{
  "scope": "Hand-derived synthetic exercises; observed window only",
  "valid": {
    "stale-only": {
      "observations": 3,
      "fresh_observations": 1,
      "stale_observations": 2,
      "max_observed_age_us": 40000,
      "max_task_work_us": 100,
      "observed_task_over_budget": 0,
      "overflow_counter_at_last_observed_enqueue": 0,
      "dropped_rows_counter_at_end": 0,
      "no_reported_queue_or_log_losses": true
    },
    "queue-loss": {
      "observations": 2,
      "fresh_observations": 2,
      "stale_observations": 0,
      "max_observed_age_us": 10000,
      "max_task_work_us": 120,
      "observed_task_over_budget": 0,
      "overflow_counter_at_last_observed_enqueue": 2,
      "dropped_rows_counter_at_end": 0,
      "no_reported_queue_or_log_losses": false
    },
    "serial-loss": {
      "observations": 2,
      "fresh_observations": 2,
      "stale_observations": 0,
      "max_observed_age_us": 200,
      "max_task_work_us": 120,
      "observed_task_over_budget": 0,
      "overflow_counter_at_last_observed_enqueue": 0,
      "dropped_rows_counter_at_end": 1,
      "no_reported_queue_or_log_losses": false
    },
    "combined-loss": {
      "observations": 2,
      "fresh_observations": 2,
      "stale_observations": 0,
      "max_observed_age_us": 10000,
      "max_task_work_us": 120,
      "observed_task_over_budget": 0,
      "overflow_counter_at_last_observed_enqueue": 2,
      "dropped_rows_counter_at_end": 1,
      "no_reported_queue_or_log_losses": false
    },
    "task-budget": {
      "observations": 2,
      "fresh_observations": 2,
      "stale_observations": 0,
      "max_observed_age_us": 500,
      "max_task_work_us": 2001,
      "observed_task_over_budget": 1,
      "overflow_counter_at_last_observed_enqueue": 0,
      "dropped_rows_counter_at_end": 0,
      "no_reported_queue_or_log_losses": true
    },
    "partial-window": {
      "observations": 2,
      "fresh_observations": 2,
      "stale_observations": 0,
      "max_observed_age_us": 20000,
      "max_task_work_us": 120,
      "observed_task_over_budget": 0,
      "overflow_counter_at_last_observed_enqueue": 7,
      "dropped_rows_counter_at_end": 3,
      "no_reported_queue_or_log_losses": false
    }
  },
  "invalid": {
    "unexplained-gap": "Unexplained callback/log gap at line 3"
  }
}