What is Requirement?

1-what the business needs (business requirements); 2-what the users need to do (user requirements);

3-what the software should do (functional requirements);

4-characteristics the system should have (nonfunctional requirements);

5-and how the system should be built (system requirements).

6-restrictions that are placed on the choices available to the developer for the design and construction of a software product (constraints).

What is Requirement? . . A statement of what the system must do; or A statement of characteristics the system must have level of requirements: what the business needs (business requirements); what the users need to do (user requirements); what the software should do (functional requirements); - characteristics the system should have (nonfunctional requirements); and how the system should be built (system requirements). restrictions that are placed on the choices available to the developer for the design and construction of a software product (constraints)