Elicitation Of Non-functional Requirements Research Articles

Non-functional Requirements Elicitation in Agile Base Models

The elicitation of non-functional and functional needs is one of the most critical jobs of a requirement engineer. This scenario involves the imposition of limits on non-functional needs, whereas functional requirements call for the operation of a system in order to carry out functionality. Over the last few years, agile software development approaches have gained widespread acceptance in the software industry as a problem-solving paradigm. Non-functional requirements (NFRs) are frequently cited as a point of contention in non-functional requirements (NFR) approaches. As well as functional requirements like speed and efficiency, security is desired, amongst a host of other things. Aspects like usability, security, and privacy must all be taken into account. Functional needs must be treated as though they were first-class under the current industry standard of practice. Functional requirements are distinguished from non-functional requirements by the fact that only implemented requirements can be evaluated. To give an example, this method attracts the attention of the system's end users to a critical defect in its architecture. Projects of this type frequently fail because to dissatisfaction among the target audience. If you'd like a great demonstration, consider the London Ambulance System. When dealing with non-compliance to the necessary degree of detail, it is feasible to raise the likelihood of software success this is the first study of its kind in its sector to bring attention to the most critical NFR issues. The problems that arise during the elicitation stage of requirement engineering in agile base models. It also outlines the techniques and strategies that are being considered. Proposed in the literature as a means of dealing with these problems.

Exploring contextual factors in citizen-initiated platforms to non-functional requirements elicitation

Purpose This paper aims to systematize the contextual factors that influence the intention to use citizens and governments-initiated platforms, presenting them as non-functional requirements (NFRs), to facilitate their understanding to implementers. Design/methodology/approach A systematic mapping of the literature was done to identify the contextual factors from citizens and governments (C2G) adoption, followed by a survey applied to 938 potential users of this type of technology. The results were analyzed through logistic regression to understand the impact of the contextual factors on the intention to use C2G platforms and then those contextual factors were formalized as NFRs represented by a Softgoal Interdependence Graph. Findings Among the results, the most prominent factors were the influence of the “users perceived contribution” and the “citizens concern about the city conditions”. Finally, some strategies are suggested to help public managers and developers to optimize the factors that have shown to be significant. Practical implications This study can support e-gov policies in the implementation of C2G platforms because several municipalities need assistance in taking actions to foster greater citizens’ engagement. An example of this type of contribution is the indication of the factors of greatest impact in the adoption of use and the indication of paths to be followed if the manager and developers decide to focus on each of them. Originality/value The identification of several contextual factors which influence C2G platforms adoption and their systematization with the purpose of jointly visualizing and evaluating them.

Non-Functional Requirements Elicitation

Non-Functional requirements elicitation is one of the most important activity in requirements engineering. Non-functional requirements define the quality attributes of software system. If this analysis is not done properly, it may cause for problems in further phases that in turn may lead to failure of the software. Hence the non-functional requirements analysis has to be given at most priority in software development. This paper presents survey on different approaches proposed for Non-Functional requirements analysis

Evaluation of an approach to define elicitation guides of non‐functional requirements

Non-functional requirements (NFR) elicitation is a complex activity, since it requires specific knowledge in many different areas, such as performance, security, portability and usability. An approach for the definition of NFR elicitation guides (ADEG-NFR) was proposed with the objective of supporting the requirement engineers in carrying out this activity and providing mechanisms for customer involvement in this process. An elicitation guide consists of a set of questions, templates and examples of requirements to make the elicitation process easier using an appropriate language to customer. Besides, appropriate language to the customer's understanding is the natural language described in a clear way, avoiding the use of technical terms. This study evaluates the results of the experience of use of ADEG-NFR in a software development organisation. Results have shown that ADEG-NFR fulfills its purpose. In addition, the ADEG-NFR evaluation process has identified opportunities for improvement that can help in the evolution and adoption of ADEG-NFR by different organisations in the industry.

Classification of NFRs for Information System

Software requirements are broadly classified into two parts, i.e., functional requirements (FR) and non-functional requirements (NFRs). In recent year, NFRs have received much attention by requirements engineering community. This can be verified from the importance of the NFR framework. This framework was developed to elicit and model only the NFRs. There are different NFRs for different types of system like information system, web based system, real time system etc. Elicitation of NFRs for these types of systems is an important research issue. Therefore, the objective of this paper is to classify various NFRs for Information System so that requirements analyst can easily identify the complete list of NFRs according to their need in early phase of requirements engineering.

Elicitation and Modeling Non-Functional Requirements – A POS Case Study

Proper management of requirements is crucial to successful development software within limited time and cost. Nonfunctional requirements (NFR) are one of the key criteria to derive a comparison among various software systems. In most of software development NFR have be specified as an additional requirement of software. NFRs such as performance, reliability, maintainability, security, accuracy etc. have to be considered at the early stage of software development as functional requirement (FR). However, identifying NFR is not an easy task. Although there are well developed techniques for eliciting functional requirement, there is a lack of elicitation mechanism for NFR and there is no proper consensus regarding NFR elicitation techniques. Eliciting NFRs are considered to be one of the challenging jobs in requirement analysis. This paper proposes a UML use case based questionary approach to identifying and classifying NFR of a system. The proposed approach is illustrated by using a Point of Sale (POS) case study

Tactics based approach for integrating non-functional requirements in object-oriented analysis and design

Non-Functional Requirements (NFRs) are rarely treated as “first-class” elements in software development as Functional Requirements (FRs) are. Often NFRs are stated informally and incorporated in the final software as an after-thought. We leverage existing research work for the treatment of NFRs to propose an approach that enables to systematically analyze and design NFRs in parallel with FRs. Our approach premises on the importance of focusing on tactics (the specific mechanisms used to fulfill NFRs) as opposed to focusing on NFRs themselves. The advantages of our approach include filling the gap between NFRs elicitation and NFRs implementation, systematically treating NFRs through grouping of tactics so that tactics in the same group can be addressed uniformly, remedying some shortcomings in existing work (by prioritizing NFRs and analyzing tradeoff among NFRs), and integration of FRs and NFRs by treating them as first-class entities.

Non-functional requirements analysis: deficiencies in structured methods

This paper examines some deficiencies in structured systems development methods that have the effect of overlooking non-functional requirements. Evidence from four case studies shows that non-functional requirements are often overlooked, questioning users is insufficient, methodologies do not help in the elicitation of non-functional requirements and there is a lack of consensus about the meaning and utility of non-functional requirements. Some lessons are drawn from the domain of real time systems development. Finally a framework is advanced for taking a stakeholder approach to the conflict and organisational change issues associated with the elicitation stage of requirements analysis.