credit managment

Dear sd gurus good morning and have a wonderful day

Dear gurus i have small doubt in credit management ,in OVAD T.code 1) goods issue credit group and 2) DLIVERY CREDIT GROUP are there

goods issue credit group enables us to combine different delivery types for porpose of making a credit check at the time of goods issue.

2 one enables us to combine different delivery types for the purpose of of credit management

could u explain littile bit about 2 one bz i am unable to understand pl give me one example

thank you so much

venu gopal reddy