The "numbers" refer to your performance on road compared to your dispatch.
Let's say you are dispatched with a 9 hour day and that it takes you 8.5 hours to do it. Your "numbers' will show that you were .5 under, which is good.
Let's say that you ran that same 9 hour day in 10.5 hours. You would be 1.5 hours over, which is not good.
The goal is to get as close to your dispatched time without going too far over (<.5). The ideal would be to run "scratch", which means it took you 9 hours to run a 9 hour dispatch.
The dispatch is calculated based on your miles, pkgs del, pkg p/u, COD's, delivery and pickup stops, etc.
These numbers assume that you actually took your lunch and break(s).
There are those on this forum that contend that this is not a production job. They couldn't be more wrong.