Designers KPI's


I’m doing a research topic on successful frameworks to performance measure designers. (Think yearly performance reviews etc)

It’s difficult to judge performance on aspects of a design that may be out of the designers control such as market forces, lack of marketing support, production issues etc etc, so measuring success on sales, volumes etc is contaminated.

I’ve looked at more direct measures such as quality of presentation of concepts, timely submissions, innovative concepts but I was wondering
does anyone have any other useful KPI’s that they use and are happy to share?