[beachy]

You can also use the information to optimise your workforce.

Lets say you're a big home improvement chain opening a new store. You need to get 150 workers to staff the new store.

Do you want to hire 250 people cold and hand the new store off to them? No.

You want to take the top 100 performers from nearby stores, who are busting for a chance to prove themselves, and pepper pot them into the new store, in positions of team leadership, seniors, etc. (And then do a bunch of hiring for the remaining 150, and the 100 to replace the ones you just transferred).

These are the sorts of win-win efficiencies you can pull off if you have good performance data for employees.

(Also astonishingly rare to see in action in the real world, but that's another story :)