• 시스템엔지니어링학술지
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• 제6권2호
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• pp.37-45
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• 2010

Requirements engineering is an important phase in a system's life cycle. It is important to perform it correctly. The increasing complexity of systems makes requirements engineering activities more difficult. Non-functional requirements are drivers to emerge how much emergent system properties to aim for success. All functional requirements may be satifsfied, but if the level of desired non-functional requirements are overlooked, the system development will fail. There is growing awareness of the importance of defining non-functional requirements early in the process among the requirements engineering (RE) community. This paper propses a SysML based approach for non-functional requirements to identify and specify very early in the process or requirements engineering.

• 정보통신설비학회논문지
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• 제9권1호
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• pp.13-18
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• 2010

As the importance of non-functional requirements has increased, many researchers have become interested in the software development process for non-functional requirements including the notation, modeling, and assessment of non-functional requirements. However, the characteristics of non-functional requirements are so sophisticated and there are many topics which have not been solved until now. In order to address one of the unsolved problems, we propose a systematic software development process to support the management of non-functional requirements. The process consists of six steps, each of which is composed of detailed activities. Using the proposed process, the non-functional requirements can be managed and modeled more effectively and systematically than previous ones.

• 한국컴퓨터정보학회논문지
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• 제24권7호
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• pp.19-29
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• 2019

Requirements traceability is regarded as one of the important quality attributes in software requirements engineering field. If requirements traceability is guaranteed then we can trace the requirements' life throughout all the phases, from the customers' needs in the early stage of the project to requirements specification, deployment, and maintenance phase. This includes not only tracking the development artifacts that accompany the requirements, but also tracking backwards from the development artifacts to the initial customer requirements associated with them. In this paper, especially, we dealt with the traceability between functional requirements and non-functional requirements. Among many Information Retrieval (IR) techniques, we decided to utilize Latent Semantic Indexing (LSI) and Latent Dirichlet Allocation (LDA) in our research. Ultimately, we conducted an experiment on constructing traceability by using two techniques and analyzed the experiment results. And then we provided a comparative study between two IR techniques in constructing traceability between functional requirements and non-functional requirements.

• 한국정보과학회논문지:소프트웨어및응용
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• 제33권7호
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• pp.615-623
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• 2006

비기능적 요구사항은 대상 시스템이 지원해야 할 기능적 요구사항의 속성 또는 품질 요구사항을 말하며, 소프트웨어의 품질 속성으로 반영된다. 이러한 비기능적 요구사항은 특히 성능과 관계된 부분의 설계를 결정하기 위한 중요한 기준으로 사용된다. 따라서 비기능적 요구사항은 소프트웨어 개발 생명주기 전반에 걸쳐 계속적으로 고려되고, 관리되어야 한다. 하지만 비기능적 요구사항의 모호성과 비가시적 특성으로 인해 도출 및 명세뿐만 아니라, 관리에도 어려움이 많다. 이에 본 논문에서는 NFR 그래프를 이용해 비기능적 요구사항에 가시성을 부여하고 비기능적 요구사항을 설계에 반영하여 비기능적 요구사항 관리의 효율성을 높이기 위한 비기능적 요구사항의 추적 기법을 제안한다. 비기능적 요구사항 개발 절차에 따라 지능형 조명 제어 시스템의 성능 요구사항 추적 방법을 사례연구로 수행하였으며, 이를 통해 종합적으로 비기능적 요구사항 관리의 효율을 높이고자 한다.

• 컴퓨터교육학회논문지
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• 제9권4호
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• pp.43-54
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• 2006

웹 기반 학습 시스템의 사용자 요구는 일반적으로 기능 요구와 비기능 요구로 구분된다. 그 중 사용자가 원하는 품질 관련 비기능 요구는 개발자가 반드시 검증해야 할 주요 사항이지만 기능 요구와는 달리 확인 과정에 많은 어려움이 있었다. 본 논문은 웹 기반 학습 시스템의 개발에 적용할 수 있는 검증 기법으로서 품질 관련 비기능 요구사항이 적절히 구현되었는지를 검증하는 방법을 제안한다. 특히 효율성, 사용용이성과 같은 품질 요구가 설계에 영향을 주는 과정을 추적해 얻은 정보를 검증에 이용함으로써 이를 비기능 요구가 적절히 구현되었는지 확인할 수 있게 한다.

