SAP CRM - Item Category Determination

Hi all,

I have a question when defining the Item Category Determination in the process of creating a sales order.

Does anyone know the way the process follows between the Item Category Group and the Item Category Determination?

In the sales order I choose the Item Category Group “Provider Rate Plan”. When creating a sales order the flow follows the Item Category Group “Provider Rate Plan” with transaction type “YPVC” and Item Category “PRCP”, but in my system I have several transaction types and Item Categories defined for the same Provider Rate Plan.

You can see in the following picture:

Do you know where it is defined that a sales order with the Item Category Group “Provider Rate Plan” must follow the “YPVC” (Transaction type) and the “PRCP” (Item Category) schema determination and not, for instance the combination of “YPVO”-“PRON”?.

Thank you a lot for your help in advance.

Regards.