{
  "code": {
    "converter": "forge_model/IMS/convert_ims.py",
    "evidence_gate": {
      "perception": [
        "confirmed",
        "weak"
      ],
      "reasoning": [
        "confirmed"
      ]
    },
    "excluded_labels": [
      "inner_race"
    ],
    "forge_agent_commit": "8f7c384bda3faa43f1f67ac07e1eba99d48aa1a0",
    "forge_model_commit": "a88573f32fb0f50ddbe7d865c8dcbfc48f3a74b1",
    "pipeline": "forge_agent/examples/ims/convert.py"
  },
  "dataset": "IMS",
  "generated_at": "2026-07-02T05:00:08",
  "raw_form_provenance": {
    "evidence_tier_by_class": {
      "ball": {
        "absent": 2515,
        "confirmed": 150,
        "weak": 335
      },
      "inner_race": {
        "absent": 2100,
        "confirmed": 40,
        "weak": 320
      },
      "normal": {
        "confirmed": 1195,
        "weak": 5
      },
      "outer_race": {
        "absent": 1530,
        "confirmed": 1200,
        "weak": 270
      }
    },
    "files_used": 1319,
    "generation": {
      "forge_agent_commit": "5622dddd61a6998052d1d1d9b8ded7c1b6a20561",
      "generated_at": "2026-07-01T06:29:07",
      "params": {
        "fault_cap": 600,
        "fault_onset": {
          "baseline_frac": 0.25,
          "detected_frac_by_channel": {
            "1st_B3_1": 0.918,
            "1st_B3_2": 0.853,
            "1st_B4_1": 0.77,
            "1st_B4_2": 0.747,
            "2nd_B1": 0.539,
            "3rd_B3": 0.836
          },
          "k": 6.0,
          "method": "trend_changepoint on rms health trend (stride 10)",
          "persist": 8,
          "smooth": 7
        },
        "fs": 20480.0,
        "gold": "documented end-state defect (readme); normal=early, fault=from the DATA-DRIVEN onset of the failed bearing",
        "healthy_frac": 0.4,
        "normal_cap": 240,
        "representations": [
          "spectrum",
          "spectrogram",
          "scalogram",
          "waveform",
          "reshaped"
        ],
        "rpm": 2000,
        "split": "file-stratified per class (IMS has too few bearings for a strict bearing-wise split)"
      },
      "source": "IMS / NASA-Bearing (NSF IMS Center + Rexnord); 3 run-to-failure sets, Rexnord ZA-2115",
      "tool": "forge_agent/examples/ims/convert.py"
    },
    "labels": {
      "ball": 3000,
      "inner_race": 2460,
      "normal": 1200,
      "outer_race": 3000
    },
    "records": 9660,
    "splits": {
      "test": 2475,
      "train": 7185
    }
  },
  "schema": "unified 7-field SFT (cate=C, task=T-C1)",
  "source": "IMS / NASA-Bearing (NSF IMS Center + Rexnord); 3 run-to-failure sets, Rexnord ZA-2115",
  "stats": {
    "spectrum": {
      "evidence_tier": {
        "confirmed": 509
      },
      "labels": {
        "ball": 30,
        "normal": 239,
        "outer_race": 240
      },
      "splits": {
        "test": 100,
        "train": 409
      },
      "total": 509
    }
  }
}