웨이퍼를 위한 생산 라인이 중설되었을 경우 현재 가지고 있는 라인을 기반으로 하여 시간과 생산량을 조사한 수 5M라인과 50M 라인의 문제점을 파악하고 각 공정별 대기시간과 재고를 파악하여 최적의 생산라인을 만들 수 있게 한다. Simulation은 ARENA를 사용하였으며 시간과 생산 수량의 Data는 기존의 생산라인에서 조사하였다. 새로운 생산 라인을 증설할 때 가장 큰 문제점인 재고와 라인 평준화 부분에 대한 자료가 Simulation을 통하여 나타나져 문제 분석이 효율적으로 이루어 질수 있으나 통계적인 예측을 하기에는 시간이 너무 짧아 기계의 평균적인 작업 시간과 이동시간을 가지고 작품을 만들었으며, 사실과 근사한 값을 가지도록 노력을 하였다. 그 결과, 가동률연과 WIP부분에서 문제점이 발생을 하는 것을 찾을 수 있었으며 이결과를 바탕으로 실제 생산라인을 설계함에 있어 도움을 줄 수 있다. Solar Wafer 생산라인은 표준화가 이루어져 있지 않으며 자동화 또한 이루어져 있지 않아 많은 생산을 하는데 어려움이 있으며 공정의 최적화를 찾기 힘든 부분에 대한 생산라인의 문제점을 파악하여 라인의 평준화에 도움을 줄 수 있으며 생산되기 전 월별 주별 생산량을 미리 파악하여 생산관리에 도움을 줄 것이라 기대된다.

This research has been studied a quality management method of silicon wafers for solar cells using the time series analysis. The model which can forecast conversion efficiency in state of a silicon wafer of a solar cell was presented newly and studied its limits. The first approach analyzed correlation between quality characteristics which was currently known and the quality of the last production. Also, The special factor which was unknown to a general factor until now was found. This paper presented the time series analytical model which was transformed in order to forecast exactly the influence that these special quality characteristics were immersed in to the conversion efficiency of cells. Using the correlation of forecasted value along the arbitrary change of measured value, the most optimized reduction factor for calculation of weight to be suitable for this model was defined.

This study is designed to predict the overall electric power load, to apply the method of time sharing and to reduce simultaneous load factor of electric power when authorized by user entering demand plans and using schedules into the user’s interface for a certain period of time. This is about smart grid, which reduces electric power load through simultaneous load factor of electric power reduction system supervision agent. Also, this study has the following characteristics. First, it is the user interface which enables authorized users to enter and send/receive such data as demand plan and using schedule for a certain period of time. Second, it is the database server, which collects, classifies, analysis, save and manage demand forecast data for a certain period of time. Third, is the simultaneous load factor of electric power control agent, which controls usage of electric power by getting control signal, which is intended to reduce the simultaneous load factor of electric power by the use of the time sharing control system, form the user interface, which also integrate and compare the data which were gained from the interface and the demand forecast data of the certain period of time.

To meet the needs of customer, manufacturing companies are diversifying product making methods. In order to adapt to changes, companies are trying to find a new manufacturing system. In this research, MTS(Make to Stock) and MTO(Make to Order) production m

Because it is unable to be systematic and it progress the management diagnosis in comparison with the large enterprise periodically, the most of our country small and medium companies does not correspond to the suddenly change environment agilely. Small and medium companies have a lot of the place where the company culture is not settled in comparison with the large enterprise. And the employees of satisfaction are low. This research is the research that it analyze the manufacturing job process based on the systematic management consulting for small and medium factory and draws the execution subject for the improvement of productive capacity and management efficiency. The investigation classifies as the job process and management control and organizational culture and the work satisfaction analyze the investigation. The research target company installs against small and medium manufacturer of the Gumi area of Gyeong Sang Buk Do Province. The high level of process can be redesigned. And the inefficiency of the category of manufacture and waste is removed through the management diagnosis procedure of presenting in this research the production system construction which is suitable for the own company manufacture business is promoted and many contributions seem to be protected.

This study looks at a company which introduced SAP program, one type of ERP systems, and how the firm copes with the problems which happen in business process. The research tried to solve the problem by IDEAL method of process software improvement methodo

소규모의 기업이 모회사가 성장함에 따라 급속한 성장을 하면서 눈에 보이지 않는 문제점이 발생하고 경영의 비효율화로 인해 생산 업무에 원활한 지원을 할 수 없는 상태의 중견기업의 기업환경을 분석하고 작업 환경을 분석하여 기업이 내부에서 확인 할 수 없는 문제점을 찾아 성장하는 기업이 앞으로 나아갈 방향에 대한 단계별 추진과제를 선정하여 새로운 기업환경에서의 경영효율화와 경영최적화를 이루는 프로세스를 구현하였다. 기업 환경 분석은 내외부 수준분석과 각 부서별 인터뷰, 설문조사를 중심으로 업무 현황 및 당면과제에 대하여 SWOT분석을 통해 나타내었고, 각 부서별 Issue 및 개선 사항은 As-Is Flow를 통하여 프로세스, 시스템, 사람, 기업환경의 네 가지 관점에서 주안점을 찾아내었다. SWOT분석과 As-Is Flow를 기반으로 경영업무 정상화를 위한 우선 실행과제를 선정하였고 선정된 우선순위에 따라 중장기적인 종합추진일정계획을 수립하였다.

