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

# Subprocess management

> Learn how to configure, start, and execute subprocesses efficiently within your process flow.

Subprocesses are smaller process flows triggered by actions in the main process. They can inherit some process parameter values from the parent process and communicate with front-end apps using the same connection details as their parent process.

## Overview

Subprocesses can be started in two modes:

* **Asynchronous**: Execute alongside the parent process without delaying it.
* **Synchronous**: The parent process waits until subprocesses are finished before advancing.

## Configuring & starting subprocesses

Design subprocesses within the FlowX Designer, mirroring the main process structure.

<Steps>
  <Step title="Start Subprocess Action">
    * Within user tasks or task nodes.
  </Step>

  <Step title="Call Activity node">
    * Custom node type in the main process.
  </Step>

  <Step title="Start Embedded Subprocess node">
    * Using the corresponding node.
  </Step>
</Steps>

### Parameter inheritance

<Info>
  Available for **Start Subprocess** action and **Call Activity** node.
</Info>

By default, subprocesses inherit all parent process parameter values. Configure inheritance by:

* **Copy from Current State**: Select keys to copy.
* **Exclude from Current State**: Specify keys to ignore.

Sub-processes can also have an [**Append Params to Parent Process**](../actions/append-params-to-parent-process) action  configured inside their process definitions which will append their results to the parent process parameter values.

<Card title="Append Params to Parent Process" href="../actions/append-params-to-parent-process" icon="file" />

## Executing subprocesses

Define subprocess execution mode:

* **Asynchronous/Synchronous**: Set the `startedAsync` parameter accordingly.

In synchronous mode, subprocesses notify completion to the parent process. The parent process then resumes its flow and handles subprocess data.

## Additional resources

For detailed guidance on configuring and running subprocesses:

<CardGroup>
  <Card title="Call activity node" href="../node/call-subprocess-tasks/call-activity-node" icon="link" />

  <Card title="Start a subprocess action" href="../actions/start-subprocess-action" icon="link" />

  <Card title="Start embedded subprocess" href="../node/call-subprocess-tasks/start-embedded-subprocess" icon="link" />
</CardGroup>