• 한국컴퓨터정보학회논문지
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• 제25권7호
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• pp.27-37
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• 2020

본 연구의 목적은 다양한 도메인에 대한 소프트웨어 요구사항 명세서로부터 수집된 요구사항을 데이터로 활용하여 데이터 중심적 접근법(Data-driven Approach)의 연구를 통해 요구사항을 분류한다. 이 과정에서 기존 요구사항의 특징과 정보를 바탕으로 다양한 자연어처리를 이용한 데이터 전처리와 기계학습 모델을 통해 요구사항을 기능적 요구사항과 비기능적 요구사항으로 분류하고 각 조합의 결과를 제시한다. 그 결과로, 요구사항을 분류하는 과정에서, 자연어처리를 이용한 데이터 전처리에서는 어간 추출과 불용어제거와 같은 토큰의 개수와 종류를 감소하여 데이터의 희소성을 좀 더 밀집형태로 변형하는 데이터 전처리보다는 단어 빈도수와 역문서 빈도수를 기반으로 단어의 가중치를 계산하는 데이터 전처리가 다른 전처리보다 좋은 결과를 도출할 수 있었다. 이를 통해, 모든 단어를 고려하여 가중치 값은 기계학습에서 긍정적인 요인을 볼 수 있고 오히려 문장에서 의미 없는 단어를 제거하는 불용어 제거는 부정적인 요소로 확인할 수 있었다.

• 한국컴퓨터정보학회논문지
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• 제24권3호
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• pp.65-75
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• 2019

Non-Functional Requirements (NFR) play a crucial role during the software development process. Currently, NFRs are considered more important than Functional Requirements and can determine the success of a software system. NFRs can be very complicated to understand due to their subjective manner and especially their conflicting nature. Self-adaptive systems (SAS) are operating in dynamically changing environment. Furthermore, the configuration of the SAS systems is dynamically changing according to the current systems context. This means that the configuration that manages the trade-off between NFRs in this context may not be suitable in another. This is because the NFRs satisfaction is based on a per-context basis. Therefore, one context configuration to satisfy one NFR may produce a conflict with another NFR. Furthermore, current approaches managing Non-Functional Requirements trade-off stops managing them during the system runtime which of concern. To solve this, we propose fragmentizing the NFRs and their alternative solutions in form of Multi-entity Bayesian network fragments. Consequently, when changes occur, our system creates a situation specific Bayesian network to measure the impact of the system's conditions and environmental changes on the NFRs satisfaction. Moreover, it dynamically decides which alternative solution is suitable for the current situation.

• International Journal of Knowledge Content Development & Technology
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• 제9권4호
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• pp.95-114
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• 2019

The digitization of traditional medical knowledge in Tanzania will greatly enhance its preservation and dissemination. This is especially important given the challenges facing the current methods of preserving and managing such knowledge. This study presents the requirements engineering approaches and requirements for a web-mobile application that would successfully digitize indigenous knowledge of phytomedicine and relevant practitioners licensing and registration processes. To establish the requirements of such a digital system application, the study sought the opinion of 224 stakeholders whose suggestions were used to analyze and model the requirements for designing such a web-mobile tool. The study was carried out in Arusha, Kagera and Dar es Salaam regions of Tanzania which involved ethnobotanical researchers, herb practitioners, curators from herbaria and registrar officers from Traditional and Alternatives Health Practice Council. Structured interview, survey, observation and document review were employed to find out the basic functional and non-functional requirements for possible designing and implementation a web-mobile application that would digitize indigenous knowledge of medicinal plants. The requirements were modelled using the use case and context diagrams. Finally, the study came up with a list of items for both functional and non-functional requirements that can be used as guidelines to develop a web-mobile application that will capture and document traditional medical knowledge of medicinal plants in Tanzania and, enabling relevant authorities to regulate and manage stakeholders.

• 한국IT서비스학회지
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• 제11권2호
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• pp.259-274
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• 2012

A well organized system requirements provide a solid basis of achiving a successful project and are effective methods of communication among stakeholders. We illustrate and propose a 'System Requirement Development Framework' to develop correct requirements as a methodical approach. We first organize a 'Requirement Development Process' and then establish a 'Non-Functional Requirements Principle'. On these basis, we next propose a 'Requirement Development Guideline' from a perspective of 'Functional Requirement', 'Non-Functional Requirement' and 'Triage' in advanced stages. We also verify and evaluate the suitability of our proposed 'System Requirement Development Framework' by applying it to several projects.

• 한국군사과학기술학회지
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• 제11권4호
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• pp.59-67
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• 2008

In the next near future, the human would like to use the small unmanned ground vehicle(SUGV) on the diverse fields. Specially the world of today is tried to apply with operating the task on very difficult working environments such as some dangerous or unreachable area. To work this task, this vehicle should be guaranteed with the high level of reliability, safety, and performance. In this paper, we propose to focus on not only the functional requirements, but also the non-functional requirements based on software architecture at the design stage for developing the embedded system. Through focusing on the non-functional requirements on this software architecture, we can obtain the design goal of the target system and also show the enhancement of reliability, safety and performance with 'Vtune' performance analysis tool.