• 제목/요약/키워드: Average Quality

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수정된 Kano 모델을 이용한 프로젝트의 위험요인 연구 (Analysis of the Project Risk Factors Using Modified Kano Model)

  • 장덕재;송해근;박영택
    • 품질경영학회지
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    • 제41권2호
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    • pp.221-232
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    • 2013
  • Purpose: This paper examines risk factors which affect project success, and proposes a method utilizing the average potential satisfaction index(API) to evaluate how much the satisfaction level of the personnel involved in the project can change by reducing the risk. Methods: The current study derives 11 risk factors affecting project success from literature review and conducts survey of 253 subjects who have project work experience. A modified Kano's questionnaire using 5-point Likert-scale is applied to investigate the amount of satisfaction or dissatisfaction when the risk factors are reducted or not, respectively. Results: The respondents consider that the risk factors which include the three elements of project management(schedule, quality, cost) is more important than other risk factors related to the project environment, and technology and profitability. Conclusion: The average potential satisfaction index proposed in this study can measure the perception on the risk factors of the personnel involved in the project, since it has a strong correlation with the perceived importance by the respondents in this study.

중년기 성인의 우울, 피로와 삶의 질 간의 관련성 - 진주지역을 중심으로 - (The Relationship of Depression, Fatigue and Quality of Life in Middle-Aged Adults)

  • 최원희
    • 보건의료산업학회지
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    • 제6권2호
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    • pp.91-99
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    • 2012
  • The aims of this study were to investigate the relationship of depression, fatigue and quality of life (QOL) in middle-aged adults in Jinju city. This survey was conducted from October to November, 2010 and 230 responses from the survey were used. The data was analyzed by descriptive statistics, t-test, ANOVA, Pearson correlation, and stepwise multiple regression. The average score of the participants' depression was $13.16{\pm}8.26$ out of 60. the average fatigue score was $21.46{\pm}4.79$ out of 44. The average QOL score was $85.90{\pm}9.49$ out of 130. Among general characteristic of the participants level of QOL was statistically significant for gender, educational level, exercise. There was a significantly corrleation among depression, fatigue and QOL. The results revealed that depression, educational level, exercise were the significant predictors to affect the QOL in middle-aged adults. Low level of depression, higher educational background, and active exercise were closely correlated with QOL. To improve QOL in middle-aged adulthoods for the community, the programs which include lowering depression, encouraging exercise should be designed.

Switching properties of bivariate Shewhart control charts for monitoring the covariance matrix

  • Gwon, Hyeon Jin;Cho, Gyo-Young
    • Journal of the Korean Data and Information Science Society
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    • 제26권6호
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    • pp.1593-1600
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    • 2015
  • A control chart is very useful in monitoring various production process. There are many situations in which the simultaneous control of two or more related quality variables is necessary. We construct bivariate Shewhart control charts based on the trace of the product of the estimated variance-covariance matrix and the inverse of the in-control matrix and investigate the properties of bivariate Shewart control charts with VSI procedure for monitoring covariance matrix in term of ATS (Average time to signal) and ANSW (Average number of switch) and probability of switch, ASI (Average sampling interval). Numerical results show that ATS is smaller than ARL. From examining the properties of switching in changing covariances and variances in ${\Sigma}$, ANSW values show that it does not switch frequently and does not matter to use VSI procedure.

외식업체에서 제공되는 음식 및 서비스 품질에 대한 고객의 기대도와 만족도에 관한 연구 (A Study on the Customers' Expectation & Satisfaction for Food and Service Quality in Restaurants)

  • 조소영;류시현;김혜영
    • 한국식생활문화학회지
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    • 제16권4호
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    • pp.330-340
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    • 2001
  • This study is to select food offered with higher frequency at restaurants such as hamburger, pizza, chicken, gimbap(boiled rice rolled in laver with seasonings stuffed), and calgooksu(Korean traditional noodles); identify customers' expectation and satisfaction levels on food and service quality and analyze correlation according to each food. The survey was conducted from March 1 to March 24, 2000, by distributing questionnaires. Statistical data analysis was completed using SPSS for t-test, ANOVA, Pearson's correlation analysis. The results of this study were as follows: 1) It is revealed that overall average satisfaction levels on food quality according to individuals' trait came out significantly low compared to their expectation levels, and that balance in nutrition and reasonable prices had problems in relation to food quality. 2) Customers' expectation levels on food quality came out the highest with calgooksu and gimbap, and their satisfaction levels came out the highest with pizza. 3) Customers' overall average expectation levels on service quality showed a very high point, while their satisfaction levels showed a low point with significance. 4) Hamburger was poor in hygiene; pizza showed the highest satisfaction levels over its quality with significance, and calgooksu and gimbap showed very low satisfaction levels over their service quality. 5) Correlation between customers' expectation and satisfaction levels over the nutritional balance and proper taste of the food quality came out significant. 6) Pizza and chicken showed significant correlation with regard to atmosphere, service, and hygiene variables (p<0.01).

