The Call Workflow task is used to call another workflow from the current workflow.
Create a workflow called "hostname survey".
In this workflow, add a Call Workflow task and name it "call get hostname".
On the Call Workflow tab, click Choose Workflow.
Select the get hostname workflow, which displays the name of the host machine on which the workflow is run.
Click Create & Return to Workflow.
When the hostname survey workflow is run, the call get hostname Call Workflow task calls the get hostname workflow and displays the name of the host.