• 시스템엔지니어링학술지
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• 제3권1호
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• pp.33-40
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• 2007

The requirement verification is the integral part of the weapon system R&D to reduce cost and schedule. And, a systems engineering is an interdisciplinary engineering management process that evolves and verifies an integrated, life-cycle balanced set of system solutions that satisfy customer needs. Therefore, this study analyzes the national defense need and acquisition management process, investigates the systems engineering verification activity. Through the requirement verification example in terms of technical evaluation this study presented the requirement verification approach in the weapon system R&D.

• 한국의료질향상학회지
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• 제7권2호
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• pp.244-261
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• 2000

Background : In order to cope with changes in the management environment at hospitals, increased interests are drawn in patient foodservice system on Continuous Quality Improvement Activity as the method of approaching a quality food service and effective management. Thus, as a part of this activity, this study was conducted to evaluate job flow improvement that was already performed and the results of that process at the dietetic department of a university hospital, focusing on improving management. Method : On February 15 of 1998. the dietetic department formed a job flow-improvement to decide on the priority of job flow improvement, and prepared specific action strategies and schedule of the priority: after a 5 month process period, job improvement achieved on June 15. 1998. Also, economic achievement of the task was evaluated through labor productivity analysis and cost-benefit analysis. Results : The patient food service system which was managed decentralized at the present hospital was centralized, some steps of the food service process were integrated, and quality of patient food was improved. Also, as a solution of the problems expected when conducting job flow improvement was made on food service equipments and utensils. The result of evaluating the job flow improvement that labor productivity improved by 18.2% compared to before the improvement and the result of the analysis of cost-benefit showed that Benefit-Cost (B/C) ratio was 2.22. showing financial merit on the investment. Conclusions : Continuous Quality Improvement Activity needs to be initiated and conducted in the future in various areas of hospital foodservice system in order to actively adopt to ever changing hospital management environment. In order to achieve this goal, many researches and more efforts need to be put in by people in charge of hospital food service management, and interests and support are needed from hospital policy makers.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회/대한산업공학회 2005년도 춘계공동학술대회 발표논문
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• pp.904-913
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• 2005

This paper deals with an integrated problem of inventory control and dynamic pricing strategies for a commodity with price and sales-period dependent demand pattern, where a seller and customers have complete information of each other. The problem consists of two parts; one is each buyer's benefit problem which makes the best decision on price and time for buyer to purchase items, and the other one is a seller's profit problem which decides an optimal sales strategy concerned with inventory control and discount schedule. The seller's profit function consists of sales revenue and inventory holding cost functions. The two parts are closely related into each other with some related variables, so that any existing general solution methods can not be applied. Therefore, a simplified model with single seller and two customers in considered first, where demand for multiple units is allowed to each customer within a time limit. Therewith, the model is generalized for a n-customer-classes problem. To solve the proposed n-customer-set problem, a dynamic programming algorithm is derived. In the proposed dynamic programming algorithm, an intermediate profit function is used, which is computed in case of a fixed initial inventory level and then adjusted in searching for an optimal inventory level. This leads to an optimal sales strategy for a seller, which can derive an optimal decision on both an initial inventory level and a discount schedule, in $O(n^2)$ time. This result can be used for some extended problems with a small customer set and a short selling period, including sales strategy for department stores, Dutch auction for items with heavy holding cost, open tender of materials, quantity-limited sales, and cooperative buying in the on/off markets.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2002년도 학술대회지
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• pp.401-404
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• 2002

공사관리에 있어서 실용성의 확보는 관리의 효율화를 위한 필수요건이다. 본 연구는 공사관리의 실용성 확보전략에 따라 기존의 내역과 공정체계의 통합을 기반으로 하여, 이와 연관된 일련의 과정 즉 분류체계의 정립, 공정율의 산정, 진도 및 일정표의 작성, 원가의 집계산정, 분석 보고서의 작성 등을 대상으로 운용기준이나 절차 등을 개선하고 체계화함으로써 관리효율을 향상시킬 수 있는 실용적인 모델의 개발에 목적이 있다. 본 연구는 향후 파이롯(pilot) 프로젝트에의 적용 등 실제 검증을 거적 공사관리시스템 개발로 발전하여 공사관리의 효율화에 기여한 것으로 확신한다.

