Item master vs Inv org as Item validation org in cost org relationship for cost category at orglevel

Summary:

We are implementing oracle manufacturing for an industrial manufacturing client which has a wide range of manufacturing processes and therefore costing requirement differs for different manufacturing facilities. Some manufacturing facilities (job shops) will be using weighted average cost as the costing method while others (mass production) will be using standard costing method. There are specific costing requirements for interorganizational transfer transactions as well.

Above means that we need to maintain costing category at the organization level and not at the item master level. To incorporate this, we'll need to maintain item validation organization as inventory organization in cost organization relationship. However, we have noticed that in