GPT OSI STUDY
Generated: 2026-07-10 11:40:39 *

healthy_broadband            PASS
[ok] median error 0.008 <= 0.06 | [ok] false-low 0.0% <= 2% | [ok] mean a 0.998 >= 0.92 | [ok] min a 0.93 >= 0.70 | [ok] no fast trips | [ok] true margin >= target-0.02

intensity_step               PASS
[ok] median error 0.005 <= 0.06 | [ok] false-low 0.0% <= 2% | [ok] mean a 1.000 >= 0.92 | [ok] min a 0.99 >= 0.70 | [ok] no fast trips | [ok] true margin >= target-0.02

damage_step_broadband        PASS
[ok] authority response 0.375 s <= 0.75 s | [ok] defended violations 0.0% | [ok] min a 0.39 < 0.90 | [ok] no pre-damage trips

damage_step_lowband          PASS
[ok] authority response 1.375 s <= 2.00 s | [ok] defended violations 0.0% | [ok] min a 0.33 < 0.90 | [ok] no pre-damage trips

silent                       PASS
[ok] authority never sheds | [ok] no alarms

gradual_softening            PASS
[ok] ramp violations 0.0% <= 2% | [ok] final a 0.45 <= 0.80 | [ok] settled error 0.024 <= 0.08 | [ok] no pre-ramp trips

damage_then_repair           PASS
[ok] damage response 0.500 s <= 0.5 s | [ok] damaged violations 0.0% | [ok] a(repair+60) 1.00 >= 0.65 | [ok] a(repair+105) 1.00 >= 0.75 | [ok] authority recovers | [ok] healthy recovery margin

starts_damaged_improves      PASS
[ok] damaged-start violations 0.0% | [ok] target error 0.006 <= 0.06 | [ok] authority below max while damaged | [ok] full authority 1.62 s <= 30 s

regime_change_healthy        PASS
[ok] false-low 0.0% <= 2% | [ok] no trips outside transition | [ok] late min a 0.95 >= 0.85

transient_pulse              PASS
[ok] trips confined to pulse | [ok] low duration 0.9 s <= 10 s | [ok] a(pulse+40) 1.00 >= 0.22 | [ok] final a 1.00 >= 0.5 | [ok] healthy post-pulse margin

Acceptance all pass: FAIL
Fabby score: 94.770 | > 92 | PASS
GDB target: 0.550
GDB continuous: PASS | 0 NaN
GDB no idle shed: PASS | min a 1.000 (t < 44 s)
GDB quake deficit: PASS | activity 45.125 s, margin latency 0.000 s (limit <= 2.000 s)
GDB detect edge 1.5: FAIL | NaN s (drop >= 0.040, limit <= 2.000 s)
GDB detect edge 2: FAIL | NaN s (drop >= 0.040, limit <= 2.000 s)
GDB recovery: PASS | margin cross 76.500 s, authority latency 2.750 s, tail min a 0.958 (limit <= 3.000 s)