• Journal of KIISE:Software and Applications
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• v.29 no.9
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• pp.619-630
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• 2002

The various software engineering techniques have been come out in order to cope with the software crisis since 1980's. The software Engineering has focused on the process of software component development. The process products a development guide for a quality and productive improvement of software. But, most of the methodologies assume that a new system will be constructed and reused in the future. these do not actually support efficiently how we reuse legacy system's resources and construct a new system. In this paper, we present an efficient Reengineering Process for reusing legacy systems, RUP+re, which extends and customizes RUP. Rup+re consists of Reverse Engineering Workflow, Re-Engineering Workflow and forward Engineering Process. We describe RUP+re's workflows with their own detail steps and verify them practically through the case study. So, we provide efficient guidelines to the software Reengineering process construction which reuses the resources of a legacy system.

• The KIPS Transactions:PartD
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• v.12D no.7 s.103
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• pp.993-1000
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• 2005

Recently, software quality evaluation based on ISO/IEC 9126 and ISO/IEC 14598 has been widely accepted in various areas. However, these standards for software quality do not provide practical guidelines to apply the quality model and the evaluation process of software product=5. And the qualify management in most software projects has been conducted by managing defects without applying the standards for software qualify. Thus, we present a quantitative quality evaluation approach of artifacts in the Component Based Development (CBD). Particularly, our evaluation approach allows most of the standard evaluation process and adopts a quantitative quality model which uses the weights of quality characteristics obtained through carefully selected questionnaires for stakeholder and Analytic Hierarchical Process(AHP). Moreover, we have also examined the proposed evaluation approach with applying the checklists for the artifacts of the CBD to a small-scale software project. As a result, we believe that the proposed approach will be helpful for acquiring the high quality software.

• Journal of Internet Computing and Services
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• v.5 no.4
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• pp.11-22
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• 2004

Works that improve the process and notify the improved process, the product and the change of tasks to all users are essential in achieving project. Existent project management tools support the definition and the change of project activities, and configuration management tools support version check, workspace management. build management. etc. It costs too much to buy each tool. as well as, it is burdensome to learn usage for various tools. Therefore the web-based integrated tool is proposed to manage the process and artifacts at a time in this paper. The proposed tool defines component based development process model. and achieves recording of process progression, processing the request of change, reporting the progression of each task, product registering and change, version recording, artifact or form search, etc. using ebXML. Furthermore, the stakeholders get the systematic management and standardization by sharing information that are necessary in process achievement and configuration management in distributed environment using the integrated management tool.

• Journal of KIISE:Software and Applications
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• v.37 no.7
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• pp.518-535
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• 2010

Cloud Computing is emerged as an effective reuse paradigm, where service providers operate hardware and software and as a service, and service consumers invoke the service through Internet. Software-as-a-Service (SaaS) is a type of cloud services, where the whole software is designed as a service so that several consumers can reuse the SaaS. While tradition software applications are developed for a specific organization, SaaS is developed for multiple users in the various organizations. Hence, reusability is very essential characteristic of SaaS. Reusability is defined as a metric of how effective and efficient software functionalities can be used by various users. Reusability in SaaS is evaluated by considering three sub-characteristics; applicability, adaptability, and scalability. Since such a SaaS has considerable differences and characteristics from traditional software applications, conventional methods including object-oriented modeling, component-based development method, and service-oriented architecture (SOA) service development method would be limited in developing services which can fulfill these three sub-characteristics related to reusability as well as SaaS-intrinsic characteristics. Hence, there is a great demand for effective processes for developing SaaS cloud services. In this paper, we present a practical process for developing SaaS, which focuses on ensuring reusability. And by performing a case study with our proposed SaaS development process, we evaluate applicability of our proposed process and explain how the process is used in a real domain. Then, we compare our proposed process with others for verifying our study. Through the proposed process, cloud services with high quality can be more effectively developed.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.11a
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• pp.267-270
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• 2004

실시간 운영체제는 임베디드 환경에서 매우 중요한 소프트웨어 컴포넌트이다. 임베디드 실시간 운영체제는 고안전성 시스템이나 유비쿼터스 시스템 내에서 강하고(Robust), 신뢰성(Reliable)있고, 안전한(Safety) 특성을 지녀야 한다. 근래에는 이러한 실시간 시스템을 UML 과 같은 모델 기반의 방법으로 설계하고 코드 생성을 통해 구현까지 이끄는 모델 유도 공학(Model Driven Engineering: MDE)[1]을 통해서 개발하고 있다. 이러한 MDE 의 모델은 대부분 UML 기반의 언어를 사용하여 아키텍처를 구성하고 설계하여 코드를 생성하여 구현 코드를 생성해 낸다. 본 논문에서는 이러한 MDE 의 비정형적 언어를 대신하여, 정형명세 언어를 사용하여 실시간 시스템의 모델을 설계하고 이를 검증하여 실시간 운영체제를 개발하는 방법론을 기술한다. 이렇게 함으로써 보다 엄격한 언어를 통해 시스템의 설계의 모호함이나 모순을 없애고, 수학적 기반의 검증을 통해 보다 안전하고 신뢰성 있는 시스템을 구현하자 한다.