• 통상정보연구
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• 제7권2호
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• pp.75-94
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• 2005

This study is focused on evaluating the computer-integrated just-in-time (CI-JIT) production system of a semi-conductor manufacturing firm in Korea. Approaching the mid-1980s, the emphasis was on low price, low-cost operations, and quality, especially in USA. American companies have shifted output to low-wage countries like the Philippines, Korea, Japan, Malaysia and allied countries that can make quality products at low prices. Korea and other Asian countries forego short-term profits to gain a solid foothold in a product market, recognizing that larger market share leads to lower cost and higher profit in the long run. They bring manufacturers and suppliers together to improve material management and operation management, using project teams that investigate topics, such as Just-In-Time(JIT)manufacturing, among others. The "Kanban" word means "card" in Japanese, and is used to indicate the desired final delivery schedule. The operation for a particular item produced is scheduled for a specific time. The same process is extended to the external suppliers. More recently, the cards are gradually being replaced by electronic procedures that follow the same concept. Its capacity must be capable of handling the various transactions required by the JIT coverage as well as some allowances for expanded applications.

• 인터넷정보학회논문지
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• 제9권6호
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• pp.155-163
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• 2008

소프트웨어 프로젝트가 착수 후 성공적으로 종료되기 위해서는, 계획에 따라 프로젝트가 잘 진행이 되고 있는지의 여부를 주기적으로 검토하고 만약 문제가 있을 경우에는 적절한 시정 조치를 취하는 프로젝트 통제활동이 필수적이다. 프로젝트 통제활동은 주간회의나 마일스톤 회의 등과 같이 주기적으로 수행되는 보고회의를 통해 이루어지는데, 이때 프로젝트 관리자는 일정, 비용, 작업성과 등을 검토해 봄으로써 프로젝트의 진행 상태를 파악할 수 있다. 프로젝트 통제활동을 지원하는 방법으로 가장 많이 쓰이고 있는 EVM(Earned Value Management)은 일정과 작업성과에 관한 측정치를 비용으로 산정하여, 일정, 비용, 작업성과를 하나의 그래프에 표현하는 방법이다. 프로젝트 관리자는 EVM을 통하여 비용이라는 하나의 단위로 프로젝트의 작업 성취도와 진도율을 정량적으로 관리 할 수 있다. EVM은 전체작업을 단위작업으로 나누어 각 단위작업의 작업 기간과 작업량을 비용으로 환산하여 관리하는데, 주로 프로젝트의 범위가 초반에 정의되고 단위작업의 크기가 큰 경우에 적용이 쉽고 관리가 편하다. 이러한 이유로 폭포수(Waterfall) 기반의 프로젝트에 주로 적용되고 있다. 그러나 XP(eXtreme Programming)기반의 프로젝트에서는 요구사항이 프로젝트 초반에 완벽히 정의되기가 어렵고 단위작업의 크기가 작아, 프로젝트 초반에는 상위레벨 수준으로만 범위가 정의 되고 반복이 진행되면서 점점 상세한 범위가 정의되기 때문에 EVM이 활용되고 있지 않다. 따라서 본 논문에서는 XP에 EVM을 적용할 수 있는 방안인 3단계(Layer) EVM을 제시하고, 조직이 이를 구축하도록 지원하기 위해 CMMI(Capability Maturity Model Integration)의 PMC(Project Monitoring and Control) 프로세스 영역을 기반으로 프로세스를 정립하고, 그에 따른 적용 지침을 개발하였다.

