• Journal of Internet Computing and Services
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• v.17 no.6
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• pp.61-69
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• 2016

Software testing is an activity to find defects included in software through creating test cases from the software system specification. In order to perform software testing effectively, it is required to prepare the full test plan, to create well-defined test cases, and to execute test monitoring activities systematically. Most existing researches for the test approaches focus on automating the activities from the test cases generation to the test execution. Contrary to those approaches, we study automatic approaches for test monitoring activities. For this, we identify the research issues that should be solved to automate test monitoring activities. Next, with those solutions, we suggest the construction method for an automatic framework for test monitoring.

• Journal of Internet Computing and Services
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• v.20 no.1
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• pp.87-96
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• 2019

In this paper, we propose a MapReduce-supported clustering technique for collecting and classifying distributed workflow enactment event logs as a preprocessing tool. Especially, we would call the distributed workflow enactment event logs as Workflow BIG-Logs, because they are satisfied with as well as well-fitted to the 5V properties of BIG-Data like Volume, Velocity, Variety, Veracity and Value. The clustering technique we develop in this paper is intentionally devised for the preprocessing phase of a specific workflow process mining and analysis algorithm based upon the workflow BIG-Logs. In other words, It uses the Map-Reduce framework as a Workflow BIG-Logs processing platform, it supports the IEEE XES standard data format, and it is eventually dedicated for the preprocessing phase of the ${\rho}$-Algorithm that is a typical workflow process mining algorithm based on the structured information control nets. More precisely, The Workflow BIG-Logs can be classified into two types: of activity-based clustering patterns and performer-based clustering patterns, and we try to implement an activity-based clustering pattern algorithm based upon the Map-Reduce framework. Finally, we try to verify the proposed clustering technique by carrying out an experimental study on the workflow enactment event log dataset released by the BPI Challenges.

• Journal of KIISE:Computing Practices and Letters
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• v.16 no.12
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• pp.1239-1243
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• 2010

The web environment is evolving rapidly. Testing in the web based software is an essential process to improve stability and productivity. Testing of complex web contents and ill(user interface) is most important thing. Implemented test cases are efficient when they are automated and reusable. But, most of the testing automation tools are focused on technical accessibility and functions still. A collaboration of the persons concerned and reusability of implemented test case are ignored. In this paper we propose an efficient way to design automated test case in web environment, and to share and pattern automated test cases we introduce testing framework called NTAF(NHN Test Automation Framework.). The NTAF is based on open source framework. It provides integrated testing environment that web testing cane be automated and managed continuously.

• Journal of KIISE
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• v.44 no.3
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• pp.261-274
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• 2017

Variability management is the foremost criterion that defines the extent to which complexities can be handled in a system. Predominantly, the requirements' engineering (RE) study overlooks, or speculates a consistent behavior of, the environment in which a system functions. In real-time systems it is vital to observe and adjust to an intrinsically changing context. Therefore, in this work we identify the requirements of the system in various contexts by recommending a framework using i* goal model, problem frames, use case maps and live sequence charts. The framework is illustrated using a case study of the smart grid RTP system. In the case study, elaboration of scenarios using use case maps and live sequence charts proved beneficial as they assisted in early analysis and validation of contexts. In addition, the elaboration of requirements for obstacle and conflict analysis assists the requirements engineer to increase the robustness of the system. The proposed framework is evaluated theoretically and by empirical study.

• Journal of KIISE
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• v.42 no.11
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• pp.1339-1348
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• 2015

In a distributed system environment based on a service-oriented architecture, separate systems collaborate to achieve the goals of the entire system by using services provided other systems. A service quality violation from using one service can cause runtime system failure in the environment. The existing self-adaptation methods follow fault tolerance mechanism that responds to a failure after a service quality violation. In other words, these methods are limited to responsive action. Therefore, a service-dependability-case based self-adaptation mechanism is necessary to preserve the dependability of the self-adaptive system. This paper demonstrates that the service-dependability-case based self-adaptation mechanism is better than QoS(quality of service)-based self-adaptation with fault tolerance to preserve the dependability of the self-adaptive system. Additionally, this paper suggests a method to present and analyze service dependability by using GSN(Goal Structuring Notation) which is the existing modeling method for the presentation of assurance cases, an action mechanism adapted using an analysis result of service-dependability-cases, a methods of leveraging the service-dependability-case based self-adaptation mechanism by following the service's life cycle, and the framework architecture including the major components and the interactions between the components in the control loop of the self-adaptation process.

