Ideal/Adjusted Body Weight mechanism

Model scope

The existing educational-reference and not-medical-advice label is appropriate, but IBW and AdjBW are method-dependent estimates and are not universally valid dosing weights. Drug-specific dosing rules, clinical judgment, and local protocols may use different formulas or correction factors.

• The Devine IBW formulas are standard when height is measured in total inches and body weight is in kilograms.
• The specification does not define behavior for height below 60 inches: it must state whether the formula is extrapolated using a negative inches-over-60 value or whether the excess is clamped at zero.
• The sex input is ambiguous: only Men and Women constants are provided, with no defined mapping for nonbinary, intersex, or unspecified inputs.
• The specification does not explicitly state that ActualBW must be in kilograms, so unit consistency is not guaranteed.

Units and conventions

• Height must be total inches for direct use in the formula; if entered in centimeters, convert using inches = centimeters / 2.54.
• Actual body weight, IBW, and AdjBW are assumed to be in kilograms.
• The 60-inch reference is exactly 5 feet.
• The 0.4 adjustment factor is dimensionless.
• Devine constants 50 kg and 45.5 kg are applied to men and women, respectively.

Inspectable vector

One of 4 source-bound review vectors:

{
  "inputs": {
    "sex": "man",
    "height": 60,
    "height_unit": "in",
    "actual_weight": 50,
    "weight_unit": "kg"
  },
  "expected_outputs": {
    "IBW_kg": 50,
    "AdjBW_kg": 50
  },
  "working": "Inches over 60 = 60 - 60 = 0. IBW = 50 + 2.3 × 0 = 50 kg. ActualBW - IBW = 50 - 50 = 0 kg. AdjBW = 50 + 0.4 × 0 = 50 kg."
}

Failure boundary

BREAK_CLAIMED · SELF_FLAGGED

The extreme-magnitude vector produces Infinity and NaN through floating-point overflow and Infinity plus negative Infinity. The convention probe also exposes an input-validation hazard when height units are omitted or ambiguous.

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-tranche3/tranche3-results.json
• BOUNDARY_HAZARD_CATALOG.json