There are various ways of processing complex make-to-order production. If you want to process customer projects using the Project System, you can either use project stock or non-valuated sales order stock, with account assignment to your project.

This scenario has quantity-based inventory management being processed using the sales document item. The values for all the relevant postings are assigned to the non-valuated project stock.

To be able to use this scenario, use a requirement class with account assignment category D (standard customizing) for your sales document item. This account assignment category controls the following:

• The quantities for the sales document item by means of special stock indicator E
• The values in the WBS elements, by means of consumption indicator P

The advantage of this scenario is that there is only one stock (as viewed from MRP). The MRP planning run can simply assign the elements, triggering and covering material requirements in this stock.

There are also disadvantages to this scenario, arising from the use of non-valuated project stock.