> For the complete documentation index, see [llms.txt](https://developer.harness.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.harness.io/resilience-testing/chaos-engineering/chaos-experiments/run-experiments.md).

# Run & Schedule Experiments

### Prerequisites <a href="#prerequisites" id="prerequisites"></a>

* [What is a Chaos Experiment?](/resilience-testing/chaos-engineering/chaos-experiments/index.md)
* [Create an experiment](/resilience-testing/chaos-engineering/chaos-experiments/create-experiments.md)

This topic describes how you can run or schedule experiments.

After configuring your chaos experiment, you can run the experiment immediately by clicking the **Run** button, or schedule it to run at a specific time by selecting the **Schedule** tab.

### Execute Experiment Once <a href="#execute-experiment-once" id="execute-experiment-once"></a>

* To execute the experiment once, select **Non-Cron (Single run)**, click **Set Schedule**, and then select **Run**.
* To run the experiment once, and at a specific time, select the **Run Once at a specific time**, choose the date and time, click apply, and select **Set Schedule**.

  ![Schedule experiment](/files/Kt8zZFus5JI98TDUwHNk)

### Execute Experiment on a Schedule <a href="#execute-experiment-on-a-schedule" id="execute-experiment-on-a-schedule"></a>

1. To schedule the experiment to run periodically, select **Cron (Recurring run)**, and set the schedule using the **Minutes**, **Hourly**, **Daily**, **Monthly** or **Yearly** options. The **Cron Expression** will be automatically generated.
2. Click **Set Schedule**.

   ![cron experiment](/files/gv3nkW1WlOll8id78DrJ)

### Next Steps <a href="#next-steps" id="next-steps"></a>

* [Edit or Update Experiment](/resilience-testing/chaos-engineering/chaos-experiments/edit-chaos-experiment.md)
* [Halt or Delete Experiment](/resilience-testing/chaos-engineering/chaos-experiments/halt-delete-chaos-experiment.md)