# Projects

A project combines one data source with one ontology, one eval suite, and one review queue.

Before creating a production project, [choose whether the ontology will be managed in git or in the web app](/start/choose/). That decision determines where changes are made and published.

## Create a project

An organization admin creates the project, names it, and connects a warehouse or uploads DDL. The data connection can be added later, but questions cannot run until Cassis has a schema.

## What belongs to the project

- **Data source** One live warehouse connection or one uploaded DDL schema.

- **Ontology** The domains, tables, joins, metrics, and published version used by every answer.

- **Quality** Its eval suite and Review queue.

- **Management** App-managed, or one repository and configured ontology path.

- **Write access** Open to all editors, or restricted with [domain permissions](/setup/permissions/).

Members, roles, API keys, and the GitHub and Slack installations belong to the organization. Individual projects select their repository and Slack channel mappings.

Demo accounts include a deletable sample project. Production projects are not deleted from the app.