USECASE DIAGRAM

Use case is the circuit or description of a group of inter-related and form a system of regularly conducted or supervised by an actor. Use case are used to establish behavior of objects or things in a model and in realized by a collaboration. General use case is described by an ellipse with a solid line, usually containing of name .Use case describes the process of the system (system requirements from the user perspective).

In general use case is :

• Patterns of system behavior
• Sequence of related transactions performed by an actor

Use case diagram consists of :

• Use case
• Actors
• Relationship
• System boundary boxes (optional)
• Packages (optional)

Here is how to draw a use-case diagram:

Note:

Before making use-case diagram, you should start by making FDD first. This is just to help identify the processes in the system.

1. Start by registering actor associated with the Use-case, both the sender and receiver.
2. The components in a use-case diagram is a Use-Case Name, Description Use-case and participating actors and roles.
3.  Find demonstrating dependency semantic relations between two Use-case. If the Use-case "A" change can result in Use-case "B" will change as well.

There are 2 kinds of dependencies that need to be considered which include and extend

The following is an illustrative tool for use case diagram :

I will give an example of use case diagram blog creation.

The Explanation :

Before posting a blog, a user must log in to post a blog address with email id and its password. If the password does not match with email, the blog will give you a warning about password or email is incorrect. Once logged in, the administrator can perform several activities such as the following :

• Manage Profile

On this page, you can make additions profile and you can also edit profiles.

• Manage Post

You can add a post to edit the post and then you can do a review post on the blog page.

• Manage Template

On this page, you can explore your creativity to change the html of your blog template or download the template as you wish.

• Manage Comment

Users and visitors can further create comments for each blog post is posted by users, but before visitors will add a comment in a blog post, they must first log in with their email.

• Moneytize Blog

Visitors can leave request for posting ads on your blog, but first must get approval from the blog admin and the blog owner will usually get money from these ads.