• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 추계학술대회 논문집
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• pp.447-448
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• 2012

• 유통과학연구
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• 제8권4호
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• pp.35-41
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• 2010

Although dictionary definition of standardization is 'to prevent disordered complexity and to make and use rules for reasonable simplification or unification, from a position of shop-floor operations of distribution, it is directly connected to efficiency, that is 'productivity equals cost savings'. This study analyzed influence of standardization of agricultural product packages in hypermarkets on costs in stakeholders of distribution channel such as suppliers, distribution centers and hypermarkets. The research findings demonstrated that it would influence manufacturing costs of suppliers and improve shop productivity of hypermarkets.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2000년도 추계학술발표논문집
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• pp.217-234
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• 2000

Approximately normalized control charts, called Q charts, have been given Quesenberry(1991) for charting in process of short-run, job-shop, etc. We consider a Q chart with inspection error for job-shop floor under geometric distribution, which can be used for processes when a fraction nonconforming is very small. Our results would be applied for designing other control charts with inspection error.

• 산업공학
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• 제12권2호
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• pp.329-336
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• 1999

Job efficiency and productivity of a manufacturing system with frequent job schedule changes are affected by performance of information system between job order planners anti manufacturing device operators. This paper describes implementation of concurrent information system which can active identify machine status and dispatch job orders to operators in a machine shop. Client and server environment for various machinery is implemented using OSI based network between shop floor control system and manufacturing devices. Portability and scalability are among many characteristics of the implemented system. The developed client and server system is expected to realize high productivity for manufacturing device.

• 시스템엔지니어링학술지
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• 제11권2호
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• pp.95-105
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• 2015

Manufacturing Execution System(MES) is in charge of manufacturing execution in the shop floor based on the inputs given by high level information such as ERP, etc. The typical MES implemented is not tightly interconnected with shop floor control system including real (or near real) time monitoring and control devices such as PLC. The lack of real-time interfaces is one of the major obstacles to achieve accurate and optimization of the total performance index of the shop floor system. Smart factory system in the paradigm of Industry 4.0 tries to solve the problems via CPS (Cyber Physical System) technology and FILS (Factory In-the-Loop System). In this paper, we conducted Systems Engineering Approach to design an advanced MES (namely Smart MES) that can accommodate CPS and FILS concept. Specifically, we tailored Systems Engineering Process (SEP) based on an International Standard formalized as ISO/IEC 15288 to develop Stakeholders' Requirements (StR), System Requirements (SyR). The deliverables of each process are modeled and represented by the SysML, UML customized to Systems Engineering. The results of the research can provide a conceptual framework for future MES that can play a crucial role in the Smart Factory.

• 한국컴퓨터정보학회논문지
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• 제14권10호
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• pp.55-61
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• 2009

본 연구는 웨이퍼 다이싱 공정의 가공정보들을 수집하여 실시간으로 관리하는 생산시점의 정보관리시스템에 대한 연구이다. 개발한 시스템은 POP용 단말기, 라인 컨트롤러 및 네트웍으로 구성된다. LAN은 상위관리시스템을 연결하며, RS485 네트웍은 하위시스템인 라인 컨트롤러와 단말기를 연결한다. 라인 컨트롤러는 POP 단말기와 서버를 연결하기 위해 사용된다. 웨이퍼의 실시간 가공정보는 기계, 제품, 작업자의 정보발생원들로부터 얻고, 이들은 최적절삭조건을 계산하기 위하여 사용된다. 수집된 정보는 절삭속도, 순수의 여부, 처리 중인 블레이드의 누적 절삭량 및 불량 웨이퍼의 수이다. 상위시스템의 생산계획정보는 웨이퍼 가공공정의 관리를 위해서 현장에 전달되며, 생산결과정보는 현장에서 수집하여 서버로 전달되고 필요한 형태로 정보가 가공되어 공정관리용 정보로 사용된다. 개발한 시스템을 반도체 웨이퍼 가공공정에 적용한 결과, 생산진전상태, 각 기계에 대한 작업시간 및 비작업시간의 해석 및 웨이퍼 불량률의 해석이 가능하며, 이들은 다이싱 공정의 품질 및 생산성 향상을 위한 생산공정 관리정보로 활용할 수 있을 것이다.