• 산업경영시스템학회지
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• 제31권3호
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• pp.101-109
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• 2008

This paper considers an integrated decision for scheduling and outsourcing(or, subcontracting) of a finite number of jobs(or, orders) in a time-sensitive make-to-order manufacturing environment. The jobs can be either processed in a parallel in-house facilities or outsourced to subcontractors. We should determine which jobs should be processed in-house and which jobs should be outsourced. And, we should determine the schedule for the jobs to be processed in-house. If a job is determined to be processed in-house, then the scheduling cost(the completion time of the Job) is imposed. Otherwise(if the job should be outsourced), then an additional outsourcing cost is imposed. The objective is to minimize the linear combination of scheduling and outsourcing costs under a budget constraint for the total available outsourcing cost. In the problem analysis, we first characterize some solution properties and then derive dynamic programming and branch-and- bound algorithms. An efficient heuristic is also developed. The performances of the proposed algorithms are evaluated through various numerical experiments.

• 한국항해학회지
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• 제8권1호
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• pp.1-16
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• 1984

The economical property of a shipping enterprise, as well as other transportation industries, is determined by the difference between the freight earned and expense paid. This study can be regarded as a division of optimizing ship allocation to routes under the integrated port transport system. Fleet planning and scheduling require complicated allocations of cargoes to ships and ships to routes in order to optimize the given criterion function for a given forecast period. This paper deals with the optimum ship allocation problem minimizing the operating cost of ships in a shipping company. Optimum fleet operating for a shipping enterprise is very important, since the marine transportation is a form of large quantity transport requiring long-term period, and there is a strong possibility to bring about large amount of loss in operation resulting from a faulty ship allocation. Where there are more than one loading and discharging ports, and a variety of ship's ability in speed, capacity, operating cost etc., and when the amount of commodities to be transported between the ports has been determined, then the ship's schedule minimizing the operating cost while satisfying the transport demand within the predetermined period will be made up. First of all a formula of ship allocation problems will be established and then will be constructed to solve an example by the Integer Programming application after consideration of the ship's ability, supply and demand of commodity, amount of commodity to be transported, operating costs of each ship etc. This study will give good information on deciding intention for a ship oprator or owner to meet the computerization current with shiping management.

• 한국정보통신학회논문지
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• 제14권1호
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• pp.242-250
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• 2010

EVMS(Earned Value Management System)는 사업을 관리하는 정부나 사업을 수행하는 업체의 관리자들이 비용과 일정을 주기적으로 추적함으로써 현재의 사업진행 상태를 파악하고 미래를 예측할 수 있는 관리기법이다. 이 관리기법은 미국, 호주 등에서 국방연구개발 사업에 의무적으로 적용해오고 있으며, 그 효율성이 이미 입증된 기법이다. 그러나 외국에서 수행하고 있는 EVMS를 그대로 우리나라에 도입하는 것은 환경적 차이로 인해 많은 문제점을 가지고 있기 때문에 우리나라에 환경에 적합한 EVMS 적용을 위해 연구를 꾸준히 수행하고 있다. 본 논문에서는 먼저 EVMS에 대한 개념을 먼저 고찰 해보고, 저자가 직접 관리하고 있는 차기경구난차량 연구개발사업에 적용한 EVMS 적용실태 분석을 통해 문제점을 도출하고자 한다.

• 보건행정학회지
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• 제30권2호
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• pp.164-177
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• 2020

This study aims to compare the experience of selected countries in operating separate payment system for new healthcare technology and to find implications for price setting in Korea. We analyzed the related reports, papers, laws, regulations, and related agencies' online materials from five selected countries including the United States, Japan, Taiwan, Germany, and France. Each country has its own additional payment system for new technologies: transitional pass-through payment and new technology ambulatory payment classification for outpatient care and new technology add-on payment for inpatient care (USA), an extra payment for materials with new functions or new treatment (C1, C2; Japan), an additional payment system for new special treatment materials (Taiwan), a short-term extra funding for new diagnosis and treatment (NUB; Germany), and list of additional payments for new medical devices (France). The technology should be proven safe and effective in order to get approval for an additional payment. The price is determined by considering the actual cost of providing the technology and the cost of existing similar technologies listed in the benefits package. The revision cycle of the additional payment is 1 to 4 years. The cost or usage is monitored during that period and then integrated into the existing fee schedule or removed from the list. We conclude that it is important to set the explicit criteria to select services eligible for additional payment, to collect and analyze data to assess eligibility and to set the payment, to monitor the usage or cost, and to make follow-up measures in price setting for new health technologies in Korea.