• The Journal of Society for e-Business Studies
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• v.8 no.2
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• pp.77-98
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• 2003

A web-based information system, that is a dominant type of information systems, suffers from the "web crisis" in development and maintenance of the system. To cope with the problem, a technology of software clustering to web-based application, which is one of web engineering, is strongly needed. In this paper, we propose a Form Clustering Algorithm along with an application example, which are used for internal-system reengineering to web-based information system. A Form Clustering Algorithm focuses on Page-model which is the feature of the web among the various web-based information system's structural model. Specially, we applying distance matrix to navigation model of graph form for easily analyzing, and web log analysis for identifying core function object that have a highly loading. Also, we create web software structure that can be used to maximize reusability and assign hardware effectively through 2-phase clustering step. Form Clustering Algorithm might be used at web-based information system development and maintenance for reusable web component development and hardware assignment, respectively.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.45 no.2
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• pp.18-25
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• 2008

The traditional a roaches to software development, such as XP, UP, CBD and other CASE tools, are useful for constructing various software components. However, they are not designed to face the challenges of open environments that focus on service. The Service-Oriented Architecture(SOA) is a component architecture that interconnects an application's different functional units, called services. SOA provides a good way to integrate the business process through well-defined interfaces and contracts between business services. In this paper, we propose a method of business process modeling based on SOA with a P2P approach. Also, A P2P business process modeling system is presented. This, results in admitting the reality of enterprise that changes on the basis of services, and suggests more efficient and visual direction for the process integration between enterprises.

• Journal of the Korea Society for Simulation
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• v.19 no.2
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• pp.51-62
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• 2010

Modeling and Simulation techniques are useful to construct executable battlefields and forces on computers, and have been utilized to analyze effectiveness of weapon systems in the computerized war environment. However, most weapon simulations so far have exhibited low reusability and extensibility, since they have been developed for specific simulation objectives with different structures and simulation engines. In this paper, we identify requirements for defense modeling and simulation activities and propose a simulation engine to support the identified requirements. We define the software architecture of the proposed engine, in a way to efficiently provide usability, component-based reusability, interoperability, and reuse-based development.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2005.11a
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• pp.453-460
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• 2005

P2P(Peer to Peer) 기술은 잠재적 능력에도 불구하고 컨텐츠의 저작권문제와 보안문제 등으로 인하여 많은 사람들이 충분히 활용하지 못하고 있다. 본 연구는 인터넷 사용자(개인)와 소규모 서버를 운영하는 조직들이 정보 제공, 분배, 공유의 정보시스템 구조를 자신들의 목적에 맞게 자유롭게 만들 수 있는 프레임워크인 오픈웨어 (Openware)의 개발에 관한 것이다. 오픈웨어는 P2P기반 시스템으로 다음과 같은 특징올 갖는다. 1) 다수의 서버와 클라이언트로 이루어지는 구조로, 사용자의 목적에 맞게 집중형 혹은 분산형 구조를 자유롭게 혼합하여 정보시스템을 구성 할 수 있다. 이러한 정보 구조의 유연성은 다양한 형태의 협업(개인과 개인, 개인과 그룹, 그룹과 그룹)이 요구되는 응용 시스템의 기반을 제공한다. 2) 데이터 관점에서 오픈웨어는 개인이 데이터베이스를 손쉽게 생성, 관리 할 수 있고, 자신의, 데이터 혹은 데이터베이스 구조를 다른 사람이나 그룹과 공유 하거나 통합 할 수 있다. 3) 데이터 통신면에서 오픈웨어는 HTTP(HyperText Transfer Protocol) 프로토콜만을 사용하는 웹 기반 시스템으로 인터넷에 연결 되어있는 누구와도 오픈웨어를 통해 협업이 가능하다. 4) 소프트웨어 이름에서 알 수 있듯이 오픈웨어는 Java, JSP, Apache, Resin등 공개소프트어로 만들어져 있고, 오픈웨어 자체도 공개소프트웨어이다. 오픈웨어는 개인과 그룹의 흠페이지 생성과 관리, 파일 공유 기능이 구현 되어있고, 데이터베이스 공유, 통합 기능을 이용하여 개인이나 그룹의 주소록관리, 일정관리 등이 가능하다. 오픈웨어는 사용자 흑은 개발자가 다양한 형태의 응용컴포넌트를 자유롭게 등록하여 기능을 추가 할 수 있는 확장성올 제공하고 있어서, 앞으로 e-메일, 매신저, 전자결재, 지식관리시스템, 인터넷 방송 시스템의 기반 구조 역할을 할 수 있다. 현재 오픈웨어에 적용하기 위한 P2P 기반의 지능형 BPM(Business Process Management)에 관한 연구와 X인터넷 기술을 이용한 RIA (Rich Internet Application) 기반 웹인터페이스 연구를 진행하고 있다.

• The KIPS Transactions:PartD
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• v.14D no.7
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• pp.773-782
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• 2007

Software produce line engineering is a method that prepares for future reuse and supports seamless reuse in the application development process. Analyzing the commonality and variability between products in a product line is one of the essential concerns that must be considered when building a product line. In this paper, we suggest to combine a product line engineering approach with RFID applications technology. More concretely, common activities are identified among the RFID-enable applications and the variability in the common activities is analyzed in detail. Then, we suggest reusable product line architecture as a product line asset. In addition, as a tool for supporting this research, a framework which provides both reusable product line architecture for REID applications and the components that implement concrete realization of the architecture is developed. Sharing a common architecture and reusing assets to deploy recurrent services may be considered an advantage in terms of economic significance and overall quality.