workflow DoSomeWork {
  parallel {
    Get-Process -ComputerName server01
    Get-Process -ComputerName server02
    Get-Process -ComputerName server03
  }
}

One of the unique features of PowerShell Workflow is the ability to define a block of activities as parallel. To use this feature, use the parallel keyword inside your Workflow.

Calling workflow activities in parallel may help to improve performance of your workflow.