• Title/Summary/Keyword: Safety Issue

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- A Study on the Model for Choosing Critical Factors of Competitiveness and Resources Allocation - (경쟁력 결정요인 선정 및 자원 배분에 관한 연구)

  • Kim Jong Gurl;Bin Sung Uk
    • Journal of the Korea Safety Management & Science
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    • v.6 no.4
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    • pp.123-137
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    • 2004
  • It is an important and hot issue how to improve the competitiveness concerned on product, company and industry. It is necessary to develop the strategy of competitiveness for an efficient operation as well as improving the competitiveness in view of product, system, industry, price, quality and so on. This paper aims at proposing a model to choose dominating factors of competitiveness including a method o( resources allocation which can be applied to all products. And we show its empirical application on tile-industry.

Reliability Sampling Plans for Lot Assurance (신뢰성 로트보증 샘플링 검사방식)

  • 김종걸;전봉룡
    • Proceedings of the Safety Management and Science Conference
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    • 2004.05a
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    • pp.145-151
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    • 2004
  • Reliability assurance problem is an important issue in advanced company with good R&D capacity. In Korea, long-term and large-scale project for reliability improvement and certification have been conducted from 2000, 4 years ago. Generally, assurance is composed of system assurance and lot assurance. For reliability lot assurance. it is prerequisite to development reliability sampling plan with time-saving and minimum cost. In this paper, we aim to investigate previous study on reliability lot assurance focused on reliability sampling plans and propose some suggestions for the future study.

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The Parameter Design of Multiple Characteristics with Correlation (특성치간의 상관관계를 고려한 다특성치 파라미터 설계)

  • 조용욱;박명규
    • Journal of the Korea Safety Management & Science
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    • v.2 no.1
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    • pp.161-170
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    • 2000
  • When designing the parameter on the multiple quality characteristics, there has been a study for optimization of problems, but there has been few former study on the possible conflicting phenomena in consideration of the correlations among the characteristics. To solve the issue on the optimal design for multiple quality characteristics, this study modelled the expected loss function with cross-product terms among the characteristics and derived range of the coefficients of the terms. The model will be used to determine the global optimal design parameters where there exists the conflict among the characteristics, which shows difference in optimal design parameters for the individual characteristics.

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A Study Process of SCM and Relation development other systems (SCM(Supply Chain Management)의 프로세스연구와 타 시스템과의 연계성 연구)

  • 박주식;이태우;연찬호;강경식
    • Journal of the Korea Safety Management & Science
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    • v.3 no.1
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    • pp.81-91
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    • 2001
  • In supply chain management, coordination between a manufacture and suppliers Is regarded as the most important issue when partnership of organizations of considered. This paper Introduces the current status of SCM in terms of physical systems, relation with other solution systems as well as the general history and definitions of SCM. Researches are categorized into deterministic, stochastic, and several future research areas are discussed in the paper.

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Research on Six Sigma Application for Efficiency of Logistics (물류관리 효율화를 위한6시그마 적용에 관한 연구)

  • Yoon, Seong-Pil;Cho, Tae-Yeon;Yoo, Jin-Sung;Kim, Chang-Soo
    • Journal of the Korea Safety Management & Science
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    • v.8 no.4
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    • pp.129-149
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    • 2006
  • Six sigma, contrary to TQM, offers the concrete process for accomplishing the management innovation. Nowadays it has become as a standard means. Many companies claim to stand for durable management and would like to get customers' satisfaction and more profit with total six sigma activities. Under the present conditions we propose how to maximize efficiency with six sigma application on transportation management that is an issue among many companies.

Selecting the Optimal Facilities using Multiple Characteristics Loss Function (다특성치 손실함수를 이용한 최적설비 결정)

  • 허준영;서장훈;조용욱;박명규
    • Proceedings of the Safety Management and Science Conference
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    • 2003.05a
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    • pp.1-5
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    • 2003
  • We purpose a decision model to select the optimal facilities for the Decision Making problems with multiple characteristics(nominal-is-best characteristics, larger-is -better characteristics, smaller- is -better characteristics). Using this model, concept of the loss function is used in this comprehensive method of for select the optimal preferred facilities. To solve the issue on the optimal preferred facilities for multiple characteristics, this study propose the loss function with cross-product terms among the characteristics and derived range of the coefficients of the terms.

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Quantitative Reliability Assessment for Safety Critical System Software

  • Chung, Dae-Won
    • Journal of Electrical Engineering and Technology
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    • v.2 no.3
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    • pp.386-390
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    • 2007
  • At recent times, an essential issue in the replacement of the old analogue I&C to computer-based digital systems in nuclear power plants becomes the quantitative software reliability assessment. Software reliability models have been successfully applied to many industrial applications, but have the unfortunate drawback of requiring data from which one can formulate a model. Software that is developed for safety critical applications is frequently unable to produce such data for at least two reasons. First, the software is frequently one-of-a-kind, and second, it rarely fails. Safety critical software is normally expected to pass every unit test producing precious little failure data. The basic premise of the rare events approach is that well-tested software does not fail under normal routine and input signals, which means that failures must be triggered by unusual input data and computer states. The failure data found under the reasonable testing cases and testing time for these conditions should be considered for the quantitative reliability assessment. We presented the quantitative reliability assessment methodology of safety critical software for rare failure cases in this paper.

Railway Software Analysis Tool using Symbolic Execution Method (심볼릭 수행 방법을 이용한 철도 소프트웨어 코드분석 도구제안)

  • Jo, Hyun-Jeong;Hwang, Jong-Gyu;Shin, Duck-Ho
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.65 no.4
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    • pp.242-249
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    • 2016
  • The railway system is being converted to the computer system from the existing mechanical device, and the dependency on software is being increased rapidly. Though the size and degree of complexity of software for railway system are slower than the development speed of hardware, it is expected that the size will be grown bigger gradually and the degree of complexity will be increased also. Accordingly, the validation of reliability and safety of embedded software for railway system was started to become influential as the important issue. Accordingly, various software test and validation activities are highly recommended in the international standards related railway software. In this paper, we presented a software coding analysis tool using symbolic execution for railway system, and presented its result of implementation.

A Study on the Software Safety Assessment of Healthcare Systems

  • Olenski, Rafal;Park, Man-Gon
    • Journal of Multimedia Information System
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    • v.2 no.2
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    • pp.241-248
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    • 2015
  • The safety-critical software in healthcare systems needs more and more perceptive excess among human observation and computer support. It is a challenging conversion that we are fronting in confirming security in healthcare systems. Held in the center are the patients-the most important receivers of care. Patient injuries and fatalities connected to health information technologies commonly show up in the news, contrasted with tales of how health experts are being provided financial motivation to approve the products that may be generating damage. Those events are unbelievable and terrifying, however they emphasize on a crucial issue and understanding that we have to be more careful for the safety and protection of our patients.

A Study on the Arson Fire Char-acteristics based on Computer Simulation (컴퓨터 시뮬레이션에 의한 방화화재 특성에 관한 연구)

  • Choi, Jin
    • Proceedings of the Safety Management and Science Conference
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    • 2007.11a
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    • pp.239-253
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    • 2007
  • With the development of the Korean economy, the number of arson fire has been radically increased and become a huge problem and issue in Korea Society for last several decades. This study is to establish the fire life safety strategy regarding the arson fire through performing the computer simulation based on fire scenarios with researching domestic fire statistics and cutting edge techniques and methods for fire characteristics and fire dynamic. In addition, to design the fire life safety strategy depending on the arson fire pattern, the flow and characteristics of fire flames and smoke is analyzed by the computer modeling.

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