Difference between functional and non functional requirements | скачать в хорошем качестве

Difference between functional and non functional requirements |

Difference between functional and non functional requirements | A functional requirement defines a system or its component. A non-functional requirement defines the quality attribute of a software system. It specifies “What should the software system do?” It places constraints on “How should the software system fulfill the functional requirements?” Functional Requirements A functional requirement defines a system or its component. It specifies “What should the software system do?” Functional requirement is specified by User. It is mandatory. It is captured in use case. Product Feature Defined at a component level. Helps you verify the functionality of the software. Functional Testing like System, Integration, End to End, API testing, etc are done. Usually easy to define. Example : Authentication of user whenever he/she logs into the system. Calculation, Data consumption, Languages, API, Non-Functional Requirements A non-functional requirement defines the quality attribute of a software system It places constraints on “How should the software system fulfil the functional requirements?” Non-functional requirement is specified by technical peoples eg Architect, Technical leaders and software developers It is not mandatory. But desirable It is captured as a quality attribute. Product Properties Applied to a system as a whole Helps you to verify the performance of the software Non-Functional Testing like Performance, Stress, Usability, Security testing, etc are done Usually more difficult to define Example : Emails should be sent with a latency of no greater than hours from such an activity. Reliability, Security. Scalability, Performance, Availability, Accessibility. Usability, functional requirements,functional and nonfunctional requirements,non functional requirements,functional and non-functional requirements,functional and non functional requirements,functional and non-functional requirements with examples,non functional testing,types of functional requirements,functional requirements example,what is functional requirement,functional and non functional testing,non functional requirements in software engineering