• Korean Journal of Construction Engineering and Management
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• v.17 no.3
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• pp.125-133
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• 2016

The Project Risk Management is intended to result in the effective management by identifying in advance and mitigating all significant risks including project risks and opportunities during the entire project life cycle - from project inception to completion of construction. It is impossible to predict an exact budget and construction duration before finishing a project. So, Washington Department of Transportation mandates that workshop-based risk management is conducted for projects over specific cost. However, the domestic construction sites have depended on numerical risk analysis without any workshop and efficient risk management have not made. Therefore, in this study, we propose the effective risk management using the RBES program which is very useful for workshop-based risk management and pre & post mitigation, by workshop-based risk management techniques. This proposed risk management approach is applied to a domestic 'A' river recovery project. It is concluded that we may expect the effect to mitigate the total cost overrun problem and the construction duration delay effect in the project by identifying significant risks and by preparing effective risk mitigation strategies.

• Korean Journal of Construction Engineering and Management
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• v.12 no.5
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• pp.23-34
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• 2011

Reliable progress management at construction requires integrated information of cost and schedule, and information is used as a basis for project performance measurement. However, separate handling of cost and schedule information at construction projects makes objective measurement more difficult and decreases management productivity due to additional works for breaking down bill of quantities into corresponding activities. Recently, research related to BIM addresses issues on effective progress management based on BIM with incorporation of daily progress management. Therefore, the objective of this paper is to propose information model for daily progress rate and budgeted cost of work performed by utilizing BTM-based quantity and location information.

• International conference on construction engineering and project management
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• 2013.01a
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• pp.592-595
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• 2013

Advent of Wireless Sensor Networks (WSN) has provided potentials to a variety of construction applications. It is well appreciated that WSNs have advantages over traditional wired system, such as ease of installation and maintenance with increased cost savings and efficiencies. However, the obstruction of wireless signal from physical objects in the heterogeneous construction environment often brings challenges to WSN measurement system. This paper analyzed the obstruction characteristic of construction environment where construction materials, equipment, and built structures obstruct the wireless signal yielding negative effect of measurement system. By adopting evaluation criteria, such as packet reception rate, field experiments have been implemented to quantitatively identify the interference of wireless signal from penetration, reflection, and network traffic under the construction environment. The results show that reliable performance of wireless sensor in construction environment depends on the optimal separation distance between a receiver and a transmitter, obstruction types, obstruction thickness, and transmission interval. In addition, the methodology and experimental results of this paper could be used in the practical design of network topology when hundreds of sensor nodes form a mesh network in the large scale construction applications.

• The KIPS Transactions:PartD
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• v.13D no.4 s.107
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• pp.583-592
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• 2006

Software development based on product lines has been proved a promising technology that can drastically reduce cycle time and guarantee quality by strategically reusing quality core assets that belong to an organization. However, how to measure within a product line is different from how to measure within a single software project in that we have to consider the aspects of both core assets and projects that utilize the assets. Moreover, the performance aspects of overall project lines need to be considered within a product line context. Therefore, a systematic approach to measure the performance of product lines is essential to have consistent, repeatable and effective measures within a product line. This paper presents a context-based measurements elicitation approach for product lines that reflects the performance characteristics of product lines and the diversity of their application. The approach includes both detailed procedures and work products resulting from implementation of the procedures, along with their templates. To show the utility of the approach, this paper presents the elicited measurements, especially for technical management practices among product line practices. This paper also illustrated a real application case that adopt this approach. The systematic approach enables management attributes, i.e., measurements to be identified when we construct product lines or develop software product based on the product lines. The measurements will be effective in that they are derived in consideration of the application context and interests of stakeholders.

• Journal of Korean Society for Quality Management
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• v.46 no.1
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• pp.113-134
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• 2018

Purpose: The purpose of this study was to clarify the causal relationship and correlation between audit quality and audit performance and to analyze theoretical discussions and actual facts in order to improve audit performance on public enterprise audit and to identify what factors contribute to management and to seek ways to secure business performance. Methods: In this study, theoretical consideration was conducted that concerned the definition of audit, the concept of internal audit, the audit quality and the audit performance after having considered advanced researches, related regulations, and literatures. Through the foundation of such theoretical consideration, the components of the audit quality were deducted and each component's impact on the audit performance was empirically proven. The collected data through the survey were analyzed using multi-regression analysis. The measurement tools used for this study were divided into three dimensions such as internal quality, interaction quality and environmental quality. Result: First remark, out of the various components of the audit quality, independence, professionalism, and empathy appear to positively impact the audit degree of satisfaction. However, the measure of sufficiency is shown to bear no correlation to the audit degree of satisfaction. Second, out of the various components of the audit quality, professionalism, sufficiency, and empathy appear to positively impact the audit degree of applicability. However, the measure of independence is shown to bear no correlation to the audit degree of applicability. Third, audit quality appears to positively impact the audit degree of satisfaction and applicability, and also the performance of management. Concusion: It appears that the audit quality positively impacts the audit degree of satisfaction, applicability and management performance indicated by the audit performance.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.7
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• pp.175-183
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• 2017

