• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1993년도 춘계공동학술대회 발표논문 및 초록집; 계명대학교, 대구; 30 Apr.-1 May 1993
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• pp.36-45
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• 1993

This paper presents a model and a heuristic procedure to design production planning and transportation scheduling systems of critical items, components and products on the basis of material requirement planning concept and transportation planning model. These systems are stemmed from a multi-site multi-product production company in a international economic zone. An example is provided to validate the heuristic procedure developed.

• 지능정보연구
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• 제8권2호
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• pp.71-89
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• 2002

본 논문에서는 컨테이너 터미널의 운영 계획들을 통합된 환경에서 수립할 수 있도록 지원하는 시스템 개발 사례를 소개한다. 과거 터미널 운영 계획이 선석, 장치장, 선적계획 등 단위 계획별로 계획 시스템이 따로 개발되었던 점을 보완하여 각 계획간의 연계 작업 및 재조작이 가능할 수 있도록 하나의 통합된 시스템으로 설계하고 구현하였다. 개발된 시스템은 통합 운영 계획 작성, 사용자 편의성을 고려한 Interface, 규칙에 의한 자동 계획 및 오류에 대한 경고, 계획 수정의 용이성 등을 특징으로 하고 있다.

• International Journal of Naval Architecture and Ocean Engineering
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• 제6권1호
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• pp.162-174
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• 2014

Most shipbuilding scheduling research so far has focused on the load level on the dock plan. This is because the dock is the least extendable resource in shipyards, and its overloading is difficult to resolve. However, once dock scheduling is completed, making a plan that makes the best use of the rest of the resources in the shipyard to minimize any additional cost is also important. Block assignment planning is one of the midterm planning tasks; it assigns a block to the facility (factory/shop or surface plate) that will actually manufacture the block according to the block characteristics and current situation of the facility. It is one of the most heavily loaded midterm planning tasks and is carried out manually by experienced workers. In this study, a method of representing the block assignment rules using a diagram was suggested through analysis of the existing manual process. A block allocation program was developed which automated the block assignment process according to the rules represented by the diagram. The planning scenario was validated through a case study that compared the manual assignment and two automated block assignment results.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1990년도 춘계공동학술대회논문집; 한국과학기술원; 28 Apr. 1990
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• pp.195-208
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• 1990

Flexible Manufacturing System(FMS) is an integrated, computer controlled complex of automated material handling devices and numerically controlled machine tools that can simultaneously process medium-sized volumes of a variety of part types. This paper discusses planning problems that can be solved for efficient use of an FMS and present an integrated decision support system for FMS production planning and scheduling problems. FMSDS(Flexible Manufacturing Systems Decision Support System) consists of data handling modules, part selection module, loading module, load adjusting module, scheduling module and simulation module etc. This paper presents the solution methodology of each subproblems and integrated interfaces between subproblems using hierarchical approaches and loop controls considering the relationships between subproblems. A case study by this model is presented.

• 대한전기학회논문지
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• 제41권1호
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• pp.9-17
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• 1992

Proper resource allocation is also a very important topic in power system problems, especially in operation and planning. One such is optimal maintenance problem in operation and planning. Least cost and highest reliability should be the subjects to be pursued. A probabilistic operation simulation model developed recently by authors is applied to the proboem of optimal maintenance scheduling. Three different methods are compared, marginal maintenance cost, levelized risk and maintenance space. The method by the marginal maintenance costs shows the least cost, the highest reliability and the highest maintenance outage rates. This latter characteristics may considerably influence the results of genetation planning, because the usual maintenance outages obtained from the other methods have shown to be lower.

• 한국컴퓨터산업학회논문지
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• 제5권2호
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• pp.227-233
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• 2004