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Prediction of pollution loads in agricultural reservoirs using LSTM algorithm: case study of reservoirs in Nonsan City

  • Heesung Lim;Hyunuk An;Gyeongsuk Choi;Jaenam Lee;Jongwon Do
    • 농업과학연구
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    • 제49권2호
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    • pp.193-202
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    • 2022
  • The recurrent neural network (RNN) algorithm has been widely used in water-related research areas, such as water level predictions and water quality predictions, due to its excellent time series learning capabilities. However, studies on water quality predictions using RNN algorithms are limited because of the scarcity of water quality data. Therefore, most previous studies related to water quality predictions were based on monthly predictions. In this study, the quality of the water in a reservoir in Nonsan, Chungcheongnam-do Republic of Korea was predicted using the RNN-LSTM algorithm. The study was conducted after constructing data that could then be, linearly interpolated as daily data. In this study, we attempt to predict the water quality on the 7th, 15th, 30th, 45th and 60th days instead of making daily predictions of water quality factors. For daily predictions, linear interpolated daily water quality data and daily weather data (rainfall, average temperature, and average wind speed) were used. The results of predicting water quality concentrations (chemical oxygen demand [COD], dissolved oxygen [DO], suspended solid [SS], total nitrogen [T-N], total phosphorus [TP]) through the LSTM algorithm indicated that the predictive value was high on the 7th and 15th days. In the 30th day predictions, the COD and DO items showed R2 that exceeded 0.6 at all points, whereas the SS, T-N, and T-P items showed differences depending on the factor being assessed. In the 45th day predictions, it was found that the accuracy of all water quality predictions except for the DO item was sharply lowered.

Modified n-Level Skip-Lot Sampling Inspection Plans

  • Cho, Gyo-Young
    • Journal of the Korean Data and Information Science Society
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    • 제19권3호
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    • pp.811-818
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    • 2008
  • This paper is the generalization of the modified two-level skip-lot sampling plan(MTSkSP2) to n-level. The general formulas of the operating characteristic(OC) function, average sample number(ASN) and average outgoing quality(AOQ) for the plan are derived using Markov chain properties.

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완도지역 성인 및 노인의 영양소 섭취 실태조사 (A Study on Nutritional Intakes in Elderly People in Wando Area)

  • 차복경
    • 대한지역사회영양학회지
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    • 제10권6호
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    • pp.880-891
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    • 2005
  • The purpose of this study was to investigate nutrients intakes and nutritional quality of Adults and Elderly People in an island area (Wando). A three-day dietary intakes survey, using a 24 hour recall method was obtained from 187 subjects aged 46 to 84 (mean age 65.3) living in an island area (Wando). Nutient intakes were analyzed using CAN-Pro soft program and compared to Korean RDA. The quality of nutrients was assessed by analyzing nutrient adequacy ratio (NAR), mean adequacy ratio (MAR), and index of nutritional quality (INQ). The average daily mean energy intakes were 1869.0 kcal for males and 1943.9 kcal for females, respectively. Daily intakes of protein for males and females were 28.0 and 30.4 g and those of fat were 31.5 and 28.51 g, respectively. Nutrient consumed below $75\%$ of Korean RDA was protein, vitamin A, Ca and Zn in both males and females. Average CPF ratio of males and females were 78.8 : 6.0 : 15.1 and 80.0 : 6.4 13.4, respectively. Energy intake ratio from protein was significantly higher in over 60 years males. Carbohydrate dependency decreased with age. Protein dependency increased with age. Nutrient adequacy ratio (NAR) of energy, protein vitamin A and vitamin E were increased with age in males. The mean adequacy ratio (MAR), an index of overall dietary quality, were not significantly different by age group. Average MAR for males and females was 0.77 and 0.78, respectively. The index of nutritional quality (INQ) showed the tendency to decrease with age. Especially, there were significantly decreases in INQ of all nutrients, except protein, with age. Based on these results, it is evident that people in the island area did not consume enough nutrients. Specially, dietary intake of protein, vitamin A, vitamin E, and Ca were not adequate. (Korean J Community Nutrition 10(6) : $880\∼891$, 2005)

Analysis of Paddy Soil Chemical Properties and Rice Quality in Central Area (Sejong) in Korea

