> 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/continuous-delivery/use-continuous-delivery/cd-building-blocks/cd-steps/flow-control.md).

# Deployment Flow Control

{% content-ref url="/pages/wvZIi5Bvry9Hlpf5fIzw" %}
[Controlling resource usage with Barriers, Resource Constraints, and Queue steps](/continuous-delivery/use-continuous-delivery/cd-building-blocks/cd-steps/flow-control/controlling-deployments-with-barriers-resource-constraints-and-queue-steps.md)
{% endcontent-ref %}

{% content-ref url="/pages/GDYUvF5LnvKxENl5ZhTj" %}
[Control resource usage with Queue steps](/continuous-delivery/use-continuous-delivery/cd-building-blocks/cd-steps/flow-control/control-resource-usage-with-queue-steps.md)
{% endcontent-ref %}

{% content-ref url="/pages/67akbbycPvdr3ypSwjmG" %}
[Synchronize parallel stages and step groups using Barriers](/continuous-delivery/use-continuous-delivery/cd-building-blocks/cd-steps/flow-control/synchronize-deployments-using-barriers.md)
{% endcontent-ref %}