엔진 시 운전 후 엔진 내부 주요 부품 상태를 검사하기 위해 분해하는 작업을 엔진 개방 작업 공정이라 하는데 엔진 개방 작업 공정 중 콘 로드 분해 시간이 평균 대당 187.8분으로 표준 시간 90분을 과도하게 초과하여 시급히 개선이 요구 되어 현상파 악, 원인분석, 대책수립 및 실시를 하여 개선 후 86.7 분으로 감소하여 생산성 향상으 로 인한 원가절감을 연간 4200만원 달성하였다.
This paper introduces the Hierarchical Decomposition Mapping Diagram (HDMD) that represents the systematic architecture of axiomatic design. HDMD is composed of the contents of module symbol and the independence/dependence relationship between FRs (Functional Requirements) and DPs (Design Parameters). The examples presented in this paper show the strength of the diagrams in comparison with other studies of systematic architectural representation tools, such as hierarchical diagram, module-junction diagram and system flow diagram.
선박엔진에서 회전을 하면서 연료 압축 흡기 배기 밸브를 일정 간격으로 여 닫는 축을 캠샤프트라 한다. 엔진 선행 조립 작업시간을 조사해 보니 켐 샤프트 조립 공정 이 공정별 표준시간 대비 소요시간이 353.4 분 으로 표준시간 156.2 분 보다 높아 시급히 개선이 요구되어 캠 샤프트 조립 시간 항목별 파레토도 분석을 통해 샤프트 조립 시간을 중점항목으로 선정하여 개선하여 개선 후 31.1 분으로 감소하였으며 연간 4800만원 원가절감을 하였다.
As the whole society grows insensible to its own safety, we keep having continuous big fires such as "Deagu Subway Arson Attack" and "The fire at a football training camp in Cheonan Elementary School." However, we fail to have at least a guidbook which contains minimal information regarding how to prevent big fires or arson attacks, moreover there isn't any educational system that allows the public to have a good habit for their safety. As for developed countries right after industrialization, the education on fire prevention and safety became mandatory for all schools and became one of their required school curriculum. If this becomes the case in Korea, Korea will be able to reduce the potential casualties in case of big fires and emergencies. Therefore, in this research, we would like to establish some appropriate measures and standards for fire prevention and safety based upon the current and immature situations in Korea.
When using the original Angio Intervention, one had to put Guide wire, Catheter on patient's leg so that there were curves according to patients and the possibility of patients moving made it inconvenient to proceed. Thus, by making supplementary tool shaped of table, it minimized the inconvenience of patients and operator, increasing the convenience of the process and thereby evaluating the utility and its usefulness. The main material of supplementary tool was used with cost efficient Fomax material, and by considering the patient's lower limb, and the length of tools when doing Angio Intervention, it was made as 1300mm, 600mm at the front, 500mm at the back. Also, considering the weight of the tool, it was manufactured with thickness of 5mm and 10mm with the same design, and evaluated by using survey of 14 medical personnel using the tool in A University Hospital, Daejeon. When manufacturing and using supplementary tool, it became heavier as the thickness increased. Whereas, the thinner, the lighter the tools were, however, had unstability which cause lack of safety. Despite the fact, they responded that they had more convenience of using 5mm and 10mm tool compared to when they did not have at all, and through this, we could evaluate that the use of supplementary tool is useful to the procedure. Accordingly, when doing Angio Intervention, we could find out that it is useful to use the supplementary tools, and by reducing the weight and increasing the safety, if we can make use of this kind of supplementary tools, it would be more useful to the procedure.