A use case is an account of a specific situation or scenario in which a person or system works with a software application or system. It shows the steps a user needs to take to complete a certain goal or job in the system, as well as how the user and the system work together.
Use cases are often used in software development to help find and explain system standards and make sure that the system meets the needs of its users. They make it possible to write down and talk about a system’s functional needs in a way that is easy to understand and can be tested.
The following are common parts of a use case:
Actor: The person, machine, or thing outside of the use case that starts it. This is the person who uses the method to get something done or reach a certain goal.
Goal or objective: The exact goal or job that the person wants to do with the system.
Pre-conditions are the things that have to be true before the use case can be run.
A description of the steps the user takes to reach the goal or finish the job, as well as how the user and the system work together.
Post-conditions are the things that must be true after the use case has been properly carried out.
Use cases help with software creation in a number of ways, such as:
Clarity: Use cases give a clear and straightforward account of the system needs, which makes it easier for stakeholders to understand what is needed.
Validation: Use cases can be checked to see if the system meets the functional standards outlined in the use case. This is done through testing.
Flexibility: Use cases can be used to describe different scenarios or situations, which makes them a flexible tool for describing system needs.
Consistency: Use cases can help make sure that the system needs are the same in all parts of the system. This makes mistakes and inconsistencies less likely to happen.
Overall, use cases are a good way to record and communicate system needs in a way that is easy to understand and can be tested to make sure they are correct.