  • Choi, Nag-Gor;Park, Jong-Hyun;Kang, Seong-Soo
    • 한국토양비료학회지
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    • 제51권1호
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    • pp.61-70
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    • 2018
  • This study was carried out to review and compare crop cultivations upon chemical properties of paddy soil and qualitative characteristics of rice in Sejong-city from a point of view of farming extension to rice farmers and to utilize the result of the study as a basic guideline for precise agricultural practice. The pH in soils of Sejong was about 6.1-6.6 and had no difference with an average pH of paddy soils in Chung-Nam with pH 6.1. However, the average of organic matter, calcium (Ca) and available silicate in Sejong was lower than the average of them in Chung-Nam. The yields of rice were higher in 2010 than in 2011 and 2012, and the protein contents of rice were the highest in 2011 while the lowest water contents of rice in 2011. The protein contents upon regions were the highest in 2011 with 6.1%, and the amylose contents were the highest in Yeondong-myun, Jeoneu-myun, and Yeonseo-myun in 2010 while Kumnam-myun and Jeondong-myun were the highest in 2012. With the increase of precipitation, the protein content level in rice was increased while the amylose content level tended to decrease. Correlations between the chemical properties of paddy soil and the quality of rice and between level of organic matter in soil and amylose contents were negative (r = -0.507), and the correlation between the moisture contents and amylose contents (r = 0.419) and between the water contents and whiteness (r = 0.485) were positive. Because the quantity and quality of rice yield is determined by the soil characteristics, the consultation to farmers for the proactive soil analysis and for the maintenance of stable level of pH, organic matter and available silicate based on historical results of analysis is highly recommended. Also, the analysis on the effect of the weather and the soil characteristics affecting the quality and quantity of rice would be another good way.

SWAT 모형의 유출해석모듈 개선이 수질모의에 미치는 영향 (Effect of Improved Runoff Module in SWAT on Water Quality Simulation)

  • 김남원;신아현;이정우
    • 한국수자원학회논문집
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    • 제42권4호
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    • pp.297-307
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    • 2009
  • 신뢰도 높은 수질 모의를 위해서는 유역 내 정확한 유출 모의가 반드시 선행되어야 한다. 본 연구에서는 연속방정식과 운동파 근사에 의한 Manning의 식이 결합된 비선형 저류방정식에 근거한 하도추적법과 금일 강수량을 고려하여 시간적으로 가중 평균된 유출곡선지수를 산정하도록 개선된 지표유출계산 모듈이 수질 모의에 미치는 영향을 분석하였다. 이를 대표적 준분포형 모형인 SWAT에 탑재하여 충주댐 유역에 적용하여 각 개선모듈별 독립적인 분석과 전체 개선의 효과를 개선 전 후로 분석하였다. 각 개선 모듈별 수질 모의의 기여도를 분석한 결과 지표유출계산 모듈의 개선보다는 하도추적의 개선이 더 많은 영향을 미치는 것으로 분석되었다. 이는 비점오염원의 특성 상 하도추적의 개선으로 인한 유출 지체 현상의 개선이 부하량의 배출에 가장 큰 요인으로 작용하였기 때문이라고 판단된다.

다가구주택 반지하세대의 실내공기질 실태 및 영향요인 분석 (An analysis of the Influencing Factors and Actual State of Indoor Air Quality in Semi-underground Multi-family Housing Units)

  • 최윤정;김선영;김지영;최솔지
    • 한국생활과학회지
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    • 제20권5호
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    • pp.1075-1091
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    • 2011
  • The purposes of this study were to investigate the actual state of indoor air quality in semi-underground multi-family housing units in early summer, to analyze the influencing factors, and to make suggestions for improvement. A series of field investigations were conducted in four target units between June 22, 2010, and June 28, 2010. The field investigations included measurements of indoor air quality as well as the observation of architectural characteristics and living conditions. In addition to the field investigation, on-site questionnaire surveys were administrated to residents in 90 units. The findings are summarized as follows: (1) The average $CO_2$ levels in each of the four units ranged from 759ppm to 1885ppm. $CO_2$ levels in three units exceeded the evaluation standard (1000ppm), and one unit was lower than the standard. This unit had smaller number of staying person and a large amount of ventilation than others; (2) the average CO levels in each unit were almost 0ppm, but 0.1~1.1 levels of CO were revealed at several times; (3) the average PM-10 levels ranged from $8{\mu}g/m^3$ to $40{\mu}g/m^3$, which distributes within the standard ($150{\mu}g/m^3$). The influencing factors of PM-10 levels were analyzed as inflow from outside, the use of a gas range, and the residents' activities; (4) therefore, it was evaluated to be necessary to improve ventilation for the indoor air quality of semi-underground housing in aspect of $CO_2$ levels.