So negativ dieser Begriff auch klingt, er ist m. E. in diesem Zusammenhang noch gebräuchlicher als "severance management".

Beispiele:

http://www.careerclinic.co.uk/corporate.html
"Our corporate package can help you if you are looking for:

- cost-effective ***exit management***
- a more sensitive approach to issues concerning restructuring
- objective career assessment for valued employees who are the unfortunate victims of headcount restrictions or a re-structuring
- evaluation of an employee who wishes to undertake a different role within your company and where line management objectivity is in question."

http://www.trainingspotting.com/exit_management_how_to_termi...

http://www.premes.co.uk/services/hrConsulting/exitMan.htm

http://www.wis.fh-brs.de/Diplom/Auslandssemester/Abschlussbe... (S. 7; "exit management" - Trennung von Mitarbeitern)