use case formates

What is use case?
Use cases describe the system from the user's point of view. Each use case is a complete series of events, described from the point of view of the actors. it is a documenting step and are written stories.


What a use case tells or describe?
• Use cases describe the interaction between one or more actors and the system itself.
• An actor is someone with behavior.
• A system use case is normally described the functionality level of the system..

Use case templates and formats
There is no standard template for documenting detailed use cases. Standardization within each system is more important than the detail of a specific template and formats.

Use case formats
There are two types of use case formats.

• Black-box use cases
• NOT Black-box use cases

Black-box use cases are the most common and recommended kind; they do not describe the internal workings of the system, its components, or design. Rather, the system is described as having responsibilities.
• By defining system responsibilities with black-box use cases, it is possible to
specify what the system must do without deciding how it will do it.


Use Case Diagrams
• A use case diagram in the Unified Modeling Language is a type of behavioral diagram.
• Its purpose is to present a graphical overview of the functionality provided by a system in terms of actors, their goals and any dependencies between those use cases and describes that what the system will do and how it will perform.

Use Case types
• Data maintenance use case:
These are typical, create, read, update, delete use cases. writing one per entity is repetitive.it is usually easier to write such usecae.

• Data analysis use case:
These use case are for analyzing transaction on entities that are manipulated by other use case.

Loyalty program use case:
These use cases allow customer to accrue the credits when using a service

Formality Types
Use cases are written in different formats, depending on need. use cases are written in varying degrees of formality:
• Brief—terse one-paragraph summary, usually of the main success scenario.
• Casual—informal paragraph format. Multiple paragraphs that cover various scenarios.

• Fully dressed—the most elaborate. All steps and variations are written in
Detail, and there are supporting sections, such as preconditions and success guarantees.

The Best Format?There isn’t one best format; some prefer the one-column style, some the two-column. Sections may be added and removed; heading names may change. None of this is particularly important; the key thing is to write the details of the main success scenario and its extensions, in some form. Summarizes many usable formats.