Business Use-Case. A Business Use-Case is a way in which a customer or some other interested party can make use of the business to get the result they want whether it’s to buy an item, to get a new driving licence, to pay an invoice, or whatever.dd a comment |. up vote 4 down vote. A business use-case describes the steps in a process that achieve a business goal. A system use-case describes behavior of a system that automates a business use-case. share | improve this answer.