What is Functional Requirement

1.

In functional requirement we capture what the system is about to do. These requirements are gathered using use cases and prototypes. Learn more in: A Software Engineering Perspective for Development of Enterprise Applications

2.

A functional requirement is a system feature or functionality that is directly visible to external system users. Learn more in: Modeling Security Requirements for Trustworthy Systems

3.

Functional requirement that define specific behavior or function of system which come from business needs. The plan for implementing functional requirements is detailed in the system design. Learn more in: Business Intelligence Impacts on Design of Enterprise Systems

4.

A requirement that describes a main functionality or behavior of a system. Learn more in: Measurable and Behavioral Non-Functional Requirements in Web Service Composition

5.

A requirement expressed using only qualitative terms and stating a goal or objective which shall be achieved (e.g., “buildings shall have escape routes which allow users to leave the building sufficiently quickly and safely, taking into consideration its purpose and size, and whether emergency equipment can be used”). Learn more in: Teaching Fire Safety in Schools of Architecture: The Spanish Case

6.

A requirement that define a function that a component or system must be able to perform. Learn more in: Requirements Refinement and Component Reuse: The FoReVer Contract-Based Approach

7.

Functional requirement that define specific behavior or function of system which come from business needs. The plan for implementing functional requirements is detailed in the system design. Learn more in: Business Intelligence Impacts on Design of Enterprise Systems