When you add machines to a workload onboarding plan, you allow existing unmanaged machines to be imported into Cloud Assembly management.
If you add a cloud account/region to Cloud Assembly that contains machines that were deployed outside of Cloud Assembly, you can bring those machines into Cloud Assembly management by first data-collecting them and then adding them to a workload onboarding plan. When you add the machines to an workload onboarding plan, you can group all or some of them into a single deployment, or onboard each machine as a separate deployment.
Use a workload onboarding plan to:
Import unmanaged machines into Cloud Assembly management.
Create a deployment, and optionally a blueprint, for machines that do not yet exist in Cloud Assembly management.
The person who runs the workload onboarding plan is automatically assigned as the machine owner.