• 한국신뢰성학회:학술대회논문집
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• 한국신뢰성학회 2001년도 정기학술대회
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• pp.277-278
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• 2001

The successful operation of a product In service depends upon the effective provision of logistic support in order to achieve and maintain the required levels of performance and customer satisfaction. Logistic support encompasses the activities and facilities required to maintain a product (hardware and software) in service. Logistic support covers maintenance, manpower and personnel, training, spares, technical documentation and packaging handling, storage and transportation and support facilities.The cost of logistic support is often a major contributor to the Life Cycle Cost (LCC) of a product and increasingly customers are making purchase decisions based on lifecycle cost rather than initial purchase price alone. Logistic support considerations can therefore have a major impact on product sales by ensuring that the product can be easily maintained at a reasonable cost and that all the necessary facilities have been provided to fully support the product in the field so that it meets the required availability. Quantification of support costs allows the manufacturer to estimate the support cost elements and evaluate possible warranty costs. This reduces risk and allows support costs to be set at competitive rates.Integrated Logistic Support (ILS) is a management method by which all the logistic support services required by a customer can be brought together in a structured way and In harmony with a product. In essence the application of ILS:- causes logistic support considerations to be integrated into product design;- develops logistic support arrangements that are consistently related to the design and to each other;- provides the necessary logistic support at the beginning and during customer use at optimum cost.The method by which ILS achieves much of the above is through the application of Logistic Support Analysis (LSA). This is a series of support analysis tasks that are performed throughout the design process in order to ensure that the product can be supported efficiently In accordance with the requirements of the customer.The successful application of ILS will result in a number of customer and supplier benefits. These should include some or all of the following:- greater product uptime;- fewer product modifications due to supportability deficiencies and hence less supplier rework;- better adherence to production schedules in process plants through reduced maintenance, better support;- lower supplier product costs;- Bower customer support costs;- better visibility of support costs;- reduced product LCC;- a better and more saleable product;- Improved safety;- increased overall customer satisfaction;- increased product purchases;- potential for purchase or upgrade of the product sooner through customer savings on support of current product.ILS should be an integral part of the total management process with an on-going improvement activity using monitoring of achieved performance to tailor existing support and influence future design activities. For many years, ILS was predominantly applied to military procurement, primarily using standards generated by the US Government Department of Defense (DoD). The military standards refer to specialized government infrastructures and are too complex for commercial application. The methods and benefits of ILS, however, have potential for much wider application in commercial and civilian use. The concept of ILS is simple and depends on a structured procedure that assures that logistic aspects are fully considered throughout the design and development phases of a product, in close cooperation with the designers. The ability to effectively support the product is given equal weight to performance and is fully considered in relation to its cost.The application of ILS provides improvements in availability, maintenance support and longterm 3ogistic cost savings. Logistic costs are significant through the life of a system and can often amount to many times the initial purchase cost of the system.This study provides guidance on the minimum activities necessary to Implement effective ILS for a wide range of commercial suppliers. The guide supplements IEC60106-4, Guide on maintainability of equipment Part 4: Section Eight maintenance and maintenance support planning, which emphasizes the maintenance aspects of the support requirements and refers to other existing standards where appropriate. The use of Reliability and Maintainability studies is also mentioned in this study, as R&M is an important interface area to ILS.

• 대한환경공학회지
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• 제31권10호
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• pp.845-854
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• 2009

최근 전 세계적으로 환경 중에 잔류하는 항생물질로 인한 항생물질 내성박테리아의 발현에 대한 우려가 커지고 있다. 그러나 국내의 경우 이에 대한 기초자료 확립을 위한 액상(수질)과 고상(토양, 저질토)에 잔류하는 항생물질의 동태와 이동에 대한 연구는 극히 드문 실정이다. 이에 본 연구에서는 국내 우분 퇴비화 시설에 인접한 농경지 토양과 지표수 및 저질토에 대한 항생물질 모니터링을 실시하여 tetracycline 계열의 항생물질 3종(tetracycline, chlortetracycline, oxytetracycline)과 sulfonamide 계열의 항생물질 3종(sulfamethazine, sulfamethoxazole, sulfathiazole)에 대한 분포특성을 살펴보았다. 항생물질은 고형상추출(SPE, solid phase extraction)을 실시한 후 고성능액체크로마토그래피 질량분석기(HPLC/MS)로 분석하였다. 이를 통해 검출된 환경 중 항생물질의 농도는 지표수에서 BDL ~0.71 ${\mu}g$/L, 저질토에서 BDL ~27.61 ${\mu}g$/L, 농경지 토양에서 0.12~157.33 ${\mu}g$/L 수준으로 나타났으며 퇴비화 시설과 인접한 지점의 시료에서 상대적으로 높은 수준의 항생물질이 검출되었다. 이를 통해 퇴비화 시설이 환경 중에 존재하는 항생물질에 영향을 주고 있음을 알 수 있었다. 한편 수질시료에 비해 저질토와 토양에서 항생물질이 높은 농도로 검출되었으며 이는 항생물질의 물리화학적 특성에 기인하는 것으로 판단되었다. 장기적으로는 저질토와 토양에서 항생물질 내성박테리아 발현이 우려되므로 향후 항생물질의 환경 중 이동 및 잔류특성 평가를 위한 장기 모니터링 연구가 필요할 것으로 판단된다.