• 산업경영시스템학회지
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• 제29권3호
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• pp.135-142
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• 2006

Engineers are always concerned with life cycle costs for making important economic decisions through engineering action like reliability of products. Decisions during the reliability growth development of products involve trade-offs between invested costs and its returns. In order to find minimal LCC containing the reliability improvement cost, production cost, repair and replacement costs, and holding cost of spare parts for failure items we suggest in this paper relationship between development cost and sustaining cost in values of growth parameter $\beta$ of AMSAA model. This model is applied to the reliability growth program based on AMSAA model during R&D phase, the warranty activities of items and the block replacement policy for maintenance of items in avionic equipment.

• 품질경영학회지
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• 제22권4호
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• pp.132-151
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• 1994

Quality is a critical competitive factor in today's environment because of the impact of quality on market share, productivity and costs. Especially in Korean companies, the importance of quality is heightened as they are losing price competitiveness compared to the new industrialized countries. The traditional approach to quality improvement has been focused on workers. The primary means to achieving acceptable outgoing quality has been to inspect quality by adding more inspectors and inspection stations. This is an example of quality cost that can be reduced through the preventive actions against bad quality. Quality cost is best viewed as a measure of costs specifically associated with the achievement or nonachievement of product/service quality required by customers. This paper examines the concept of quality cost, provides guidance to implementing a quality cost system, and identifies the limitations of quality cost information. These limitations are the target for future research for an efficient and effective implementation of quality cost system.

• 한국IT서비스학회지
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• 제6권3호
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• pp.87-110
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• 2007

Recently, researches on IT Service Management (ITSM) for improving information system operation service and information system outsourcing cost estimation model are proliferating. This study suggests a new cost model of IT operation service and optimizing method based upon the characteristics of operation service as a long-term and continuous business service for both user's and service provider's point of view. This study explains the cost optimization model of IT operation service by improving service request management process, such as adequate reception and control, proper valuation, process management using project management methodology, effective organization and time management of service personnel. Especially in this study, service ability improvement effect and fixed operation cost reduction effect are defined to prove the proposed new cost model.

• Communications for Statistical Applications and Methods
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• 제7권3호
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• pp.773-788
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• 2000

Statistical process control (SPC) and engineering process control (EPC) are based on different strategies for processes quality improvement. SPC reduces process variability by detecting and eliminating special causes of process variation. while EPC reduces process variability by adjusting compensatory variables to keep the quality variable close to target. Recently there has been needs for a process control proceduce which combines the tow strategies. This paper considers a combined scheme which simultaneously applies SPC and EPC techniques to reduce the variation of a process. The process model under consideration is an integrated moving average(IMA) process with a step shift. The EPC part of the scheme adjusts the process back to target at every fixed monitoring intervals, which is referred to a repeated adjustment scheme. The SPC part of the scheme uses an exponentially weighted moving average(EWMA) of observed deviation from target to detect special causes. A Markov chain model is developed to relate the scheme's expected cost per unit time to the design parameters of he combined control scheme. The expected cost per unit time is composed of off-target cost, adjustment cost, monitoring cost, and false alarm cost.

• 대한안전경영과학회지
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• 제7권2호
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• pp.95-106
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• 2005

Many Korean companies are challenged to reduce logistics cost and meet environmental-friendly logistics. The textile companies in harsh competition are requested to make improvement on their logistics environment to cut down the total cost. However, they have reached the limit on improving the manufacturing process. We believe that the logistics department is the most improvable part at present. Improving logistics will be highly effective to cut down the total cost. In this study, we present Pad Pool System(PPS) as the solution to save their logistics cost. PPS, which means the shared use of Styrofoam pads, will enable the textile companies to cut down their cost and strengthen enterprise competitiveness. Also, PPS will be helpful reducing environmental disruption because the system reuses retrieved Styrofoam pads many times.

