• Title/Summary/Keyword: System performance

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A Case on the Evaluation of the Information System Project to Enhance the Performance of DIMS(Defense Material Information System) (국방물자정보시스템 성능개선 사업평가에 대한 사례)

  • Cho, Sung-Rim;Lim, Gyoo-Gun;Lee, Dae-Chul
    • Journal of Information Technology Services
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    • v.11 no.1
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    • pp.109-123
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    • 2012
  • There are many evaluation models to measure the informatization level of an organization and information system project in the ministry of National Defense of Korea. A information system has to keep up with the environment change as well as the advanced recent information technology (IT). Therefore, the evaluation of an information system project to enhance the performance of the information system should be different from the existing evaluation methods. This study suggests an evaluation case of information system projects to enhance the performance of an information system. In order to achieve the objective of this study, the following steps are taken. First, it reviews the background and the scope of the project to enhance the performance of the Defense Material Information System (DMIS). And it sets up the evaluation logic and develops performance indexes. Then it applies these newly developed performance indexes to the information system project and measures the performance. From this study, we found that both the diffusion and the experience accumulation by its continuous use are significant factors in such evaluations.

Sensitive analysis of design factor for the optimum design of PVT system

  • Jeong, Yong-Dae;Nam, Yujin
    • KIEAE Journal
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    • v.15 no.4
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    • pp.5-11
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    • 2015
  • Purpose: Recently, renewable energy system has been widely used to reduce the energy consumption and CO2 emission of building. A photovoltaic/thermal(PVT) system is a kind of efficient energy uses, which is combined with photovoltaic module and solar thermal collector. PVT system removes heat from PV module by through thermal fluid to raise the performance efficiency of the PV system. However, though PVT system has the merit of the improved efficiency in theoretical approach, there have been few performance analysis for PVT system using the dynamic energy simulation. In this study, in order to establish the optimum design method of this system, simulation was conducted by using individual system modules. Method: For the dynamic simulation, TRNSYS17 was used and local weather data was utilized. Furthermore, the system performance in various installation condition was calculated by case studies. Result: As a result, the amount of electric generation and heat production in each case was found by the simulation. The gap of system performance was also evident according to the installation condition.

The Influence of the Quality Management System on the Firm's Performance : Moderating Effect of Organizational Characteristics and Customer Satisfaction (품질경영시스템이 기업성과에 미치는 영향 : 조직특성과 고객만족의 조절효과)

  • Shim, Nam Yong;Lee, Sang Cheol
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.38 no.4
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    • pp.88-97
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    • 2015
  • Quality management system is a systematic quality improvement approach for firm-wide management for the purpose of improving performance in terms of quality, productivity, organizational characteristics, customer satisfaction, and firm's profitability. Recently, many researchers have examined the relationship between quality management system and firm's performance. The conclusion from these studies is that effective implementation of quality management system improves firm's performance. This paper extends the existing research on quality management system and firm's performance by examining how the impact of quality management system on firm's performance is moderated by organizational characteristics and customer satisfaction. The paper is organized as follows. Section 1 introduces the necessity and purpose of the research. Section 2 reviews quality management system and summarizes the results of previous studies. Section 3 present the proposed research model, the hypotheses related to the relationship between quality management system and firm's performance. Section 4 provides results from the data analysis. Section 5 presents discussions, results, further implications, and research limitations. An extensive literature research was designed to identify and retrieve empirical studies relevent to develop the hypotheses. The objectives of this study identify the factors of quality management system on business performance. The results are as follows: First, The management responsibility, resource management and product realization influenced significantly on financial performance. The management responsibility and product realization influenced significantly on non-financial performance. Second, the research showed a fact that organizational characteristics and customer satisfaction effect as a moderated between quality management system and business performance. The implications of our results are that organizational characteristics and customer satisfaction moderate the firm's performance.