복합 스케줄링 문제는 컴퓨터의 기획(planning), 스케줄링(scheduling), 제약만족문제(Constraint Satisfaction Problem, CSP), 객체지향개념(object-oriented concept), 에이전트 시스템(agent system) 등의 여러 분야와 관련이 있다. 사용자의 선호도를 고려한 기법은 제약만족문제와 객체지향개념을 스케줄링에 적용하여 복합 스케줄링 문제를 해결하고자 하였다. 본 논문은 사용자의 선호도를 고려한 기법을 예약 문제에 적용하여 예약 시에 일어날 수 있는 문제점들을 해결하고자 하였다 특히 고객들의 만족도를 놀이기 위해서 고객들의 선호도를 고려하여 스케줄링을 한다. 객체에 근거한 예약 스케줄링 기법은 객체 지향 개념을 기반으로 하여 라 객체들이 사건들을 가지고 있으며, 이 사건들을 주어진 제약들에 만족하도록 목표인 보드에 배정하는 기법이다 각 객체들은 전체적인 만족 도를 고려하면서 그 객체들의 우선순위에 따라서 자원을 배정하고, 자원에 대한 객체의 선호도 차이를 가질 수 있게 하였다. 예약 스케줄링을 할 때 제약은 전역 제약과 지 역 제약으로 구성된다. 보드에 대한 정의와 모든 사건들에 대한 정보를 전역 제약으로 사용하고, 각 객체가 가지는 보드의 슬롯들에 대한 선호도를 지역 제약으로 사용한다. 사건의 배정을 실패하지 않고 백크래킹을 최소화하도록 알을 보는(look-ahead) 백크래킹 기법을 사용하여 전체 객체들의 만족 도를 높였다.

• 한국CDE학회논문집
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• 제17권6호
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• pp.409-416
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• 2012

Most of the shipbuilding scheduling researches so far have been conducted with stress on the dock plan. That is due to the fact that the dock is the least extendable resource in shipyards and its overloading is difficult to resolve. However, once the dock scheduling is completed, it is also important to make a plan that make the best use of the rest of the resources in the shipyard, so that any additional cost is minimized. This study automates block allocation process by analyzing the existing manual process that designates production bays for the blocks during the midterm planning. Also, a planning scenario validation method is suggested, where block allocation scenarios based on diagrams are edited and simulated.

• 산업경영시스템학회지
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• 제34권3호
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• pp.123-133
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• 2011

The advanced planning and scheduling(APS) is an well known enterprise information system that provides optimal production schedules and supports to complete production on time by solving the complex scheduling problems including capacity and due dates. In this paper, we focused on the improvement of the APS that is already established on a real company. The existing APS had several drawbacks, thus utilization and satisfaction were very low. We performed the focused group interviews and the process analysis and could find that the end users and developers have various objectives and the frequently used functions are different. We applied the analytical hierarchy process(AHP) to converge opinions of them on quantitative data. The results show that it is necessary to enhance visibility, to improve user interfaces and response speed, and to reconcile the real business process and the APS's process.

• 대한안전경영과학회지
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• 제19권1호
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• pp.181-189
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• 2017

The systematic management of technology infrastructure increasingly becomes critical as it represents the driving power for creating competitive advantage of nations and enterprises. In this sense, public facility and equipment, which is one major asset of technology infrastructure, should be managed effectively, systematically and efficiently to increase its overall equipment effectiveness. However, the manual and off-line communication was the unique way to communicate between the suppliers who provide facilities in the public sector and the customers who utilize the facilities in the industrial sector. This communication way caused invisibility of available usage time and increase of idle time, thereby decreasing the equipment effectiveness. This paper presents an web-based scheduling system that enables real-time collaboration and information sharing for increasing the equipment effectiveness. The designed system performs scheduling, facility management, order management and customer relationship management in an on-line platform, and carries out the processing and storing of relevant information in an integrated database. The paper includes a development approach to identify business process models and standardized system models by using object-modeling technique. The deliverable of the present work will contribute to increasing the equipment effectiveness by enhancing visibility, transparency and predictability by means of the integration with a legacy Enterprise Resource Planning.

• 한국항공우주학회지
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• 제30권1호
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• pp.139-146
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• 2002

다목적 실용위성 1호의 초기운영과 정상임무운영을 위한 임무 및 명령계획 작업은 MAPS(Mission Analysis & Planning Subsystem)의 임무 및 명령계획 S/W를 이용하였다. 시간이 지날수록 요구되는 임무양이 증가하면서 수동작업이 많아 요구되는 기존 S/W를 이용하여 임무운영을 수행할 경우 안정성이 크게 저하되었으며, 자동 처리과정이 부족하여 결과검증에 소모되는 시간도 증가하였다. 다목적 실용위성 관제국은 이를 개선하고자 보다 신속하고 안전하게 임무 및 명령계획 작업을 수행할 수 있으며, 중요 과정들을 자동화하여 임무운영의 안정성을 높일 수 있는 새로운 임무 및 명령계획 S/W를 개발하였다. 본 논문은 다목적 실용위성 1호의 임무계획 및 자동 명령계획표 생성기(KSCG, KOMPSAT-1 Scheduling & Automatic Command Plan Generator)의 개발내용과 실제 운영결과를 기술하였다. KSCG를 사용한 결과, 작업능률 향상과 임무운영 안정성을 획기적으로 높였다.