The problem is that the performance cannot be measured really, do there's nothing to talk about. KPIs like LOC/month or resolved tickets/month does not tell anything. Nor does completed projects/year, nor does the project's size. Name a single thing which does not depend on external stuff. Have fun with an idiotic client, or an idiotic management. If you want to remove the people who do not work, then do that. If you do not know who they are, fire your managers. Or better, fire yourself too, as it seems like you dont' know what you are doing. If you want to lower costs, fire managers and sales people first.