• 산업경영시스템학회지
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• 제23권59호
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• pp.97-103
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• 2000

This study considers the design of life test sampling inspection plans by attributes for failure rate level qualification at selected confidence level. The lifetime distribution of products is assumed to be exponential. MIL-STD-690C and KS C 6032 standards provide this procedures. But these procedures have some questions to apply in the field. The cost of test and confidence level($1-{\beta}$ risk) are the problem between supplier and user. So, we suggest that the optimal life test sampling inspection plans using expected cost model considering product cost, capability, environmental test cost, etc.

• 품질경영학회지
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• 제15권2호
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• pp.55-60
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• 1987

A rectifying inspection plan which assumes a gamma - prior distribution on the lot percent defective is considered. This sampling inspection plan is developed for finite lot sizes with matching OC curves and generated from an initial plan selected from KS A 3102 single sampling by attributes. Comparisons are made with each plan by three examples.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 춘계학술대회논문집
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• pp.529-534
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• 2005

This study performed an physical analysis on the characteristics of urban environmental sound divided into three parts depending on their features. Object sounds were classified into traffic sound, waster sound and spatial sound. Traffice sound was selected because it is dominant sound in urban environment, and water sound is selected because it generally supplies pleasantness in contrast to traffic sound, Finally spatial sound was considered because it represents sound in various places of city having lots of behaviors and types of sound due to them. Physcal analysis was carried out using sound quality indices based on Zwicker's loudness, $L_{Aeq}$(equivalent noise level), Ln(percentile noise level) and other acoutical attributes applied to previous study. Through the analysis, this study aims to compare the acoustical characteristics of urban environmental sound and to provide fundamental data for the evaluation of urban environmental sound.

• 품질경영학회지
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• 제29권2호
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• pp.120-130
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• 2001

In this paper, the QFD(quality function deployment) technique is used to acquire the quality requirements of package software which is sold in commercial software shop. To select the principal quality characteristics of package software, an user survey was conducted for a quality model developed based on the international standards and the previous research. The software user is divided into three groups: the general user, the expert, and the developer. Based on the survey results, the top 10 quality characteristics are selected including accuracy, suitability, installability, de-installability, and maturaty. Then, the QFD technique is applied to choose the software quality attributes which have strong correlation with the selected quality characteristics, some of which are traceability, accuracy, modularity, completeness, and self-descriptiveness. The developed procedure can be used in evaluating the quality of package software with lower costs and efforts.

• 소음진동
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• 제9권5호
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• pp.991-997
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• 1999

It is getting higher the demand on a good sound in a car. Like some other sensory qualities, achieving a good sound is still treated as a black-box followed by the individual taste of tuning engineers. This study aims to define the attributes of a good car audio sound and the assessment factors affecting the sound quality. With a variety of surveys on professional listening groups and car audio installers, 26 most frequently used vocabularies are selected as typical presentations of car audio sound quality. After repetitions of listening tests with deliberately selected test CD, pre-recorded 15 different digital car-recordings, headphones replay system, and three different listening groups, it is proved that there are at least 5 different assessment factors which significantly affect the car audio sound quality. They are high fidelity, spectral balance, tonal accuracy, sound stage and acoustic fault.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 1999년도 춘계학술대회 논문집
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• pp.184-188
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• 1999

The performance of an AGV varies with the applied AGV dispatching rule in the operation of AGVS. This study proposes a multi-attribute AGV dispatching rule. The suggested dispatching rule considers the output queue of a workstation, distance between an idle AGV and a workstation to be served, the input queue of the destination and the remaining job process of a part. This study suggests two types of and the remaining job process of a part. This study suggests two types of multi-attribute dispatching rules. One is an one-stage rule which selects the part to be served considering four attributes simultaneously. The other is a two-stage rule by which a workstation is selected and a part is chosen from the selected workstation. The simulation runs were executed under different experimental conditions to obtain preliminary statistics on the several performance measures.

• 산업경영시스템학회지
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• 제37권3호
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• pp.36-42
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• 2014

Domestic 105mm HE (High Explosive) shell is composed of three parts that are Fuze, Projectile and Propellants. Among three parts, propelling charge of propellants part consists of single base propellants. It has been known that the lifespan of single base propellants is affected by a storage period. These are because Nitrocellulose (NC) which is the main component of propelling gunpowder can be naturally decomposed to unstable substances similar with other nitric acid ester. Even though it cannot be prevented fundamentally from being disassembled, a decomposition product ($NO_2$, $NO_3$, and $HNO_3$) and tranquillizer DPA (Diphenylamine) having high reactivity are added into a propellant to restrain induction of automatic catalysis by a decomposition product. The decay rate of the tranquillizer is also affected by a production rate of the decomposition product of NC. Therefore, an accurate prediction of the Self-Life is required to ensure against risks such as explosion. Hereupon, this paper presents a new methodology to estimate the shelf-life of single base propellants using data of ASRP (Ammunition Stockpile Reliability Program) to domestic 105mm HE (propelling charge of propellants part). We selected four attributes that are inferred to have influence on distribution of the DPA amount in a propellant from the ASRP dataset through data mining processes. Then the selected attributes were used as independent variables in a regression analysis in order to estimate the shelf-life of single base propellants.

