How can you make mass costing changes to a big volume of various materials?

There is often a need to make changes to materials used in production (raw materials, packaging materials, etc). Costing run�is a transaction available in SAP that helps manage periodic costing of large number of materials within a company code. It consists of the following stages: creation of costing run, selection of materials, explosion of quantity structure, execution of the costing run, marking and release of costing run.