What performance metrics? Never heard about something like that. More often than not, the sum of individual performance is not 2+2=4 but more like 2+2=3 or 1+1

What performance metrics? Never heard about something like that. More often than not, the sum of individual performance is not 2+2=4 but more like 2+2=3 or 1+1+1=4 Combining high performers (2) is often not better (1)