• 한국건설관리학회논문집
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• 제1권4호
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• pp.82-90
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• 2000

낙후된 국내 건설관리기술을 선진화$\cdot$합리화하기 위한 방안 중의 하나로 공정-공사비 통합관리가 많은 주목을 받고 있다. 정부에서도 공정과 공사비의 통합관리의 필요성을 인식하고 이의 도입을 적극검토하고 있다 실제로 해외공사를 통해서 양성된 국내 공정관리 전문가들의 노력으로 최근 일부 공공기관의 건설사업에서는 공정-공사비 통합관리를 부분적으로 활용하고 있는 상황이다. 그러나 그 기법 및 전산모델이 이론에 국한된 것이거나 국내의 특수한 여건을 수용하지 못하는 것이 대부분이기 때문에 활용에 많은 어려움이 있으며 국내 건설환경에 완전하게 정착되지 못하고 있다. 본 연구의 목적은 통합관리의 정착을 지연시키는 국내의 특수한 여건 및 문제점을 파악하고 이를 토대로 국내 건설현장에서 적용할 수 있도록 공정-공사비 통합모델의 개선방안을 제시하는 것이다.

• 한국병원경영학회지
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• 제5권1호
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• pp.200-231
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• 2000

The price systems of the hospital drug services play key roles in the provision of quality services and the development of pharmacy service technologies. Under the premises, this study attempted to determine the costs of hospital drug service, to compare the costs calculated with the fees publicly fixed by the Government, and based on the results of the analysis, to propose directions for the improvement of the price systems. A Costing model for the study was developed based on the cost-fee relationship analysed of the Korean fee-for-service systems. Data on costs and workloads of the 25 hospitals were collected through survey forms designed for the costing' and analysis for the duration of 12 months of 1998. The results of the analysis show that a tremendous unbalance between cost and price levels of the drug services, and that overally the price level of the services is extremely low when compared to the costs of services. Based on these findings, this study suggests that unfairly high or low price level be corrected, and that service items newly developed and being practiced at tertiary hospitals, such as TDM and TPN consultation services, be compensated by fixing a proper level of price.

• 공학기술논문지
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• 제11권4호
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• pp.287-294
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• 2018

Since its introduction in Korea, design VE has widely been used as a means to enhance values in the construction industry. However, a greater emphasis is still placed on cost reduction in approach attitudes and performance evaluations on the implementation of design VE. In this regard, this study presented a performance evaluation method for cost, function, and value of VE proposals. Numerical criteria on the increase and decrease of cost and function that can classify the value enhancement type of VE proposals were proposed based on the performance evaluation method. It is expected that the use of numerical criteria for the type classification of VE proposal, and cost and performance evaluation method proposed in this study will make it possible to conduct a clear and more intuitive evaluation of VE proposal. However, it is appropriate to use the numerical criteria as a guideline to apply the new performance evaluation method for VE proposals. Therefore, it is necessary to conduct a statistical analysis with a wider range of users after the repeated application of the findings of this study, and thus to carry out research for presenting the numerical criteria for various types of users.

• 한국건설관리학회논문집
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• 제21권2호
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• pp.39-46
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• 2020

산업안전보건관리비는 산업 현장에서 발생하는 인적 안전사고를 사전에 방지하기 위한 목적으로 1988년에 시행되었다. 그러나 다섯 개의 공사종류와 세 개의 공사금액을 기준으로 한 산업안전보건관리비의 계상기준은 다양한 건축현장의 특성을 반영하지 못하고 있다. 이를 연구하기 위해, 본 연구는 국내건설업체 현장의 건설업 산업안전보건관리비의 사용률과 사용세부항목을 분석하였다. 그 결과, 상당수의 현장에서 산업안전보건관리비를 초과 사용한 사실과 그 원인을 밝혀낼 수 있었다. 이를 토대로 본 연구에서는 건설업 산업안전보건관리비의 계상기준 개선의 필요성과 방향성을 제시하고자 하였다.

• 한국신뢰성학회지:신뢰성응용연구
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• 제14권4호
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• pp.256-261
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• 2014

Solar cells are considered ideal as a clean energy to generate electricity. However, silicon-based photoelectric cells show some shortcomings in efficiency, cost and reliability. This has been a barrier to further commercialization. This paper shows how 40 Inventive Principles can be used in the research and development on the solar cells to improve efficiency, cost and reliability.