How do I shorten a Production Order?

Good Day everyone.
I am facing a problem in manufacturing matters, and I was wondering if you could help me with it.

The problem is concerning employees’ work at the workstations. Allow me to elaborate.
There are multiple workstations and each of them has one operation, and each operation has its own time range. For example, 15 minutes for the first operation.
The main issue is that if the assigned employee on the workstation has finished manufacturing in 5 minutes instead of 15 minutes, How can I give this employee a bonus for speeding up the manufacturing process??
Also, How can I finish the Production Order??

Thank You.

There is no such system out of the box, but you can track actual times via the time sheet created against that Production Order