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유상우(Sangwoo Yu),김용수(Yong Soo Kim) 한국신뢰성학회 2021 신뢰성응용연구 Vol.21 No.3
Purpose: Quantitative diagnosis of current levels is needed to establish future management and development strategies in the company. Many manufacturers use a methodology for measuring technical maturity, such as technology readiness level (TRL); however, there are no techniques available to measure reliability levels. Methods: In this study, reliability activities were segmented according to the entire cycle of technology development. The reliability steps were then presented separately by level. Results: The reliability readiness level (RRL) was proposed in conjunction with each level of TRL, and the necessary activities were presented for each step. Conclusion: The company is expected to perform the required reliability activities by adhering to the RRL guide and actively utilize RRL for carrying out risk management for R&D projects.
유상우(Sangwoo Yu),박정원(Jungwon Park),김민(Min Kim),홍정표(Jungpyo Hong),오근태(Geuntae Oh),나윤균(Yoonkyoon Na) 한국신뢰성학회 2016 신뢰성응용연구 Vol.16 No.3
Purpose: The purpose of this study is to measure the reliability of complex equipment. Reliability of product is one of the most important factor to achieve competitiveness in the market. While there were many researches for assessing the reliability on components and modules, research on quantitative assessment tool for equipment with many component was little because of equipment’s complexity. Methods: In this article, we developed index to assess reliability management system by using IEC 60300 and Reliability Management Tool-kit. With MIR and BARS, we developed reliability index clauses relevant to reliability activities and found weight factor for each clause by survey on experts. Results: The results of this study were as follows; reliability index that can assess both management side and technology side of the company was developed. Conclusion: Using this index, we assessed the reliability of a manufacturing equipment and found out the current reliability level of the manufacturing equipment, and derived improvement points.
이원주 ( Wonjoo Lee ),유상우 ( Sangwoo Yu ),박수홍 ( Soohong Park ),김경훈 ( Kyunghoon Kim ),하다솜 ( Dasom Ha ),설은숙 ( Eunsuk Seoll ),한수진 ( Soojin Han ),박서하 ( Seoha Park ),이지수 ( Jisu Lee ),김찬휘 ( Chanhwi Kim ),강진구 ( 한국품질경영학회 2020 품질경영학회지 Vol.48 No.3
Purpose: This study was performed for advancement of aviation security equipments certification system. Methods: We investigated aviation security equipments certification-related registrations and the latest research trends of explosive detection technologies. Based on the literature studies, we draw the critical issues of the aviation security equipment certification system and suggested improvement direction. Results: We found some inaccuracies of the definition of explosive trace detection equipments, accreditation review committee, and performance evaluation test method. These problems should be modified to suit being practical. Conclusion: The present results would be useful for basic data for modifying aviation security equipments certification systems.
MIL-STD-810 환경시험조건을 이용한 무기체계 핵심구성품 온도/진동복합 정상수명시험 설계 방안
강태엽(Tae Yeob Kang),서동환(Donghwan Seo),민준기(Joonki Min),이강영(Kangyoung Lee),김성규(Sungkyu Kim),홍정표(Jeongpyo Hong),양일영(Ilyoung Yang),유상우(Sangwoo Yu) 한국신뢰성학회 2021 신뢰성응용연구 Vol.21 No.1
Purpose: Previous work regarding reliability testing has focused on accelerated life testing, leading to a lack of information on non-accelerated life testing; however, it is a proper choice when testing time is not a constraint. Methods: Therefore, the design process of the non-accelerated testing is proposed, including selecting the essential component to test, defining target life expectancy and main stress factors, designing testing profiles, and determining the number of test items and testing periods. Especially, this paper provides the guideline with which the stress levels and the test profile can be designed based on the MIL-STD-810 standard. Results: We show that the vibration testing profile can be designed by applying the Miner-Palmgren rule to the given MIL-STD-810 profile. The temperature range of interest was directly derived from the standard. Conclusion: This paper presents the design guideline of the non-accelerated life testing case where the test item is an essential component of defense systems and the main stress factors are temperature and vibration.