OPM R12: Migrating Warehouses and Plants

One of the benefits of upgrading to release 12 is that you have the opportunity to 'restructure' your organization setup just a little bit (assuming you are an OPM customer). When you initially setup your OPM wareshouses, you did so by entering a new HR organization but in the name you put 3 to 4 characters and then a ':' to designate this HR organization as a warehouse. When you saved this new HR Organization it created an inventory organization on the discrete side as well as an OPM warehouse.

In the oracle documentation (OPM Migration Reference Guide) it states that you can convert these warehouses you've already setup into subinventories under an existing inventory organization. This is superb because the migration is already converting OPM plants into inventory organizations (if there is a resource warehouse code defined for the OPM Plant then no new inventory organization will be created). So by being able to migrate a warehouse as a subinventory you are reducing the number of inventory organizations you'll have to deal.
There are a few restrictions with this functionality (and unfortunately for me, my company could not migrate as we desired because of these restrictions). These restrictions are, per oracle documentation:

*All the warehouses that are bing mapped as subinventories under a single organization must belong to the same cost warehouse

*Warehouse can only be mapped as subinventories to the OPM Organization to which they belong (you can't migrate a warehouse belonging to plant A as a subinventory under plant B)

Where we ran into issues was that we had each warehouse setup as its own cost warehouse (not sure why, that decision predated my time) and we wanted to map warehouses from other plants all under a single plant. Overall the ability to map warehouses to migrate as subinventories is a good feature, unfortunately we were not able to use it.

If you have any questions or are curious to see our specific example let me know by email or through comments and I can show you how our situation is playing out.