Special stock indicator in production order

Question

Hi,
We have a new business scenario from sales department.
For example, A is a MTO item, it has component B & C. Now there is a sales order for A come in, and system create a production order, but there is no enough stock for B. They want to:
1, Allocate C to the production order and other production order or sales order can not take it away via V_V2 or MRP run.
2. Create another seperate purchase order for B and want this purchase order also allocate to this production order.
3. They do not want to use WIP stock because it is difficult to display WIP stock in SAP you know.
I trying to use the special stock indicator "E" for components in production order, and I move C to custom stock via 412 E with no issue.
But when I create a purchase order for B with account assignment "F",  it goes to normal stock in MD04. After I post GR for the purchase order, the quantity goes to production order directly, does not show in MD04 and did not reduce the requirement quantity.
If I create a purchase order for B with account assignment "E", it gives an error message "Sales document item is not defined for the transaction. I tried to change the requirement type from "KMFA" to "KE" in the sales order for A, and the production order disappeared, it is not accepted.
How should I define and configure the process?
Thank you so much.
Albert

Answer 1

Hi Albert
I suggest you to take a look on the setting "individuall/collective" on the tab MRP4 of the material master.
For both components, you should set the value 1 and system will always plan the components under the sales order special stock.
BR
Caetano