Functional and Non Functional Requirements l Software Engineering | скачать в хорошем качестве

Functional and Non Functional Requirements l Software Engineering |

Functional and non-functional requirements are important considerations in various software development models. Here's how they relate to some common software engineering models: Waterfall Model: In the waterfall model, requirements are defined upfront and are typically classified as either functional or non-functional. Functional requirements describe the specific tasks or actions that the software must perform, while non-functional requirements describe the quality attributes that the software must possess to be considered acceptable. These requirements are used to guide the entire development process from planning to testing. Agile Model: In the Agile model, requirements are defined iteratively and incrementally. Functional requirements are often defined in user stories, which describe specific features or functions that the software must perform. Non-functional requirements are typically considered throughout the development process and are often prioritized based on their impact on user experience. Spiral Model: In the Spiral model, requirements are defined iteratively based on feedback and evaluation at each stage. Functional requirements are typically defined in each spiral based on specific features or functions that are prioritized based on user needs. Non-functional requirements are also considered at each stage and are often used to identify and manage risks. Prototype Model: In the Prototype model, requirements are defined based on a preliminary version of the software product. Functional requirements are typically defined based on specific features or functions that are needed to achieve the desired outcomes. Non-functional requirements are also considered during the prototype phase and are often used to evaluate the effectiveness and usability of the software product. Overall, both functional and non-functional requirements play important roles in software engineering, regardless of the development model used. Defining and prioritizing these requirements is a critical step in the development process, as they help to ensure that the software product meets the needs of users and stakeholders and is effective and usable.