On the Performance Management System to Analyse the Effectiveness of Type Approval System for Railway Vehicle

  • Lee, Young Hoon;Lee, Jee Ha;Park, Chan Kyung;Kim, Young Min
    • International Journal of Internet, Broadcasting and Communication
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    • v.13 no.1
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    • pp.1-10
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    • 2021
  • The type approval system for railway vehicle has been in effect since 2016 in order to establish a regular safety management system to secure railway safety and enhance the technological competitiveness of the railway industry, abolished the conventional performance test system through the reform of the Railroad Safety Act in 2012. Until now, there has been appreciated it has been making significant contributions to railway safety and industry of operation and manufacturing companies, taking their place in accordance with the implementation of the system. But there has been no case of quantitative analysis on the effectiveness of the actual system. In this study, in order to examine the full-scale performance of the approval system and quantitatively analyze effectiveness, we identified and defined the relationships with the major elements of the type approval system based on system thinking principle and determined the calculated outcomes to relevant stakeholders. A method of establishing a type approval performance management system that can be grasped, utilized, and adjusted from a point of various stakeholders' views was proposed. This is expected to be more helpful in the implementation of the system, such as improving and applying quantitative effects to analysis by closely reviewing the effects and influencing factors of the type approval system based on the data accumulated through continuous performance management and reflecting to system improvement.

Investigation of Validation Guidelines for Performance Verification of High Performance Liquid Chromatograph (고성능 액체크로마토그래프 기기의 성능검증을 위한 밸리데이션 가이드라인에 대한 연구)

  • Yun, Won Nam;Lee, Beom-Gyu;Lee, Wonjae
    • YAKHAK HOEJI
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    • v.57 no.5
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    • pp.362-368
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    • 2013
  • High performance liquid chromatograph (HPLC) is the most frequently used analytical instrument in analytical laboratories for pharmaceutical analysis. In order to provide a high level of assurance for reliable data generated from the HPLC analysis, the performance qualification of the HPLC system is required. For this purpose, the performance of HPLC system should be regularly monitored by examining the key functions of the typical HPLC system (solvent delivery system, injector system, column oven, UV-VIS detector system). We have investigated the validation guidelines of the performance verification of these key modules for HPLC system. And we proposed and evaluated its validation guidelines and the related verification methods for pharmaceutical analysis that could be practically applied in Korea.

An Empirical Study on Critical Success Factors in Implementing ERP System (ERP시스템 구축단계 별 주요성공요인에 관한 실증적 연구)

  • 김상훈;최광돈
    • Journal of the Korean Operations Research and Management Science Society
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    • v.26 no.4
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    • pp.1-21
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    • 2001
  • The purpose of this stuffy is to derive critical success factors for ERP system implementation by integrating managerial, technical. human resource and organizational culture factors welch have been proposed as influencing factors for the performance of ERP system implementation in previous studios. Especially, this stuffy divides ERP system implementation process into preparation stave, implement stage and settle-down and stabilization stave, and then derives critical success factors in each stage. The data for empirical analysis of the research model are collected from 64 companies and the respondents for questionnaire consist of ERP system implementation project managers and user department managers in companies which have already operated it after ERP system installation. The main results of this study are as follows. First, it derives 27 success factors through comprehensive review of various factors which may affect ERP system implementation performance, and categorizes them into one of three stapes preparation stave, implement stage, and settle-down and stabilization stage. Second, the relationship between many success factors at each stave (preparation stave, implement stage, and settle-down and stabilization stave) and performance variables is tested. As a result, the significant correlations between many success factors at each stage and ERP system implementation performance are found, and the difference among success factors in the degree of influencing the system performance is significantly shown. finally, the relationship between process-oriented performance variables and result-oriented performance ones is tested. As a result, it is found that there is significant correlation between process-oriented performance variables except for one variable-project resource management appropriateness - and result-oriented performance ones. The theoretical contribution of this study is to derive a comprehensive model of critical success factors for implementing ERP system project from the system deve1opment life cycle perspective, and empirically test it through field survey with a wide range of data collection. And, the practical implication of this study is to present the desirable guidelines for performing ERP system implementation project successfully.

