# Experiment.concluded

URL: /business/events/Experiment.concluded · Id: `event:Experiment.concluded`

> Emitted each time an Experiment is concluded.

[Experiment.conclude](/business/nouns/experiment/conclude) emits `Experiment.concluded` when it completes on an [Experiment](/business/nouns/experiment).

| Property | Value |
| --- | --- |
| Emitted by | [Experiment.conclude](/business/nouns/experiment/conclude) |
| Noun | [Experiment](/business/nouns/experiment) |
| Moves | [Hypothesis](/business/nouns/hypothesis) `testing` to `supported` when the Experiment’s Metric met this Hypothesis’s threshold; [Hypothesis](/business/nouns/hypothesis) `testing` to `refuted` when the Experiment’s Metric missed this Hypothesis’s threshold; [Experiment](/business/nouns/experiment) `running` to `concluded` |
| Wakes | None. |

### Payload
Each delivery is an [Event](/business/nouns/event) record. `data` holds what [Experiment.conclude](/business/nouns/experiment/conclude) returns.

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `name` | `string` | Yes | `Experiment.concluded`. |
| `at` | `datetime` | Yes | When it happened. |
| `seq` | `integer` | No | Its position in the namespace, one more than the Event before; any seq is a cursor into the history. |
| `data` | `json` | Yes | The Thing as the Action left it. |
| `data.decision` | [Decision](/business/nouns/decision) | Yes | The recorded Decision. |
| `data.experiment` | [Experiment](/business/nouns/experiment) | Yes | The Experiment, now concluded. |
| `data.experiment.variants` | `json` | Yes | The variants and their split. |
| `data.experiment.decision` | `string` | No | One of `ship`, `kill`, or `iterate`. |

### Example
```json
{
  "$id": "https://api.sb/ledgerlark.com/events/event_1",
  "$type": "Event",
  "name": "Experiment.concluded",
  "at": "2026-10-22T12:00:00Z",
  "data": {
    "decision": {
      "$id": "https://api.sb/ledgerlark.com/decisions/decision_1",
      "$type": "Decision",
      "choice": "Example choice",
      "reason": "Example reason"
    },
    "experiment": {
      "$id": "https://api.sb/ledgerlark.com/experiments/experiment_1",
      "$type": "Experiment",
      "variants": {},
      "decision": "ship"
    }
  },
  "seq": 1
}
```