Requirements standards and textbooks typically classify requirements into functional requirements on the one hand and attributes or non-functional requirements on the other hand. In this classification, requirements given in terms of required operations and/or data are considered to be functional, while performance requirements and quality requirements (such as requirements about security, reli...

As achieving high quality means the realization of customers needs, requirements engineering (RE) is the most crucial phase within software development. In the RE process not only the functional requirements but also the so-called ‘non-functional’ or ‘quality’ requirements of the planned software system have to be elicited from the customer and represented in a requirements document in order to...

Privacy as a software quality is becoming more important these days and should not be underestimated during the development of software that processes personal data. The privacy goal of intervenability, in contrast to unlinkability (including anonymity and pseudonymity), has so far received little attention in research. Intervenability aims for the empowerment of end-users by keeping their pers...

Object-oriented analysis and design have been more concerned with system functionality, neglecting non-functional aspects; the result is code which is tangled and difficult to maintain, contradicting main principles of object orientation. Aspect Oriented Software Development (AOSD) proposes the early specification of non-functional requirements. However, a standard and homogenous vision of the ...

Non-functional requirements (NFRs), sometimes termed quality, or quality of service, attributes or requirements, have been a topic of interest within systems engineering, software engineering, and requirements engineering for a considerable period of time. NFRs have been for too long overlooked during the development of software systems. This has led to numerous cases of failure resulting in ov...

: One of the tools for the architectural advent form is the structure, while architecture and structures, particularly in our sociable Iran, are separated from each other. Most successful buildings have dominating designers who are proficient in structural issues and have a comprehension of the structural system's behavior. The extent of attention to the structure of the building will inevitabl...

Web Services (WS) have become one the most used technologies nowadays in software systems. Among the challenges when integrating WS in a given system, requirementsdriven selection occupies a prominent place. A comprehensive selection process needs to check compliance of Non-Functional Requirements (NFR), which can be assessed by analysing WS Quality of Service (QoS). In this paper, we describe ...

Non-functional requirements (NFRs) have been the focus of research in Requirements Engineering (RE) for more than 20 years. Despite this attention, their ontological nature is still an open question, thereby hampering efforts to develop concepts, tools and techniques for eliciting, modeling, and analyzing them, in order to produce a specification for a system-to-be. In this paper, we propose to...

One of the challenges faced by the developers of current Multimedia Educational Software (MES) is the assessment of MES to meet users’ requirements. Non Functional Requirements (NFR) are key users’ requirements, because unlike functional requirements, which set out services expected by system, NFRs set out the constraints of the system and the process standards to be followed. Therefore, they p...