E8.12 Calculate remaining MFG Lead Time per Work Order


Hi experts!
I work in a manufacturing company that I'm supporting especially from a Business Intelligence Point of View.
My objective now is to provide a holistic picture about all work orders in WIP with current status and remaining mfg lead time.
I'm already working with F4801 to extract current wip, combined with F3003 to calculate the number of total process steps.
I extraced the standard Lead Time Level from F4102.
What is missing now is the "backwards calculation" of the remaining lead time based on current state in F4801.
Is this possible?
I know it will not display the truth, but is a step forward.

I'm grateful for every help/ tip!