BMR/TDEE (Mifflin-St Jeor) mechanism

Model scope

The Mifflin-St Jeor equations and multiplicative TDEE relationship are standard and correct under the stated units. Verdict is NEEDS_REVIEW because the activity multiplier table and mapping from activity level to factor are missing, and sex-category handling is ambiguous. The educational-estimate, not-medical-advice label is appropriate.

No additional formula finding is recorded.

Units and conventions

• Weight W is in kilograms.
• Height H is in centimeters; using meters would produce an incorrect result.
• Age A is in completed years.
• The sex-specific equations are the standard Mifflin-St Jeor male and female equations.
• Activity factor is dimensionless and is applied as TDEE = BMR × activity factor.
• BMR and TDEE outputs are expressed in kcal/day.

Inspectable vector

One of 4 source-bound review vectors:

{
  "inputs": {
    "weight_kg": 70,
    "height_cm": 175,
    "age_years": 30,
    "sex": "male",
    "activity_level": "moderately active",
    "activity_factor": 1.55
  },
  "expected_outputs": {
    "BMR_kcal_per_day": 1648.75,
    "TDEE_kcal_per_day": 2555.5625
  },
  "working": "BMR = (10 × 70) + (6.25 × 175) − (5 × 30) + 5 = 700 + 1093.75 − 150 + 5 = 1648.75 kcal/day. TDEE = 1648.75 × 1.55 = 1648.75 + 906.8125 = 2555.5625 kcal/day."
}

Failure boundary

BREAK_CLAIMED · SELF_FLAGGED

An extreme but numerically representable input causes floating-point overflow to Infinity for both BMR and TDEE. The instrument should reject nonphysical or out-of-range inputs before arithmetic.

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-tranche2/tranche2-results.json
• BOUNDARY_HAZARD_CATALOG.json