When multiple approver groups are related to an Endevor inventory group; how does the approver process work?
If the quorum is set to zero the package is automatically approved.
If the quorum is set to 1+ in both groups then approvers from each approver group will have to approve the package.
If the quorum is set to 1+ in only one group then once approvers from that group have approved the package; it is approved.
If none of the above scenarios meet your site requirements; it is time to look into using the external approver group option as explained in the package section of the Endevor documentation