• 환경위생공학
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• 제16권4호
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• pp.9-20
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• 2001

The objective of this study was to improve sanitary conditions at the beauty shops by informing the owners and employees to be aware of the public health. The data were obtained by the Physical investigation (August 1 to 30, 2001) of the sanitary Problems at 112 beauty shops in Daegu Metrpolitan area and by the surveys from the employees and customers. By analysis these data with SAS/PC+(ver. 6.12) and $x^2-test$, we have obtained the following results. 1. The numbers of the beauty shop workers (67.86% of the shops) were two including the owner, and only 18.75% of the workers had the regular public health training session. Even at the training sessions, no public health specialist was available as an instructor. 2. Sanitary conditions of the floor (92.76%), washer (88.93%) and rest room (74.11%) at the beauty shops were satisfactory. However, only 3.57% of the beauty shop used the vacuum cleaner that would be far more effective than the bloom to remove hairs from the floor. 3. About 91.07% (102 shops) did not or poorly sterilize equipments, and 91.76% (103 shops) did not store the sterilized or non-sterilized equipments separately. The shops that had the ultraviolet sterilizer that is required by the public health regulation were 53.57% (60 shops), and only 2.67% (3shops) actually used it. 4. About 82.14% (72 shops) used Oxyclean and detergent for washing the fabrics such as towels and gowns. About 11.61% (13 shops) used only detergent and 3.57% (4 shops) used the boiling sterilization method. No shop used the customer gown once per customer, and only 2.68% (3 shops) washed the used gown daily.

• 한국정보통신학회논문지
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• 제15권11호
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• pp.2313-2320
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• 2011

조선소에서 판넬블록 생산공정은 가장 많은 물량을 처리해야 하는 중요하고 복잡한 공정이 고, 모든 선박 및 해양구조물의 하부는 반드시 판넬블록 생산 공정을 거쳐야 하기 때문에 판넬블록 생산공정은 병목공정으로 평가된다. 공정의 생산성을 극대화하기 위해 본 논문에서는 디지털 선박생산에서 가장 중요한 기술 중의 하나인 시뮬레이션과 최적화기법을 활용하여 조선생산실행시스템(SPEXS)을 개발하였고, 판넬블록조립장 적용사례로 SPEXSPanel을 구축하여 향상된 일정계획을 수립하는 효과를 보였다. 더불어 SPEXS-Panel은 지속적인 개선을 통해 야드 생산성 향상에 도움을 줄 수 있을 것으로 기대된다.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2008년 추계학술발표대회 논문집
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• pp.278-283
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• 2008

This paper aims to clarify physical characteristic of empty house and vacant floor in historic district on Cheongju. First, most empty houses are the timbered houses of 1 story, and it will be built before the 1969. And the building of a vacant floor has a common non-residential buildings of 4 stories, and there are many buildings of RC structure built in the 1980s. Second, when the situation of an empty house and a vacant floor was seen, there was most the second floor only by the number of room, but when seen from the ratio of the whole number of rooms, there were most the third floor and the fourth floor. Third, when the situation of a vacant floor and a vacant room was seen from use, there were most store, shop and office. Relevance with this as close as reduction of the population in the center of Cheongju is seen. Moreover, the grope of a method which can utilize this is required.

• 산업공학
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• 제9권2호
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• pp.3-17
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• 1996

Productivity improvement is one of the most challenging problem facing the motor industry. This paper deals with the lot sizing and production scheduling problems of the side frame press shop in a domestic truck manufacturing company. The problems can not be solved simultaneously due to the computational complexity. Thus, we present a heuristic method which solves the two problems sequentially with the objective of maximizing the press utilization while maintaining a minimum inventory level. A micro-computer-based software is developed for easy implementation of the heuristic in the shop floor level.