• 정보처리학회논문지D
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• 제8D권4호
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• pp.401-408
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• 2001

객체지향 모델은 구조적 모델에 비해 모듈성, 재사용성, 유지보수성, 확장성 등의 장점을 제공한다. 이러한 이유로 객체지향 소프트웨어 개발 방법들을 정보 시스템 개발에 광범위하게 적용되고 있다. 그러나 현재의 객체지향 소프트웨어 개발 방법들은 목적 소프트웨어 시스템의 객체지향 모델링을 지원할 뿐, 방법론 그 자체는 구조적 및 절차적 체계를 기반으로 하고 있다. 본 논문에서는 객체지향 소프트웨어 개발 방법론을 객체지향적으로 모델링한 OMOS(Object-oriented software development Method for Object-oriented software System)를 제시한다. OMOS에서는 개발 산출물과 관련된 활동이 객체로써 모델링 되며, 개발 생명주기 프로세스가 객체간의 상호작용으로 모델링 된다. 소프트웨어 개발 방법론의 객체지향적 모델링은 방법론 자체의 재사용성, 유연성, 확장성, 유지보수성의 용이성 등의 장점을 제공한다.

• 디지털산업정보학회논문지
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• 제7권3호
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• pp.37-42
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• 2011

Nowadays software developers are moving from conventional software process technologies to the object-oriented paradigm. To develope the object-oriented softwares efficiently, various software metrics have been suggested. Coupling refers to the degree of independence between components of the system. It has long been well known that good software practice calls for minimizing coupling interaction. Many researches have been studied coupling metrics of the object- oriented systems. We review Chidamber and Kemerer's work & Li's work. In this paper, we study the coupling of the overall structures of object-oriented systems by analyzing the class diagram of UML. We propose four coupling metrics for object-oriented softwares. First, we use an established coupling metric for object- oriented systems as a basic coupling metric. Then we modify the basic coupling metric by including indirect coupling between classes, We also suggest two relative coupling metrics to measure coupling between subsystems. We investigate the theoretical soundness of the proposed metrics by the axioms of Briand et al. Finally, we apply the presented metrics to a practical case study. This coupling metric will be helpful to the software developers for their designing tasks by evaluating the coupling metric of the structures of object-oriented system and redesigning tasks of the system.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 ITC-CSCC -2
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• pp.723-726
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• 2000

In this paper, we present an abstract object-oriented plat-form model .suitable for the real-time distributed telecommunication system. The proposed platform is constructed upon the extended version of the real-time, distributed operating system, SROS(Scalable Real-time Operating System), that is developed at ETRI and successfully operated in the ATM switching system for several years. The object-oriented software development and maintenance methodology will resolve the current software crisis in the area of telecommunication and switching systems due to the everlasting maintenance about the huge amount of the existing software and the ever increasing needs for the better and new communication services. In general, an object-oriented software platform realizes the object-oriented methodology and possesses many good aspects like high productivity, better reusability, easy maintenance, et at. The platform is also designed to present the distributed multimedia service in addition to real-time event delivery. Recently, we have been implementing a couple of prototype bated on the proposed platform. Reflecting the evaluation results from these prototypes, the final platform specification will be determined.

• 한국정보처리학회논문지
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• 제2권3호
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• pp.299-313
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• 1995

객체 지향 설계 방법은 프로그램을 객체로 분해하고, 그들 사이의 관계를 설정하 는 과정으로 기존의 시스템이 수행하는 기능 중심 방법과 달리 취급하는 객체를 중심 으로 모듈을 분해하는 기법이다. 그러나 기존의 객체 지향 설계 방법은 모듈 설계 방 법과 분해 기준이 모호하고 미흡하기 때문에 객체 지향 소프트웨어를 전체 시스템 단 위로 구현해야 하고, 하나의 소프트웨어 컴포넌트를 이해하기 위해서는 전체적인 객체 설계 모델 및 응용 프로그램을 분석해야 하는 많은 문제점이 발생한다. 따라서 본 논 문에서는 객체 지향 설계를 위한 모듈 분해 기준을 정형화 하고, 이를 이용한 객체 모 듈 설계 절차를 제시하여, 규모가 크고 복잡한 시스템을 개발하는데 있어 실용성과 시 스템 개발 후 유지보수를 원활하게 할 수 있도록 한다. 그리고 본 논문의 모듈 분해 기준을 실 시스템에 적용한 사례를 통하여 설계 모델과 구현 모델간의 일치성을 보이 고자 한다.

