NFR Modeling Approaches

Non-functional requirements (NFRs) are one of the major concerns in system requirement engineering. NFRs must be considered for a successful software project and thus modeling of NFRs is of equal importance. Unfortunately, most of the available literature is focused on modeling of functional requirements and comparatively less effort is done on modeling of non-functional requirements. In this paper we have conducted a literature survey to find the different approaches available to model non-functional requirements and concluded (on the basis of a quality criterion) that which approach is better than others for this purpose.