The basic functions that a system of a specific domain must necessarily exhibit come under this category. The process of specifying non-functional requirements requires the knowledge of the functionality of the system, as well as the knowledge of the context within which the system will operate.ĭomain requirements: Domain requirements are the requirements which are characteristic of a particular category or domain of projects. Life cycle constraints: maintainability, portability, etc.Performance constraints: response time, security, storage space, etc.NFR’s are classified into following types:
They are also called non-behavioral requirements. The priority or extent to which these factors are implemented varies from one project to other. Non-functional requirements: These are basically the quality constraints that the system must satisfy according to the project contract. There are many ways of expressing functional requirements e.g., natural language, a structured or formatted language with no rigorous syntax and formal specification language with proper syntax. In order to accurately describe the functional requirements, all scenarios must be enumerated. Each high-level functional requirement may involve several interactions or dialogues between the system and the outside world. They are basically the requirements stated by the user which one can see directly in the final product, unlike the non-functional requirements.įor example, in a hospital management system, a doctor should be able to retrieve the information of his patients. These are represented or stated in the form of input to be given to the system, the operation performed and the output expected. All these functionalities need to be necessarily incorporated into the system as a part of the contract. ISRO CS Syllabus for Scientist/Engineer Examįunctional Requirements: These are the requirements that the end user specifically demands as basic facilities that the system should offer.
0 kommentar(er)