• 한국정보처리학회논문지
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• 제6권3호
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• pp.622-632
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• 1999

As the complexity of software development is increasing due to networking, multimedia, and diverse system architecture, the need for effective software development methodology is increasing. Especially, due to software standard and internalization of software market, it is necessary to accept international quality such as ISO 9000-3. In addition, object oriented development methodology is required due to rapid propagation of OO technology and standardization. Recently, UML was accepted by the OMG as standard object-oriented modeling language for distributed environment. When we UML was accepted by the OMG as standard object-oriented modeling language for distributed environment. When we develop Java and CORBA-based software, often UML is applied to Java and CORBA-based projects. However, current structural or OMT-based object-oriented methodologies. In this paper, we proposed UML-based development and concrete guidelines for each phase in order to apply UML to software development practically and effectively. Also, we define the transition guidelines and semantics between various development tasks. In addition, the analysis and design techniques of user interface and system development techniques needed in Web application development are presented.

• 정보처리학회논문지D
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• 제11D권3호
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• pp.649-658
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• 2004

객체지향 시스템은 상호 작용하늘 객체들의 집합으로 구성되었고 시스템의 행위는 객체들의 협력 행위로 표현된다. 객체지향 소프트웨어의 상속성, 다형성 등 특성들은 소프트웨어 테스팅에 어려움을 증가시키고 객체의 병행성, 동적바인딩, 상호작용 등 동적인 면들은 프로그램의 실행 시간에 한 멤버 함수의 호출에 의해 여러 멤버함수로 바인딩될 수 있다. 그러므로 객체지향 소프트웨어의 특성들을 고려하고 동시에 객체들간의 상호착용을 테스트하기 위한 연구가 필요하다 이 논문에서 상속성, 다형성 등 특성을 고려하여 평탄화된(Flattened) 상태차트 다이어그램을 구성하고, 시스템 모델링과 시뮬레이션에 전형적으로 사용되는 CPN(Colored Petri net)으로 모델링 한 후 Design/CPN 툴에 적용하여 객체지향 소프트웨어 객체들간의 상호작용 테스트를 자동화할 수 있는 테스트 레이스 생성 기법을 제안한다.

• 산업경영시스템학회지
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• 제20권42호
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• pp.49-57
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• 1997

As a software development methodology, object-oriented paradigm that has execellent reusability, portability, and extensibility, is currently being used in many application fields. Especially, UML(Unified Modeling Language), which is recently released as a third generation methodology for the object-oriented system development, has many advantages such as generalization, certainty, visualization. For this reason, the usability of UML in manufacturing system control is expected to increase. In this paper, analysis and design of FMC control system are peformed by UML. Software objects to accommodate the dynamic environment of FMC operations are modeled by using the diagrams of UML. The objective of this paper is to suggest a generic framework to design FMC control software.

• 한국정보처리학회논문지
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• 제6권3호
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• pp.580-588
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• 1999

The reuse of software components from existing software system enhances productivity and reliability, decreases the cost of production in software development. The extraction of software components with high reusability from existing software system is very important in software reuse. The reuse of a class is classified into white-box reuse to reuse with modification and black-box reuse to reuse without modification. A class has the property of procedural language and object-oriented language. Therefore, it must measure reusability in consideration of two properties. In black-box reuse, independence of class is important quality. It can quantify through information hiding, coupling between objects, cohesion, etc. In white-box reuse, modification is the best important quality. It can quality through class complexity, coupling, cohesion, documentation, etc. We propose a new model for measurement of class reusability and the measure criteria in object-oriented program. A class that is measured by proposed model can judge whether the reuse with modification has the advantage or the reuse without modification has the advantage.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2000년도 춘계학술대회 논문집
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• pp.284-291
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• 2000

Interlocking software used in the electronic interlocking has been implemented through the structured approach until now. But there was the demerit that interlocking software has some problem in the standardization and the maintenance because of the limit in structured approach. Object-Oriented method overcoming this demerit was specified in the design step and the analysis step. There were object model, dynamic model and functional model in the analysis step and there were also two steps which were system design and object design in the design step. In this paper, Interlocking software was designed using Object-Oriented method to improve the standardization and the maintenance of the electronic interlocking. The electronic interlocking was analyzed with object modeling, dynamic modeling and functional modeling.

• 산업경영시스템학회지
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• 제22권52호
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• pp.285-295
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• 1999

Developing control functions that operate and cooperate each equipment in order to achieve a goal is one of the most important problems in the installation of automated manufacturing systems. This paper discusses the development of a control system for heterarchical architecture and a simulator to verify operations of the control system. The object-oriented paradigm that has excellent reusability, portability, and extensibility is currently being used in many application fields as a software development methodology. Especially, UML(Unified Modeling Language), the third generation object-oriented modeling methodology, has advantages such as model generalization, clearness, and so on. In this research, software objects to accomodate the real time environments of automated manufacturing systems are modeled with the diagrams of UML. Based on these models, control software is developed as a format of pseudo-codes. A simulator is implemented to validate the developed control system.