I am working on this request that the old plant will be removed to its current company code and assigned it to new company code. SAP has been using for couple of years already so many data has been created and documents processed. I am aware of the plants set up configuration and OX18 but I think it will not be good removing the old plant in 0X18 and just assigned it to the new company code requested. I am thinking that create a new plant exactly the same with the old plant settings then assign it to requested company code. However, how about the existing data from the old plant? Are there any programs that can be used to copy the existing data of plant configuration?
Make sure that the plant has nil transaction both quantity wise and value wise. ie MM and FI.
Then you can reassign the same plant to your new company code.
Check the use of the Conversion Workbench (CWB), special tool like the
Migration Workbench, especially developed for this kind of tasks.