• Title, Summary, Keyword: System Safety

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A Study on the Safety Requirements Establishment through System Safety Processes (시스템 안전성평가를 통한 효율적 요건 도출방안 연구)

  • Yoo, Seung-woo;Jung, Jinpyong;Yi, Baeck-Jun
    • Journal of Aerospace System Engineering
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    • v.7 no.2
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    • pp.29-34
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    • 2013
  • Safety requirements for aircraft and system functions include minimum performance constraints for both availability and integrity of the function. These safety requirements should be determined by conducting a safety assessment. The depths and contents of aircraft system safety assessment vary depending on factors such as the complexity of the system, how critical the system is to flight safety, what volume of experience is available on the type of system and the novelty and complexity of the technologies being used. Requirements that are defined to prevent failure conditions or to provide safety related functions should be uniquely identified and traceable through the levels of development. This will ensure visibility of the safety requirements at the software and electronic hardware design level. This paper has prepared to study on promoting the efficiency of establishing hierarchical safety requirements from aircraft level function to item level through system safety processes.

Safety analysis to derive safety requirement in the railway system

  • Joung, Eui-Jin;Shin, Kyung-Ho;Kim, Yong-Gyu
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • v.1
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    • pp.383-386
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    • 2006
  • The safety of the railway system is important because the system is a mass transit system and the results of the accident are inconceivable. The railway system is operated by train operation system such as train control system. So the train control system requires safety critical characteristics. In the European railway, ETCS (European Train Control System) project has been finished to accomplish the interoperability of each national railway signaling system. According to the interoperability degree, ETCS levels are suggested. As the highest level, ETCS level 3 suggests a radio communication. Also recently urban railway system is operated by driverless and automatic train control system. In this circumstance, more safety is required than before in the railway system. In order to accomplish the safety of a system, the requirements considering safety have to be suggested. The requirement is a set of several functions such as general function, environment, safety etc. For the safety critical system, safety function is more important than any other functions. The safety functions are deduced by safety analysis. In order to perform the safety analysis, the system hazards have to be identified and then risk analysis for each hazard should be performed. The risk is related to the frequency and the severity of each hazard. And then countermeasures for each risk have to be prepared. The summary of the countermeasures is about a kind of safety functions in a system. In this paper, the safety functions for a train control system are presented according to the above procedure.

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The Impact of the Safety Awareness & Performance by the Intelligent Image Analysis System (지능형 영상분석 시스템이 작업자 안전의식 및 행동에 미치는 영향)

  • Jang, Hyun Song
    • Journal of the Korea Safety Management and Science
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    • v.17 no.3
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    • pp.143-148
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    • 2015
  • The study examined the relationship between workers' safety awareness, safety performance and the components of the intelligent image analysis system in accordance with preventing the workers from safety hazard in dangerous working area. Based on the safety performance model, we include safety knowledge, safety motivation, safety compliance and safety participation, and we also define three additional factors of the intelligent image analysis system such as functional feature, penalty and incentive by using factor analysis. SEM(Structural Equation Modeling) analyses on the data from the total of 73 workers showed that functional feature of intelligent analysis system and incentive were positively related to safety knowledge and safety motivation. And mediation effects of the relationship were verified to safety compliance and safety participation through safety knowledge as well.

Total Safety Management System by Owner's Lending for the Effective Prevention of Construction Accidents (효과적인 안전사고 예방을 위한 발주자 선도의 총체적 안전관리제도)

  • Hong, Sung-Ho;Lee, Seung-Hyun
    • Journal of the Korean Society of Safety
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    • v.20 no.3
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    • pp.164-173
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    • 2005
  • In this paper, the systematic problems of safety management in domestic construction industry are presented by the investigation and analysis of construction fatal injuries. In particular, it is discussed that the current construction safety management system by contractors leading is ineffective to prevent the serious accidents caused by inappropriate planning and design and to circulate the safety management cycle without interruption. A couple of ways for improving domestic construction safety management system are suggested in broad perspective. This is done by the analysis of construction safety management system of four advanced industrial countries such as the United States, the United Kingdom, Germany, and Japan and the study of a best practice. Total safety management system by owners leading is recommended to prevent construction accident effectively because this system makes all the parties join to the management system and distribute the responsibilities clearly to each party. This will drop the accident occurrence rate by dragging all the parties' cooperations and activating the total safety management system in an early stage.

