yabru,
This is not what round robin is used for. What round robin accomplishes, is making sure that a technician works his/her incidents in the order of date and priority.
What you are looking to accomplish would have to be customized in the routing rules workflow. After determining what group to route the incident, you would then do the following
1. Enumerate the members of that group
2. Get the number of incidents of each group member
3. Instead of routing the incident to the group, you would "route" it to this technician.
Hope this helps describe round robin and give you a solution for your problem,
Thanks,
David Ramazetti
Senior Technical Solutions Consultant
XCEND Group