Question

Briefly explain four different types of Use-Cases in terms of the purpose and the amount of information

Answer 1

There are mainly two different types of use cases on a broader level/But when we divide them also it can become four:

1. Formal Business use case
2. In-formal Business use case
3. Formal System use case
4. In-formal System use case

• When we represent the use cases in textual form,
• both use case types can be presented as either “informal” use cases or “formal” use cases.
• “Informal” use cases are quite brief with just enough information to get the point across.
• “Formal” use cases are meant to be more detailed.

Business use case:

• It describes "a sequence of actions performed in a business that produces a result of observable value to an individual actor of the business".
• Thus, from an individual actor's perspective, a business use case defines the complete workflow that produces the desired outputs or results.

System use case:

• It displays the relationships between consumers and providers of application services.
• The purpose of it is to help to describe and validate the interaction between actors and their roles with applications.

Please note: There all types are very intermingled with each other so it can be confusing sometimes.

Please let me know in the comments in case of any confusion. Also, please upvote if you like.