What is the use case model?

A business analysis presentation of the steps involved in defining the interactions between a user (actor) and a system (computer system) is termed as use case model. It gives details on the interactions and sets the expectations of how the user will work within the system. The use case model consist of 2 main elements:

• Use case diagram – It is a graphical representation that details which actors can operate which use cases

• Use case description – It is a detailed textual step by step presentation of interactions and dialogue between the actor and the system.

The use case model requires a use case diagram. It describes the business environment. Its primary goal is to show the series of events and actions within any given process that will be performed by an actor.