• Journal of Communications and Networks
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• 제4권2호
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• pp.128-135
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• 2002

We propose a new space priority mechanism, and analyze its performance in a single Constant Bit Rate (CBR) server. The arrival process is derived from the superposition of two types of traffics, each in turn results from the superposition of homogeneous ON-OFF sources that can be approximated by means of a two-state Markov Modulated Poisson Process (MMPP). The buffer mechanism enables the Asynchronous Transfer Mode (ATM) layer to adapt the quality of the cell transfer to the Quality of Service (QoS) requirements and to improve the utilization of network resources. This is achieved by "Selective-Delaying and Pushing-ln"(SDPI) cells according to the class they belong to. The scheme is applicable to schedule delay-tolerant non-real time traffic and delay-sensitive real time traffic. Analytical expressions for various performance parameters and numerical results are obtained. Simulation results in term of cell loss probability conform with our numerical analysis.

• 한국구조물진단유지관리공학회 논문집
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• 제12권4호
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• pp.107-114
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• 2008

현재 각 관리 주체별로 절토사면에 대한 유지관리를 시행하고 있으나 평가항목 및 평가모형이 다양하고 접근방법이 상호보완적이지 못하므로 보편성 및 객관성이 부족한 실정이다. 따라서, 본 연구는 기존 절토사면 평가기법에 대한 분석을 통하여 합리적인 모형개발을 위한 접근을 시도하고 붕괴사례 분석을 통하여 붕괴 주요원인 및 인자를 발굴하고 이를 계층분석기법(AHP)을 이용하여 기존 절토사면의 조사 평가단계에서 조사우선순위를 결정하기 위한 평가표를 작성하였다.

• Industrial Engineering and Management Systems
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• 제15권1호
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• pp.11-18
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• 2016

This paper considers a scheduling problem in a flexible job shop with a reconfigurable manufacturing cell. The flexible job shop has both operation and routing flexibilities, which can be represented in the form of a multiple process plan, i.e. each part can be processed through alternative operations, each of which can be processed on alternative machines. The scheduling problem has three decision variables: (a) selecting operation/machine pairs for each part; (b) sequencing of parts to be fed into the reconfigurable manufacturing cell; and (c) sequencing of the parts assigned to each machine. Due to the reconfigurable manufacturing cell's ability of adjusting the capacity, functionality and flexibility to the desired levels, the priority scheduling approach is proposed in which the three decisions are made at the same time by combining operation/machine selection rules, input sequencing rules and part sequencing rules. To show the performances of various rule combinations, simulation experiments were done on various instances generated randomly using the experiences of the manufacturing experts, and the results are reported for the objectives of minimizing makespan, mean flow time and mean tardiness, respectively.

• 한국의류학회지
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• 제31권4호
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• pp.615-623
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• 2007

This study aimed to construct an effective decision-making model on selection of cloth stores using AHP technique. The proposed AHP structure consists of three levels. The highest level includes the cloth stores alternative which are department store, specialty store, and a clothes store. The second level consists of the key performance measurements for evaluating the optimal selection of cloth stores, such as location, facilities, product, service, and promotion. The lowest level consists of items which affects the performance measurements in the upper level. The items are convenience location, courteous service, decor/ambience, availability of parking, etc. The data for this research were collected from questionnaires of 132 in Busan. Data were analyzed by frequency and AHP. As the result of this study, 'product' was decided as a most important item in department store, while 'location' was decided as a most important item in specialty store and a clothes store. And 'variety goods' evaluated as that of first priority in the totality evaluation items in department store, but 'convenience location' evaluated as that of first priority in the totality evaluation items specialty store and a clothes store.

• 동의생리병리학회지
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• 제29권1호
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• pp.66-71
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• 2015

The purpose of the study is to establish priorities in integrated medicine policy. Delphi method was used in conducting a survey on integrated medicine specialists regarding the policies of integrated medicine and actions. For specialists in integrated medicine, total 17 persons selected included scholars who performed minimum one study on integrated medicine, medical staff who performing integrated medical service at institutions that implemented integrated medical care or those who were involved in creating or implementing policies on integrated medicine. The first Delphi-method survey conducted from Apr. 14 through 18, while the second survey was carried out from Apr. 21 through 25. To prioritize the policies based on the results of the mini Delphi-method survey, Analytic Hierarchy Process(AHP) was performed for 15 persons answered to mini Delphi-method from May 2 through 16, 2014. From the Delphi-method survey, four policies and 16 actions were obtained. AHP showed the first priority placed on 'Building the Infrastructure of Industrialization in the Integrative medicine' of the 4 policies and 'Developing new diagnostic and treatment instruments' was given the highest priority of the 16 actions. For implementation of integrated medicine policy, the 4 policies and the 16 actions found in this research require government support and should be urgently implemented according to its priority.