In this study, the LINC project is finished and a new LINC+ has begun. For the settlement of mutual cooperation in universities and corporations, the main agenda of LINC+ project, this research attempts to find factors that are important to industries rather than the measurement of performance closely related to universities. From the companies' perspective, it is not easy to measure how much they are benefiting from mutual cooperation, although there are quantitative performance determinants such as sales, employment and export growth. Therefore, while estimating the satisfaction of industrial-educational cooperation and simultaneously estimating the satisfaction's effect to the development of companies, we try to estimate the contribution of satisfaction towards company development through subjective indicators. Through these efforts, we will raise the credibility of government policies through the cultivation of talented individuals who are customized to the industry through the cultivation of "Industry-Leading Universities" that we intend to pursue through the implementation of LINC+ business, and small and medium enterprises. Innovative support and the cooperation of industry-universities will increase job creation and ensure consistent industry. We will contribute to the mutual development of universities and industries.

• Journal of the Korea Convergence Society
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• v.4 no.4
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• pp.41-48
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• 2013

Observer design for system with unknown input was carried out. First, Kalman filter was considered to estimate system state with White noise. With the results of Kalman filter design, state observer, controller properties, including controllability and observability, and the Kalman filter structure and algorithm were also studied. Kalman filter algorithm was applied to Position and velocity measurement based on Kalman filter with white noise, and it was constructed and achieved by programming based on Matlab programming. Finally, observer for system with unknown input was constructed with the help of Gershgorin's disc theorem. With the designed observer, system states was constructed and applied to system with unknown input. By simulation results, estimation performance was verified. In this project, state feedback control theory, observer theory and relevant design procedure, as well as Kalman filter design were understood and used in practical application.

• Journal of Information Processing Systems
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• v.5 no.4
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• pp.197-206
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• 2009

We introduce a novel high-level security metrics objective taxonomization model for software- intensive systems. The model systematizes and organizes security metrics development activities. It focuses on the security level and security performance of technical systems while taking into account the alignment of metrics objectives with different business and other management goals. The model emphasizes the roles of security-enforcing mechanisms, the overall security quality of the system under investigation, and secure system lifecycle, project and business management. Security correctness, effectiveness and efficiency are seen as the fundamental measurement objectives, determining the directions for more detailed security metrics development. Integration of the proposed model with riskdriven security metrics development approaches is also discussed.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.27 no.1
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• pp.138-143
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• 2003

Ultrasonic flowmeters have more advantages than the conventional method using pressure-difference. In these reasons, many advanced nations are already selling the commercial model. In RIST, we have been developed ultrasonic gas flow meter for the localization since a project was been contracted with POSCO in 1997. This paper describes a new ultrasonic gas flowmeter. This ultrasonic gas flowmeter is developed for accurate measurement of gases in a harsh environmental conditions. It is especially suited for measuring LDG. COG, BFG gases produced in iron & steel making process. In this study, we had developed the commercial model about the first tested model and applied a completed system to the POSCO gas line. Its performance has been proven by extensive field tests for several months in POSCO, iron & steel making company.

• Proceedings of the KAIS Fall Conference
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• 2007.05a
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• pp.311-314
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• 2007

비영리기관이 직면한 도전은 영리기업이 직면한 도전과 상당히 일치한다. 영리기업들은 경쟁증가, 비용증가 다양한 도전사항에 직면하고 있으며, 이러한 도전사항으로 부터 올바른 길로 이끌어 줄 도구로 BSC를 채택하고 있다. 비영리기관은 동일한 도전에 직면했을 때 BSC로부터 얻는 이점이 영리기관과 동일하거나 더 크지 않는 한 이를 채택하려고 하지 않을 것이다. 우리는 이 논문에서 BSC가 크고 작은 연구기관 공공기관과 비영리기관 모두에 성공적으로 적용 가능하고 생각하였고, 그래서 먼저 'BSC가 왜 중요한가?'에 대하여 알아보고, '비영리기관의 BSC는 영리기관의 BSC 접근법과 유사하지 않은가?' 생각해보고 연구기관의 프로젝트 전개에 적합한 BSC를 전개하고자 한다.