> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vistaly.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Experiment

> Experiments (Assumption Tests) are one of the supported [Discovery Space](/guides/getting-started/the-discovery-space) card types.

## What is an Experiment Card?

Experiments provide evidence to de-risk high-risk assumptions. As a result, they save time, money, and energy by preventing investment in a solution that will give little to no return on investment.

***Tip**: Consider running experiments on assumptions with weak evidence AND would run a high risk of project failure if not correctly understood.*

## Statuses

Once solution assumptions have been identified, use experiment *(assumption test)* statuses to communicate how tests are progressing. Experiments support the following statuses:

| **Stage**      | Commitment              | Description                                                                                                |
| -------------- | ----------------------- | ---------------------------------------------------------------------------------------------------------- |
| **Developing** | In preparation          | Experiment design is being created or refined before execution. Methods and metrics are being established. |
| **Pending**    | Ready for execution     | Experiment is fully designed and waiting to be run. All prerequisites are in place.                        |
| **Running**    | In progress             | Experiment is currently active and collecting data. Results are not yet available.                         |
| **Failed**     | Completed (invalidated) | Experiment has concluded and results indicate the assumption was incorrect or not supported by evidence.   |
| **Passed**     | Completed (validated)   | Experiment has concluded and results support the original assumption, providing validation.                |

## Learn more

To learn more about how to use experiments with other card types, view the [Discovery Space](/guides/getting-started/the-discovery-space) guide.