A UNIFIED TAXONOMY FOR NON FUNCTIONAL REQUISITES

Abstract

The usefulness of a system is determined by its functionality and also by its non-functional characteristics such as security, reliability, usability, performance, among others. However, these "non-functional" characteristics typically receive little attention and are less understood that the functional ones and, in addition, the literature contains several classifications of non-functional requirements (RNF), making it more difficult the understanding of this type of requirement. This paper aims to propose a taxonomy for non-functional requirements (NFR) developed by unifying diverse taxonomies in the existing literature. The proposed taxonomy covers 90 RNF aspects, and can be used as a guideline during the elicitation of user requirements, a way of organizing the requirements, facilitating the verification and validation and even reuse of these requirements.