Best Practises to do corrections to material or resource quantities against a closed Work Order

Hi Experts,

I am looking for the Best Practises to do corrections to material or resource quantities against a closed Work Order.

For ex. a WO was either over issued/under issued the material AND/OR overcharged/undercharged the resources. It was completed and closed.

Now user noticies the cost variance against that WO due to this and want to reopen and make corrections for materials(which can be having WIP supply type as Push, Operation Pull & Assembly Pull) and resources used.

What would be the ideal ways of doing these corrections in the sytem.

Thanks!