When you are reading about projects, project management, software development life cycle, unified modeling languages etc. you will hear a term very commonly, the use case. A person new to this area of profession will definitely be curious to know about use case and use case diagram and he must be given ample information about this particular topic because it plays an important role in certain professional careers. For example, the use case diagram is staple element of the workings of a business analyst and he has to present a use case diagram at the start of various projects.

In simpler words the use case diagram will be defined as an illustration of a system from an outsider’s view in such a way as to describe the interaction of actors with the system and system’s response to the interactions from the actors. The diagram could illustrate the whole function or just a particular component of the system. Of course, the importance of use case diagram is huge and that’s why it is so important for a business analyst to gain knowledge of constructing a use case diagram. The main purpose of this diagram is to construct the relation between the system and the actors – actors being the people or components that interact with the system.

When constructed properly the diagram will display the actors, the system and the interaction so the necessary components of a system are understood by the end user. For example, you could construct a use case diagram of a system that is formed from the relation between a student and the financial institution that grants him loans and grants. The use case diagram gives a superficial view of the system rather than going into the depths and explaining how the interaction is taking place, what errors could change the response of the system or what processes are involved within a particular action.

It wouldn’t be wrong to say that for a business analyst the importance of use case diagram is higher as compared to what it is for people associated with other professions. Before starting to work on any project a business analyst must understand the system fully well and only then he can pin-point the areas of improvement in the system. Since use case diagram is done at the start of a project and is considered less complex method of representing the functionality of a system, it is the best method for a business analyst to know the system.

It is the use of use case diagram that is best for a business analyst to know what components are compulsory for a system to function and what alternatives could be suggested or incorporated in the system to replace the existing functionality. The purpose of presenting the system in the form of a use case diagram is to make the viewer understand the system in one quick glance. However, this general illustration is more than enough to define the most needed components of a system so before a project is started the track is already defined.

Author Bio:

This article about the importance of use case diagram has been written by Waqar Hassan. The history of his work as a freelance Blogger, Editor, Writer, SEO Writer, Technical Writer, Social Media Expert, resume & cover letter writer reflects the adaptability he can offer through his work. Creative writing is a field he flourishes in by combining his research and writing expertise in order to produce useful piece of writing that will certainly comprise a compelling result. Waqar Hassan can be contacted at w.hassangill@live.com and followed at @HassanGill on Twitter.