ian@didosolutions.com

An important part of having functional and non-functional requirements is access to a particular effort to determine if the effort complies with the requirements. The approach is slightly different between Functional and Non-Functional requirements. For Functional Requirements, it is important to think about what requirements need to be covered for a particular effort. For example,

Non-functional requirements are often incorrectly assumed rather than being explicitly defined by users. This can lead to problems towards the end of a project as the user expectations for non-functional requirements are not met. Many times, the developers dismiss non-functional requirements as non-testable and therefore not enforceable. This lack of specificity in non-functional requirements sets

Functional Requirements define the basic system behavior. Essentially, they are requirements stating what the system does or must not do, and can be thought of in terms of how the system responds to inputs. Functional requirements usually define if/then behaviors and include calculations, data input, and business processes. Functional Requirements are features that allow the

The term requirement first appeared in software engineering in the 1960s.1) The Business Analysis Body of Knowledge® version 2 from IIBA (BABOK),2) defines a requirement as having one or more of the following characteristics: A condition or capability needed by a stakeholder to solve a problem or achieve an objective. A condition or capability that