• 한국안전학회지
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• 제39권1호
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• pp.16-26
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• 2024

This study aims to introduce a method for risk assessment analysis aimed at preventing electrical fires within the manufacturing industry. Initially, we provided a functional block diagram illustrating the electrical equipment employed in various processes within a food manufacturing company in Chungcheongbuk-do. Subsequently, we categorized the components of each machine outlined in the functional block diagram and determined the priority of failure for each classified component. Upon implementing the model in the frying process of the food manufacturing company, specific components, including MC, motor, mixer heater, electric wiring, and terminal block, exhibit a risk priority number (RPN) of 40 or higher. This identified an electrical issue within the manufacturing process and environment. Consequently, we propose a methodology to identify latent failure modes that could escalate into fires or systemic issues if not promptly addressed. It is essential to note that while the FMEA presented in this study may not immediately impact food manufacturing, its applicability extends to various workplaces.

• 한국경영과학회지
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• 제19권3호
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• pp.41-51
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• 1994

The Analytic Hierarchy Process (AHP) is widely used for evaluation of large projects. If a group of experts with different expertise are involved in a AHP decision, they need some way to aggregate their opinions. In this paper, we suggest a way to aggregate the experts' priorities in a given hierarchy using the concept of the Bayesian decision analysis. A criterion that can be used for screening out unreliable data is introduced, and it is used for priority aggregation. Some numerical results are shown to illustrate the procedure.

• 경영과학
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• 제20권2호
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• pp.151-163
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• 2003

Although there has been growing interests in outsourcing the logistics sectors in the industry, not much research was undertaken to provide the processes and standards in choosing the right 3PL for the company. In this research, we attempt to provide the 3PL selection criteria and its priority orders. We surveyed and interviewed the various industry experts and analyzed results using Analytic Hierarchy Process(AHP). The study reveals that manufactures and logistics companies have different understanding of the selection criteria and priorities in outsourcing the 3PL.

• Journal of applied mathematics & informatics
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• 제5권3호
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• pp.643-658
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• 1998

In this paper we analyze the performance of a statistical ATM multiplexer with bursty input traffic and two thresholds in the buffer by using queueing model. Two priority levels are considered for source traffic which is modeled by Markov Modulated Poisson Process to represent the bursty characteristics. Service time distributions of two priority sources are assumed to be same and deterministic for ATM environment. The partial buffer sharing scheme with one threshold may experience a sensitive state change around the threshold. But the proposed multiplexer with two thresholds avoids this hysterical phenominon to improve the system operation.

• 실천공학교육논문지
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• 제14권3호
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• pp.513-522
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• 2022

강의평가는 대학교육의 질을 향상시키고 수업을 개선하는데 유용한 정보로 활용된다. 본 연구는 강의평가를 구성하는 요인을 탐색하고자 선행연구와 FGI를 통해 구성요인을 도출하고 계층분석법(AHP: Analytic Hierarchy Process)을 통해 요인간 상대적 중요도 및 우선순위를 파악하였다. 이를 위해 5개의 구성요인과 15개의 평가항목을 도출하였다. 강의평가 요인개발의 전문성과 공정성을 확보하기 위해 학생과 교원을 대상으로 설문을 실시하여 총 20부의 유효한 자료를 수집하였고, 일치도 검증을 완료한 자료를 토대로 각 평가항목의 가중치를 산출하였다. 분석 결과 강의평가 요인구성에 있어서 학생은 수업 내용, 수업 방법, 수업 운영, 수업 평가, 수업 계획 순으로, 교원은 수업 내용, 수업 운영, 수업 방법, 수업 평가, 수업 계획 순으로 중요하다고 평가하였다. 본 연구 결과를 바탕으로 대학교육의 질 관리 차원에서 강의평가의 효율성과 신뢰성 향상을 위해 다양한 분석과 연구가 있기를 기대한다.