SAP MDG-S Rule based workflow Parallel and Dynamic. How to skip an approval?

Hi,

I used BAdI USMD_SSW_DYNAMIC_AGENT_SELECT and BAdI USMD_SSW_PARA_RESULT_HANDLER to achieve parallel approval (also dynamic department approvers). Now I have three parallel approvals which works well if all of them need approval and gets approved. But the requirement is, Based on particular table/fields (achieved using change documents) whether I need a particular department approval or not. for eg. Instead of all three approvals, I need only one or two department approvals (correctly I get one or two workitems instead of three). Here the workflow fails to complete (still waiting for other approvals). Can you please guide me how to achieve this?

Thanks,

Raghu