Our procurement staff are requesting "Ad-Hoc" approvals for Requisition processing. What they mean by that is, THEY would like the ability to inject an approval user or group into the approval chain ( most likely as a pre-approval ).
For example, our standard chain is
Pre-Approval Group1 -> pre-Approval Group2 -> Calculated Approval Chain -> post-Approval Group2
Under certain business conditions ( ie those requiring HR or Security approval ) they would like the ability to inject ( at their discretion ) an approval group of their choice
Pre-Approval Group1 -> pre-Approval Group2 -> INJECTED SECURITY PRE-APPROVAL GROUP -> Calculated Approval Chain -> post-Approval Group2
Any ideas, suggestion, or alternatives?