PO creation-ME21n-Why SAP does not check company code and Plant relation

Question

Hi All,
Does someone know, why SAP does not check Plant and company code relation at the time of PO creation or how can we put validation between plant and company code at the time of PO creation.
<b>Example:</b> Suppose i have a company 0001 which is assinged to Plant 0001. when i am creating a PO with another company code 0002(Entering at header level-Org, data) and using Plant 0001 at line item level. SAP does not do this validation.
How can we put this check in place?
Thanks in advance.
Deepak

Answer 1

Hello Deepak,
There are three types of purchasing
- Company code specific :You need to assign company code to Pur organization
- Plant specific : You must assign plant to pur organization
- Cross company purchasing: No assignment between company code and pur organization.
In the case 3, the system will not check company code and plant relationship, but it will check plant and pur organization specific.
The following is the copy of sap help text:
You can assign a purchasing organization to one company code. This is company-specific purchasing.
You can assign a purchasing organization to no company code. This purchasing organization can then procure for all plants assigned to it, irrespective of the company code to which the plant belongs.
Since each plant must be assigned to a company code, the company code can be determined via the plant in each procurement transaction, even if the procuring purchasing organization is not assigned to a company code.
A purchasing organization must be assigned to one or more plants. This is plant-specific purchasing.
Now, check your company-code and purchase organization assignment.
Hope this helps.
Regards
Arif Mansuri