A Study on the Improvement of Subcontractors' Safety Management System in Construction Industries (건설업 협력회사 안전수준 향상 방안에 관한 연구)

  • Lee, Jae Yun;Oh, Tae Keun
    • Journal of the Korean Society of Safety
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    • v.32 no.2
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    • pp.78-84
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    • 2017
  • Subcontractors have an increased risk of accidents compared to large contractors. Subcontractors' safety management system is in close association with workers in construction sites. Contractors should strengthen subcontractors' roll and responsibility and provide continual support to prevent an accident. And also these supporting system should be provided to subcontractors' headquarters as well as construction site. Contractors' priority management for subcontractors safety should be transferred from the post management for disciplinary action to the preventive management to improve subcontractors participation and safety performance. Subcontractors can not establish the safety management system with just a one time supporting only. Contractors support and monitoring should be provided to subcontractors regularly and continuously to establish their self safety management system. The subcontractors safety management system improvement program(SSMSIP) suggested in this study will be a effective supporting system for subcontractors to establish and improve their safety management system. If we carry out the objective and quantitative evaluations and supporting system such as SSMSIP and provide the consequential incentive program to subcontractors, it can contribute to the accident reduction.

Integrated Safety, Quality, and Environment Information System Based on Web Environment (웹 기반 하에서의 안전, 품질, 환경 통합 정보 시스템)

  • 박재현;김형준;나승훈;서지한;김귀남
    • Proceedings of the Safety Management and Science Conference
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    • pp.27-32
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    • 2000
  • This study presents the design of integrated safety, quality, and environmental information system based on the internet environment. Quality management system, environmental management system, and safety management system are adapted in many manufacturing and service organization respectively but those system does not work effectively. Especially safety management system and environmental management system are very similar with format and contents. Therefore, Those system must be integrated to increase effiency.

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Analysis of Safety Assessment Methodology for Railway Signaling Systems

  • Hwang, Jong-Gyu;Jo, Hyun-Jeong;Yoon, Yong-Ki
    • International Journal of Safety
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    • v.6 no.2
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    • pp.38-42
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    • 2007
  • As railway signaling system is computerized, the significance on safety demonstration and assessment has been increased. Therefore, railway signaling system should reflect the needs for safety assessment technique. Various studies on safety assessment technique for railway signaling have been made in Europe and standardization of the requirements for safety acceptance has been initiated by IEC. In order to develop and establish the safety assessment techniques for railway signaling in Korea, we try to review safety assessment activities for signaling system via reviewing relevant case studies and consulting with experts. And also we propose the safety assessment activity/methodology for Korean railway signaling system.

A Study on the Actual Conditions of Safety Management in Thermal Oil System (열매체유 시스템의 안전관리 실태에 관한 연구)

  • Lee, Joo Yeob;Lee, Keun Won;Woo, In Sung
    • Journal of the Korean Society of Safety
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    • v.29 no.5
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    • pp.60-66
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    • 2014
  • Depending on the progress of the industrial advances, the use of the thermal oil system in the utility system has been increased, which became an important part in the operation of the plant. However, fire or explosion have occurred due to lack of risk awareness and safety management, more frequently than we know. In this study, by using a questionnaire, actual conditions of safety management in thermal oil system is surveyed and analyzed, it is composed of general, a safety status of the thermal oil system component and the stage of recognition and management in the thermal oil system. These results of this study can be used as basic data to the safety management and the accident prevention of fire or explosion in the workplace.

Assessment System of Safety Level of High Voltage Electrical Facilities Considering Environmental Factors (환경영향 요소를 고려한 특고압 전기설비의 안전등급 평가시스템)

  • Kim, Dong-Woo;Lim, Young-Bea;Lee, Ki-Yeon;Moon, Hyun-Wook
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.66 no.1
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    • pp.249-254
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    • 2017
  • This paper presents an assessment system of safety level of 22.9kV grade high voltage electrical facilities considering environmental factors. The assessment system was developed based on the following procedure. Firstly, assessment structure was determined by consulting standards regarding inspection and diagnosis of electrical facilities. Secondly, contents of items and sub items of assessment system were developed. Thirdly, in order to quantify the importance of the assessment system, the weight was calculated using Analytic Hierarchy Process(AHP). Lastly, assessment table of safety level was developed including environmental factors such as period of use and load factor. The developed system can evaluate the safety level of high voltage facilities in an objective way. Therefore it can be applicable to electrical safety management system based on Internet of Things(IoT).

Development of Efficient Dam Safety Management System (댐의 효율적인 관리를 위한 프로세스 개발)

  • Lim, Jeong-Yeul;Kim, Bum-Joo;Oh, Seok-Hoon;Jang, Bong-Seok;Park, Han-Gyu
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.1596-1601
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    • 2005
  • Recently, the probable maximum precipitation (PMP) of dam sites has been greatly increased, compared to that in design, due to a rise in precipitation by abnormal weather, which led to an increase in National interest for dam safety. Therefore, the purpose of this study is to develop a management system of dam safety. The main contents of the first stage($'03{\sim}'04$) of the project consisted of determining the object of management system of dam safety through researched present situation of dam safety management in domestic and reviewing operation for management system of dam safety in abroad. In the second stage($'05{\sim}'06$), the study pursues constructing a basis process of synthetic safety management system through dam safety program and developing a system that can judge dam safety with an improve in reliability of measurement data.

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