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The Operation and Vibration Characteristics of Tail-Fan Performance Test System (테일팬 성능시험장치의 운용과 진동특성)

  • Song, Ken-Woong;Kim, Jun-Ho;Kang, Hee-Jung;Rhee, Wook;Sim, Jung-Wook
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.11a
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    • pp.508-512
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    • 2004
  • This paper described operation and vibration characteristics of 'Tail-Fan' performance test system. KARI(Korea Aerospace Research Institute) developed 'Tail-Fan' system as a kind of helicopter anti-torque system(ATS) and designed ATS performance test-rig for Tail-Fan system performance test. Test-rig consists of driving parts, supporting parts and rotating parts. For Tail-Fan system performance tests, firstly, test-rig operation tests were carried out for verification of design specifications. Secondly, natural frequencies of fan blade and test-rig were measured respectively. Lastly, to find the operation rotating speed for performance tests, vibration tests using accelerometers on tail gear box(TGB) were carried out. Through the fanplot and vibration test results, Tail-Fan performance test conditions to avoid a resonance were found and performance tests were well done safely.

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Intrusion Detection System for Denial of Service Attack using Performance Signature (성능 시그네쳐를 이용한 서비스 거부 공격 침입탐지 시스템 설계)

  • Kim, Gwang-Deuk;Lee, Sang-Ho
    • The Transactions of the Korea Information Processing Society
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    • v.6 no.11
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    • pp.3011-3019
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    • 1999
  • Denial of service is about knocking off services, without permission for example through crashing the whole system. This kind of attacks are easy to launch and it is hard to protect a system against them. The basic problem is that Unix assumes that users on the system or on other systems will be well behaved. This paper analyses system-based inside denial of services attack(DoS) and system metric for performance of each machine provided. And formalize the conclusions results in ways that clearly expose the performance impact of those observations. So, we present new approach. It is detecting DoS attack using performance signature for system and program behavior. We present new approach. It is detecting DoS attack using performance signature for system and program behavior. We believe that metric will be to guide to automated development of a program to detect the attack. As a results, we propose the AIDPS(Architecture for Intrusion Detection using Performance Signature) model to detect DoS attack using performance signature.

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Analysis on the Qualitative Performance of a Power Split/Circulation Transmission (동력분기/순환구조 동력전달계의 정성적 성능 해석)

  • Lim, W.S.;Lee, D.J.;Lee, J.M.;Park, Y.I.
    • Transactions of the Korean Society of Automotive Engineers
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    • v.3 no.6
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    • pp.212-223
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    • 1995
  • To improve the efficiency of a power transmission system with slip elements, power split/circulation system is applied. The performance of a power split/circulation system varies widely by the change of the followings; the layout of system, the type and gear ratio of planetary gear, the performance of slip element, etc. Therefore, when one designs such a power transmission system or when one determines the economic/power mode of system, a certain performance prediction method is needed. In this study, the internal power flow pattern of a power split/circulation system is theoretically analyzed on several transmission systems. And an effective performance prediction method(so called performance locus diagram) is presented. By this method, the effects of design factors can be easily understood and the qualitative performances of system can be clearly evaluated.

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Development of a Robot Performance Evaluation System Using Leica LTD 500 Laser Tracker (레이저 트랙커(Leica LTD 500)를 이용한 로봇 성능 평가 시스템 개발)

  • Kim Mi-Kyung;Yoon Cheon-Seok;Kang Hee-Jun;Seo Yeong-Su;Ro Young-Shick;Son Hong-Rae
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.06a
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    • pp.1001-1006
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    • 2005
  • A Robot Performance Evaluation System(RPES) with the laser tracker Leica LTD 500 was developed according to the ISO 9283 robot performance criteria. The developed system is set up a test robot to continuously move the prescribed cyclic trajectories without a human intervention and the laser tracker to simultaneously measure the robot's movement. And then, the system automatically extracts the required data from the tremendous measured data, and computes the various performance criteria which represents the present state of the test robot's performance. This paper explains how ISO 9283 robot performance criteria was used for the developed system, and suggests a automatic data extraction algorithm from the mass of measured data. And also, a user-friendly Robot Performance Evaluation System(RPES) Software was developed with Visual Basic satisfying the need of Hyundai Motor Company. The developed system was implemented on NACHI 8608 AM 11 robot. The resulted output shows the effectiveness of the developed system.

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