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What is the difference between a use case specification and a use case realization ?

Posted by Vineet Banwet

Article Rating // 46562 Views // 0 Additional Answers & Comments

Categories: Systems Analysis, Use Cases


A Use Case Specification is a textual description of the functionality provided by the system. It captures actor-system interaction. That is, it specifies how a user interacts with a system and how the system responds to the user actions. It is often phrased in the form of a dialog between the actor and the system. The use case specification is represented in the use case diagram by an oval, and is what most people think of when they hear the term use case.

A Use Case Realization describes how a use case, which is logically defined by the use case specification, is physically implemented within a design model in terms of collaborating objects. It organizes the design model artifacts related to the use case. It often comprises multiple design artifacts such as a class diagram, object diagram, sequence diagram, etc. that describe how the physical design will implement the use case specification.

The purpose of use case realization is to separate the concerns of the system stakeholders, which are typically captured by the use case model and system requirements, from the concerns of the system designers. In doing so, the designers can choose to implement the use case specification without affecting the use case specification.



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Do your homework prior to the business analysis interview!

Having an idea of the type of questions you might be asked during a business analyst interview will not only give you confidence but it will also help you to formulate your thoughts and to be better prepared to answer the interview questions you might get during the interview for a business analyst position.  Of course, just memorizing a list of business analyst interview questions will not make you a great business analyst but it might just help you get that next job.



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