Can you provide a little more detail on what you are trying to do?
WFA itself does not run schedules. If you want something to be regularly initiated via WFA, then it's possible to setup a cron job / windows scheduler to initiate a script that remotely calls the desired WFA workflow.
If you were asking if WFA can setup a schedule for ONTAP, then yes, that is completely possible.
>>> We would like to setup a schedule for ONTAP, how is this possible to do? <<<
Can you identify what kind of schedule you are trying to setup for ONTAP? A Snapshot Schedule? A Snapmirror or Snapvault schedule? Also are you working with legacy 7-mode systems, or are you working with clustered ONTAP systems? The answers to these quesations will help us provide you better answers and guidance.
>>> Or how is it possible to create a windows scheduler to initiate a powershell-script within wfa? <<<