본 실험은 고품질의 콩나물 생산을 위한 기초연구로서 식물생장조절제를 이용한 세근발생 억제 및 하배축비대촉진을 위한 처리 방법을 구명하고자 실험을 수행하여 다음과 같은 결과를 얻었다. 식물생장조절제 중 GA3나 NAA 처리는 세근발생 억제효과가 미약하였다. 반면 BAP처이믐 세근발생이 전혀 일어나지 않았고 하배축의 비대를 촉진하였는데, 저농도인 10mg·L-1 및 15mg·L-1 처리에서도 그 효과가 인정되었다. BAP의 처리시간은 짧을수록 하배축 비대가 촉진되었고 하배축 비대를 촉진하는 처리시간은 6시간 처리였다. BAP 처리 후 24시간 간격으로 관수는 세근 발생율이 낮았고 하배축 비대는 촉진되었다. 인돌비는 적정농도로 알려져 있는 4.2%보다 낮은 농도인 1.1%용액을 처리하더라도 세근 발생이 크게 문제되지 않았다.

  본 연구는 호텔에서 방 예약을 받는 시스템에서, 전술적으로 방의 등급을 정해 예약을 받는 방 배정 문제에서, 효과적인 절차를 총 수익에 관련되는 여러 가지 요소들을 고려하여, 총 수익을 최대화하는 알고리즘을 개발하였다. 이익을 최대화하고, 자원들의 효과적인 배분을 위해서 먼저 시장의 차별화가 어떻게 다르게 형성되는가를 분석하고, 이 결과를 전략적인 계층 방 분배 문제를 해결하는 데에 적용하였다. 하룻밤을 지내는 손님을 위한 예약에서는 동적인 모델링(

Scheduling of dismantling old research reactor need to consider time, cost and safety for the worker. The biggest issue when dismantling facility for research reactor is safety for the worker and cost. Large portion of a budget is spending for the labor cost. To save labor cost for the worker, reducing a lead time is inevitable. Several algorithms applied to reduce read time, and safety considered as the most important factor for this project. This research presents three different dismantling scheduling scenarios. Best scenario shows the specific scheduling for worker and machine, so that it could save time and cost.

The CLASS (Computerized LAyout Solutions using Simulated annealing) deals with the inter-cell and intra-cell layout problems in a cellular manufacturing environment. It focuses on the relative placement of manufacturing cells to minimize the total material flow (cost). The method is based on simulated annealing, which has been successfully applied for solving facility layout problems. This algorithm has a character of the independence of the final solution to the initial solution. There are 2 comparisons were made with applying 2-Opt algorithm to the CLASS when finding initial variables and used 2-Opt algorithm again after finding a solution by using 2-Opt algorithm to the CLASS to accommodate to improve the output.

This paper proposes a hierarchical approach to the machine loading problem when the workload and tool magazine capacity of each machine are restrained. This heuristic approach reduces the maximum workload of the machines by partially grouping them. This research deals with situations where different groups of machines performing the same operation require different processing times. This work proposes a solution that is comprised of two phases. In first phase, demand is divided into batches and then operations are allocated. In Phase II, the processing time of the operation is different for each machine group, which is composed of the same identical machines; however, these machines can perform different sets of operations if tooled differently. In partial grouping, each machine is tooled differently, but they can assist one another in processing each individual operation.

In this paper we develop an efficient procedure for solving the tactical-level room allocation problem for hotel industry by incorporating other sources of revenue into overall Revenue Management (RM) system. To maximize profits and allocate wisely available resources, first, determine how different market segments contributed. And apply this to an efficient procedure for solving tactical-level room allocation problem for the hotel industry by combining the dynamic model for handling single-night reservation requests and the static model for handling multi-night reservation requests.

페트리 네트(Petri Nets)는 이산 사건 시스템을 모델링할 수 있는 그래픽하고, 수학적인 도구이다. 본 연구는 유연 제조 시스템을 확률적인 페트리 네트(Stochastic Petri Nets)중의 하나인 임베디드 마코프 체인(Embeded Markov Chain)에 도입하고, 임베디드 마코프 체인의 방법 중에 하나인 일반화된 확률적 페트리 네트(Generalized Stochastic Petri Nets)에 적용시켰다. 그리고 결과치의 정확성을 알

This paper is for applying interactive fuzzy linear programming for the problem of product mix planning, which is one of the aggregate planning problem. We developed a modified algorithm, which has two-phase approach for interactive fuzzy linear programming to get a better solution. Adding two-phase method, we expect to obtain not only the highest membership degree, but also a better utilization of each constrained resource.

This study proposes a new approach which combines Data Envelopment Analysis (DEA) and the Analytic Hierarchy Process (AHP) techniques to effectively evaluate Decision Making Units (DMUs). While DEA evaluates a quantitative data set, employs linear programming to obtain input and output weights and ranks the performance of DMUs, AHP evaluates the qualitative data retrieved from expert opinions and other managerial information in specifying weights. The objective of this research is to design a decision support process for managers to incorporate positive aspects of DEA's absolute numerical evaluations and AHP's human preference structure values. It is believed that a pragmatic manager will be more receptive to the results that include subjective opinions incorporated into the evaluation of the efficiency of each DMU efficiency when the AHP and DEA are combined simultaneously. The WPDEA method provides better discrimination than the DEA method by reducing the number of efficient units.