# Dependencies

> What a task waits for: another task's finish or start, with a lag in working days.

A dependency says what a [task](/docs/apps/projects/tasks) waits for, such as "Furnish the office"
waiting for "Sign the lease" to finish. Continual schedules tasks from their dependencies.

## How it works

You add a dependency on the task that waits, under **Waits for**. Choose the task it waits for and
the **Type**:

- **Finish to start**: it starts once the other task finishes. This is the default.
- **Start to start**: it starts once the other task starts.
- **Finish to finish**: it finishes once the other task finishes.

Add a **Lag** in working days if the task must wait longer, such as two days for paint to dry. A
task cannot wait for itself, and it waits for another task at most once.

Deleting either task deletes the dependency. If dependencies form a loop, Continual leaves the
tasks in it without dates and the project says which tasks wait for each other.

<RecordReference type="projects.dependency" />

## Next steps

<Cards>
  <Card title="Tasks" href="/docs/apps/projects/tasks" icon="check">
    How Continual schedules tasks.
  </Card>
  <Card
    title="Plan and run a project"
    href="/docs/guides/run-a-project"
    icon="folder"
  >
    Plan a project step by step.
  </Card>
</Cards>