expected_outputs": {
    "target_water_bath_temp_C": 73.9,
    "minimum_safe_time_min": 75,
    "doneness_description": "fully cooked poultry; endpoint corresponds to 165°F"
  },
  "reference_data": {
    "usda_poultry_endpoint": {
      "temperature_F": 165,
      "temperature_C": 73.9,
      "source_convention": "USDA FSIS widely tabulated minimum internal-temperature value"
    },
    "baldwin_heating_row": {
      "starting_temp_C": 5,
      "bath_temp_C": 73.9,
      "thickness_mm": 20,
      "heating_time_min": 75,
      "source_convention": "widely tabulated standard value; Douglas Baldwin sous-vide heating-time table convention"
    },
    "core_hold_time_min": 0,
    "source_convention": "widely tabulated standard value; endpoint hold convention explicitly stated"
  },
  "working": "1. USDA endpoint: (165 - 32) × 5/9 = 133 × 5/9 = 73.888...°C, rounded to 73.9°C. 2. Thickness is already 20 mm, so use the 20 mm row directly. 3. Total time = heating time + core hold time = 75 + 0 = 75 min."
}

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