{
  "_about": "Longitudinal series: one entity, one metric, many time points. Each point carries TWO dates - observed_at (when it was said) and refers_to (the period it describes) - because 'before we built the script it was two days' is said in September about the past. Each point also carries the modality of the evidence it came from, so a series can show a secondhand estimate being replaced by a firsthand one. Categorical series (status, cause) work the same way as numeric ones.",
  "series": [
    {
      "id": "obs_01", "entity": "person_A", "concept": "ent_consolidation_process", "metric": "weekly_prep_hours_team", "unit": "hours/week",
      "points": [
        { "observed_at": "2026-09-14", "refers_to": "2026-09", "value": 6, "approximate": true, "evidence": "ev_005", "modality": "firsthand/asserts" },
        { "observed_at": "2026-12-10", "refers_to": "2026-12", "value": 4, "approximate": true, "evidence": "ev_202", "modality": "firsthand/hedges" }
      ],
      "reading": "Down ~2h/week after the remap tool. The remaining 4h is unexplained - remapping was never claimed to be the whole cost (ev_011 flag)."
    },
    {
      "id": "obs_02", "entity": "person_A", "concept": "ent_consolidation_process", "metric": "month_end_prep_hours_team", "unit": "hours",
      "points": [
        { "observed_at": "2026-09-14", "refers_to": "2026-09", "value": 10, "approximate": true, "evidence": "ev_006", "modality": "firsthand/asserts" },
        { "observed_at": "2026-12-10", "refers_to": "2026-12", "value": 7,  "approximate": true, "evidence": "ev_203", "modality": "firsthand/hedges" }
      ],
      "reading": "Month-end premium shrank from +4h to +3h."
    },
    {
      "id": "obs_03", "entity": "person_A", "concept": "ent_report_gaps", "metric": "gap_cause", "unit": "categorical",
      "points": [
        { "observed_at": "2026-09-14", "refers_to": "2026-spring..09", "value": "unspecified ('goes out with gaps')", "evidence": "ev_018", "modality": "firsthand/corrects" },
        { "observed_at": "2026-12-10", "refers_to": "2026-12", "value": "fleet tracker export arrives after 3 p.m. cutoff", "evidence": "ev_205", "modality": "firsthand/asserts" }
      ],
      "reading": "The follow-up defined what 'gaps' meant. Whether the cause changed or was always this is not knowable from the data - tx_001 never said."
    },
    {
      "id": "obs_04", "entity": "org_A", "concept": "ent_security_review", "metric": "review_duration_weeks", "unit": "weeks",
      "points": [
        { "observed_at": "2026-09-14", "refers_to": "a previous review (date unknown)", "value": 6, "approximate": true, "evidence": "ev_025", "modality": "secondhand/hedges" },
        { "observed_at": "2026-12-10", "refers_to": "2026-09..11 (the pilot's review)", "value": 9, "approximate": false, "evidence": "ev_206", "modality": "firsthand/asserts" }
      ],
      "reading": "Two DIFFERENT reviews, not the same one re-measured. The second is better evidence (firsthand) and longer. ev_207 suggests it includes queue time."
    },
    {
      "id": "obs_05", "entity": "org_A", "concept": "ent_remap_tool", "metric": "purchase_status", "unit": "categorical",
      "points": [
        { "observed_at": "2026-09-14", "refers_to": "2026-09", "value": "interest expressed; no budget known; pilot 'in principle'", "evidence": "ev_020", "modality": "firsthand/asserts" },
        { "observed_at": "2026-12-10", "refers_to": "2026-12", "value": "pilot completed; 8k quote; funds located; sign-off pending", "evidence": "ev_211", "modality": "firsthand/asserts" }
      ],
      "reading": "Advanced three stages in three months without becoming a purchase. Proposed sign-off date Jan 2027 (ev_212), self-discounted by the speaker."
    },
    {
      "id": "obs_06", "entity": "org_A", "concept": "ent_schema_drift", "metric": "reported_cause", "unit": "categorical",
      "points": [
        { "observed_at": "2026-09-14", "refers_to": "2026-09", "value": "guess: someone on the warehouse side edits the template", "evidence": "ev_010", "modality": "speaker_inference/guesses" },
        { "observed_at": "2026-12-10", "refers_to": "2026-12", "value": "reported: a warehouse manager edits the template when adding a metric", "evidence": "ev_208", "modality": "unclear/asserts" }
      ],
      "reading": "Stance moved from guesses to asserts; source moved from speaker_inference to unclear (they say they found out, not how). This is progress, not proof."
    },
    {
      "id": "obs_07", "entity": "org_A", "concept": "ent_downstream_daily_request", "metric": "daily_report_requests_cumulative", "unit": "count",
      "points": [
        { "observed_at": "2026-09-14", "refers_to": "to 2026-09", "value": 2, "evidence": "ev_028", "modality": "firsthand/asserts" },
        { "observed_at": "2026-12-10", "refers_to": "to 2026-12", "value": 3, "evidence": "ev_214", "modality": "firsthand/asserts" }
      ],
      "reading": "Both mentions volunteered. Unprompted recurrence across interviews is the strongest salience signal in the corpus."
    },
    {
      "id": "obs_08", "entity": "person_priya", "concept": null, "metric": "status", "unit": "categorical",
      "points": [
        { "observed_at": "2026-09-14", "refers_to": "2026-09", "value": "on team; handles finance spreadsheet", "evidence": "ev_008", "modality": "firsthand/asserts" },
        { "observed_at": "2026-12-10", "refers_to": "2026-10", "value": "left the organisation", "evidence": "ev_213", "modality": "firsthand/asserts" }
      ],
      "reading": "An entity attribute changing. Also changes person_A's knowledge basis for the finance spreadsheet (secondhand -> firsthand)."
    },
    {
      "id": "obs_09", "entity": "person_B", "concept": "ent_consolidation_process", "metric": "monthly_merge_hours", "unit": "hours/month",
      "points": [
        { "observed_at": "2026-09-22", "refers_to": "before the script (date unknown)", "value": 16, "approximate": true, "evidence": "ev_105", "modality": "firsthand/asserts", "note": "'two days' converted by extractor" },
        { "observed_at": "2026-09-22", "refers_to": "2026-09", "value": 2, "approximate": true, "evidence": "ev_104", "modality": "firsthand/hedges" }
      ],
      "reading": "Two time points from ONE interview - observed_at is the same, refers_to differs. Retrospective before/after; treat the 'before' as recall."
    }
  ]
}