Auto Approval of flexible workflow based on Custom Condition

Please assistance to plan solution to setup flexible workflow successful a lawsuit wherever PO should beryllium automatically approver if PO has Outline statement arsenic notation object. 

In a lawsuit wherever PO doesn't person immoderate Outline statement arsenic notation past aforesaid PO should beryllium passed to approver for WF approval. 

We are already capable to trigger flexible workflow to approver for PO, but present conscionable privation to get car approved successful a lawsuit wherever determination is OA successful PO item.

Many Thanks !