• 한국식품영양학회지
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• 제31권5호
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• pp.668-676
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• 2018

The purpose of this study was to investigate the quality attributes and importance that affects their satisfaction with respect to lunchboxes amongst children from low-income families in Korea. In case of $1-3^{rd}$-grade elementary school, 57.1% received lunch box through the community child center, while 45.2%, 68.5% and 80.7% of $4-6^{th}$-elementary school, middle school, and high school students received the lunch box from home, respectively. Typically, in 40.2% of all grades, the time to eat the meal was within 1~2 hours of delivery, and 34.0% consumed the lunch within 2~6 hours of delivery. With respect to intake of the contents of lunchboxes, 72.0% of the participants answered that they ate 80% of the lunchboxes delivered and 24.9% only ate 50% of the content of lunchboxes. The largest leftover were vegetables (26.9%), and the reason for leaving food was 'do not like to eat (36.1%)' followed by 'no taste (32.6%)'. Regarding improvements in delivery lunchboxes, elementary school students selected 'taste', while middle school and high school students selected 'variety of menu'. The 'nutrition (3.69 point)' of the lunchboxes was the highest satisfaction and the 'variety of menu (3.34 point)' was the lowest. In all grades, 'nutrition' and 'hygiene' were considered to be important as quality attributes of the delivery lunchboxes, and satisfaction was also high. On the other hand, in the $1-3^{rd}$-grade elementary school, 'variety of menu' and 'amount of side dish' were important but satisfaction was low. The $4-6^{th}$-grade elementary school, middle school and high school students stated that 'taste' and 'variety of menu' were important, but satisfaction was low.

• 한국조리학회지
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• 제18권4호
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• pp.15-26
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• 2012

국민소득이 증가 하면서 서양요리를 많이 접하고 와인을 함께 마시는 것이 보편화 되었다. 그러나 와인의 브랜드, 가격, 등급 등의 선택속성의 연구가 많았다. 본 연구는 호텔 서양레스토랑 메뉴선택에서 조리방법에 따라 와인선택속성을 분석하고자 서울 호텔 양식레스토랑을 고객 중심으로 표본조사를 하였다. 설문조사는 2011년 11월 01일부터 11월 30일까지 실시되었다. 표본은 177부가 최종분석 되었다. 통계패키지 프로그램을 이용하여 빈도분석, t-test, ANOVA을 실시하여 그 결과는 다음과 같다. 응답자의 특성에 따라서 와인선택속성은 성별에 따른 차이는 Grilled 요인과 Roasted 요인에 대하여 유의한 차이가 있는 것을 확인되었다. 연령에 따른 차이는 결과는 Grilled 요인과 Fried 요인에 대하여 유의한 차이가 나타났다. 가설 2에서 응답자의 특성에 따라서 이용고객 만족에는 검증한 결과 성별에 따른 이용고객의 만족 차이는 와인선택의 만족에서는 여성이 남성보다 높은 의사를 지니고 있는 것으로 분석되었다. 연령에 따라서 이용고객의 만족에서는 나이가 많을수록 전반적 만족도가 높은 것으로 응답되었다. 학력에 따라서 이용고객의 만족은 학력이 높은 수록 전반적 만족도는 강한 것으로 해석할 수 있다. 월평균 소득에 따라서 이용고객의 만족에는 1100만 원 이상 소득자들이 300만원 소득자들보다도 만족도가 강한 것으로 확인되었다.

• 한국유통학회지:유통연구
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• 제4권3호
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• pp.1-22
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• 2000

국제간 운송량 증가에 따라 복합운송주선업체 중요성은 더욱 높아가고 있으며, 특히 전자상거래 이용자의 증가에 따라 더 더욱 운송업체 또는 택배사업의 시장 활용성이 증가되고 있다. 이에 따라 한국복합운송주선업체의 경쟁력을 강화하기 위하여 복합운송업체를 이용하는 고객들인 무역업체를 대상으로 서비스 만족도 분석을 하였다. 또한 경쟁력을 분석하기 위하여 국내진출 외국 복합운송주선업체의 서비스 만족도를 비교·분석함으로써 국내업체의 경쟁력을 높이고자 했다. 분석결과에서 보면 '선적주문의 정확한 처리'는 한국주선업체가 외국인투자업체보다 열위에 있으므로 개선해야 할 점이다. 이는 운송기관과의 연계성 그리고 업무에 대한 인식부족인 경우가 많으며, 또한 '선박의 신속한 수배'에 대한 부분은 경쟁력의 갖추어져 있기 때문에 유지 및 개선하면 된다. 그리고 '저렴한 운임률의 제공' 에 있어서나 '화물집하장에서 안전한 화물취급' , '소량화물의 신속한 수배','적시 수출입 통관절차 대행정도' , '다양한 운송스케줄의 제공' 등은 중요도 높게 나타났기 때문에 고객서비스를 비용 증가를 통해서라도 개선시켜 서비스 수준을 높여야 할 부분이다. 또한 '운송관련장비를 적절하게 갖춤' , '목적지에서 하역에 관한 조언' , '선적요청(S/R)을 전자서류교환처리' , '적절한 포장방법에 관한 조언' , '해상보험에 관한 조언' , '운항스케줄을 인터넷에서 제공'등은 고객이 중요하다고 인식하고 있지 않지만, 이 부분에 대한 관심을 가져야 한다. 특히 이 부문은 운송의 직접적인 실무분야가 아니라 운송의 지원부문이며, 따라서 경쟁력은 이 부문에서 결정날 수 있기 때문에 더욱 서비스 향상을 위해 관심을 기울여야 할 부분이다.