• The KIPS Transactions:PartD
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• v.16D no.4
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• pp.595-612
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• 2009

The early test can greatly reduce the cost of error correction for system development. It is still important in SOA based service system. However, the existing methods of test case generation for SOA have limitations which are restricted to only web service using XML. Therefore, this paper proposes a method of test case generation using BPMN-based model reduction for service system. For minimizing test effort, an existing BPM is transformed into S-BPM which is composed of basic elements of workflow. The process of test case generation starts with making S-BPM concerning the target service system, and transforms the target service system into directed graph. And then, we generate several service scenarios applying scenario searching algorithm and extract message moving information. Applying this method, we can obtain effective test cases which are even unlimited to web service. This result is the generation of test case which is reflected in the business-driven property of SOA.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10b
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• pp.151-153
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• 2003

기업의 비즈니스 프로세스를 관리하는 역할을 하는 워크플로우 시스템에서 대용량의 비즈니스 업무를 처리하기 위한 초대형 워크플로우 시스템을 구성하고자 할 때 중요한 문제 중의 하나는 대량의 비즈니스 프로세스 인스턴스를 유지 및 관리하는 문제이다. 본 논문에서는 초대형 워크플로우에 대한 개념을 조사하고 초대형 워크플로우 시스템을 위하여 제안된 워크케이스 기반 워크플로우 구조를 이용하여 성능평가를 위한 기본적인 워크플로우 기능인 비즈니스 프로세스 처리부분에 초점을 맞춘 워크플로우 시스템을 설계 및 구현한다. 구현된 워크플로우 시스템으로 예제 프로세스인 고용 프로세스를 정의하여 몇 개의 고용 프로세스를 유지 및 관리 할 수 있는 지를 분석하여 본 논문의 초대형 워크플로우 시스템의 성능을 평가한다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06c
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• pp.184-186
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• 2006

테스트 주도 개발은 익스트림 개발 방법론의 바탕이 되는 방법론이다. 테스트 주도 개발은 소스 코드를 구현을 하기 전에 테스트 케이스를 먼저 만드는 작성한다. .Net 개발 환경에서 테스트 주도 개발을 하기 위해 NUnit 이라는 유닛 테스트 프레임워크를 많이 사용하고 있다. [1] 본 논문은 NUnit 유닛 테스트 프레임워크를 기반으로 리플랙션을 사용하여 유닛 테스팅 자동화 도구의 제작을 위한 프레임워크를 제안한다. 그리고 이 프레임워크를 이용하여 유닛 테스트 뼈대를 자동으로 생성하는 프로그램을 구현하였다.

• Annual Conference of KIPS
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• 2021.05a
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• pp.55-58
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• 2021

우주 네트워크는 고지연성, 저신뢰성 등 기존의 지상 네트워크와는 차별화된 특성을 가진다. 또한 높은 예산이 투입되는 우주 임무 특성상 지상 시험 시 발견되지 않은 소프트웨어 버그가 막대한 비용을 초래할 수 있다. 그러나 현재까지 우주 네트워크 환경에 특화된 소프트웨어 업데이트 관련 연구는 부족한 실정이다. 따라서 본 연구에서는 Asynchronous Management Protocol(AMP)을 기반으로 원격 소프트웨어 업데이트 프레임워크를 새롭게 제안한다. 해당 프레임워크는 Interplanetary Overlay Network(ION) 소프트웨어를 사용하여 프로토타입을 구현하였으며, 실제 업데이트 케이스를 적용하여 기능 및 실사용성을 검증하였다.

• Convergence Security Journal
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• v.7 no.4
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• pp.51-60
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• 2007

It is important to assess vulnerability of network and information system to countermeasure against a variety of attack in effective and efficient way. But vulnerability and risk assessment methodology for network and information systems could not be directly applied to sensor networks because sensor networks have different properties compared to traditional network and information system. This paper proposes a vulnerability assessment framework for cluster based sensor networks. The vulnerability assessment for sensor networks is presented. Finally, the case study in cluster based sensor networks is described to show possibility of the framework.