How is Customer Series Credit related to credit policy?

Suggestions:
The customer-division related specific information is to be stored in this master. This master specifies for each customer, the division(s) that are applicable. Customer Series Credit screen is available in SCM – Masters – Customer – Customer Series Credit.
Customers are mapped with the Item series applicable for the customer. Users have to enter the Credit term applicable for the customer series and the Maximum credit to be given to the customer for the specified series, beyond which the credit check fails. If a credit term policy is defined and linked with the customer and item series in this screen then the credit term policy works on the relative Sales orders for that particular customer.
Please refer screenshot: Cust_series_credit.png