The requirements can be in any of the following forms,

• CRS(Customer Requirement Specification)
• SRS(System Requirement Specification)
• FS(Functional Specification)
• I fwe dont have requirements and if we are given only the application, then we do exploratory testing.
• Usecase.

Use Case

Use case is a pictorial representation of requirements. It explains how the end user interacts with the application. It gives all possible ways of how the end user uses the application.

Difference between use case and prototype

Use case – talks about how the product should work. It is a pictorial representation of the application and its various features and also how they should work.

Prototype – here, we will not see how the end user interacts with the application. It‟s just a screenshot of the application (exact image of the application)

How developers develop use cases

Developers use standard symbols to write use cases for universal understanding. He uses UML – Unified Modelling Language to develop use cases.

There are readymade tools to write use cases – like Rational Rose. It has readymade UML symbols – we can just drag and drop them to write use cases – developers use these symbols and write use cases.