vFabric Automation Workflows

I am working in an environment with the following components:

• vSphere 5.5
• vCenter 5.5
• vCloud Application Director 6.0.1

I am attempting to automate (as part of a deployment) the patching of a system image using existing WSUS infrastructure (internal).  I have managed to find modules in PowerShell that will get the update list, download, install then reboot the system automatically. (YAY!)

As part of the command set, I can have the script NOT reboot automatically, but check a condition to see if a reboot is necessary. I can also check to see if there are any more required updates and set a condition if I am complete.

Here's where I run into a small snag...  Is there a way to execute the same workflow step again if a specific condition is not met?

Any suggestions?

Roger