I want to track the time that it takes to finish a work order, and compare it to the expected time, set based to experience over the years. The problem is that this time that is set on Operation itself, gets multiplied by the qty to produce by the work order. 

In my case, it would take the same time to make 10 or 100 units, so it's not working for me. (it's just cooking in an oven, per example)

Is there any way to change it, or any module that extends this work order capabilities?

Thanks!