• Industrial Engineering and Management Systems
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• v.13 no.2
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• pp.203-209
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• 2014

This research designed and implemented a supply chain risk management platform and applied it to a case study of reduced-fat Lanna pork sausage as a new product development project. The proposed framework has three stages: risk identification, risk assessment, and risk mitigation. Seventeen risk agents with 17 risk events were identified based on SWOT analysis and the Porter Five Forces concept through the process of planning, sourcing, making and delivering, partially captured from the supply chain operations reference model in the first stage. In the second stage, an house of risk (HOR) framework was applied to present the impacts of each risk agent. In the third stage, eight risk agents with high impact were selected to design 21 preventive actions. Finally, three preventive actions with the highest effectiveness to difficulty ratio scores-'sales evaluation of familiar products', 'increasing distribution channels and promotions to improve sales', and 'work flow improvement for work safety'-were then recommended for this new product development.

• Journal of Distribution Science
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• v.17 no.2
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• pp.101-107
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• 2019

Purpose - The purpose of this study is to analyze the user requirements and developer requirements in virtual reality(VR), and suggest ways to increase the satisfaction of users who experience virtual reality. Specifically, focused on experience store of VR as a distribution retailer, user requirements were analyzed according to the results of previous research that the characteristics of Affordance, Presence, and Head Mounted Display (HMD) affect user satisfaction. Research, design, data, and methodology - Based on previous studies, in this study, we analyzed the importance of immerse, interaction, perception, and presence for the satisfaction of the user through the questionnaire, and the user experiences virtual reality (VR) The importance of HMD, Presence, Affordance, and experience satisfaction were analyzed. Based on this, we analyzed the user requirements and the developer requirements based on the questionnaires and interviews of the experts, starting from the user's desire or preference using QFD technique. Results - As a result of the analysis, the development factors that occupied a big part in the virtual reality field appeared to be visual. In detail, this showed that there was a lack of sense of presence for users. This should be improved. This paper shows that the requirements for visual, auditory, and tactile development are necessary. For the satisfaction of the users of virtual reality (VR) users, it is necessary to develop them according to their priority in consideration of importance and difficulty in the future. Conclusions - In this study, it was suggested that development according to priority should be considered, considering the difficulty level. Based on the results of this study, the following suggestions are made. First, we tried to search the list of user requirements as much as possible, but it is likely to change due to the development of VR technology. Therefore, it is necessary for developers to continually supplement user requirements with recent research literature. Second, development priorities according to difficulty level should be considered. This aspect should be considered in the actual VR development process, so if the numerical value of the difficulty is calculated, it should be presented in the research.

• Archives of Craniofacial Surgery
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• v.18 no.2
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• pp.97-104
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• 2017

Background: Nasal bone fracture is one of the most common facial bone fracture types, and the surgical results exert a strong influence on the facial contour and patient satisfaction. Preventing secondary deformity and restoring the original bone state are the major goals of surgeons managing nasal bone fracture patients. In this study, a treatment algorithm was established by applying the modified open reduction technique and postoperative care for several years. Methods: This article is a retrospective chart review of 417 patients who had been received surgical treatment from 2014 to 2015. Using prepared questionnaires and visual analogue scale, several components (postoperative nasal contour; degree of pain; minor complications like dry mouth, sleep disturbance, swallowing difficulty, conversation difficulty, and headache; and degree of patient satisfaction) were evaluated. Results: The average scores for the postoperative nasal contour given by three experts, and the degree of patient satisfaction, were within the "satisfied" (4) to "very satisfied" (5) range (4.5, 4.6, 4.5, and 4.2, respectively). The postoperative degree of pain was sufficiently low that the patients needed only the minimum dose of painkiller. The scores for the minor complications (dry mouth, sleep disturbance, swallowing difficulty, conversation difficulty, headache) were relatively low (36.4, 40.8, 65.2, 32.3, and 34 out of the maximum score of 100, respectively). Conclusion: Satisfactory results were obtained through the algorithm-oriented management of nasal bone fracture. The degree of postoperative pain and minor complications were considerably low, and the degree of satisfaction with the nasal contour was high.

• Journal of the Korea Safety Management & Science
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• v.14 no.3
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• pp.151-158
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• 2012

The objective of this paper is to propose a method of how to perform risk assessment in the early stage of defense research and development for the acquisition of weapon systems. An advanced method for risk assessment and its associated objective functions are developed first based on the concept of systems engineering. The developed method is then applied to carry out the analysis of alternatives in the trade-off environments. As a case study, the multi-purpose training ship is considered, where it is performed using the notions of technology readiness levels, degrees of difficulty, and technology need values to facilitate design space visualization and decision maker interaction. It is noted that decision makers can benefit from our approach as an improved risk assessment method in the context of multi-criteria decision making.

• Journal of Korean Society for Quality Management
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• v.28 no.3
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• pp.124-132
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• 2000

A selected subject and a standardized scoring system were newly enforced at college entrance examination from 1999. A selected subject system means each student can select one subject in addition to common subject in the field of mathematical research II and a standardized scoring system means we standardize the score of each field as mean 50 and standard deviation 10 in order to adjust the degree of difficulty between fields. In the field of mathematical research II, there may exist not only difference of the degree of difficulty but also that of general studying ability between groups of selected subjects. So when we standardize score, we have to consider them. So far a linear equating which is a parametric method and an equi-percentile equating which is a nonparametric method have been published, but both of them supposed that the general studying ability between groups was equal. So in this paper an adjusted linear and percentile equating method which seems to be adequate to our entrance examination is suggested and is investigated by computer simulation.

• Journal of Information Technology Applications and Management
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• v.17 no.1
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• pp.127-139
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• 2010

Customer behavior pattern discovery is the fundament for conducting customer oriented services and the services management. But, the composition, need, interest and experience of customers may be continuously changing, thereof lead to the difficulty in refining a stable description of their consistent behavior pattern. This paper presented a new method for the behavior pattern discovery from a changing collection of customers. It was originally inspired from the swarm intelligence of ant colony. By the adaptive clustering, some typical behavior patterns which reflect the characteristics of related customer clusters can extracted dynamically and adaptively.

• Journal of Families and Better Life
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• v.26 no.1
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• pp.85-93
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• 2008

The purpose of this study is to investigate the Korean's value of children and perception of parenting difficulty through the agreement to the three kinds of Korean proverbs: difficulty of parenting, preference of son and value of daughter. Also, this study attempted to identify whether the value of children and the perceived difficulty of parenting measured by the agreement of the proverb is related to the number of children they thought as ideal before marriage and the number of children they actually have. Total 385 married men and women who have a job participated in the survey. Main result is as follows. 1) In most cases, the ideal number of children was at least equal or more than the actual number of children. 2) The subjects showed higher degree of agreement to the proverbs regarding the difficulty of parenting than the preference of son or the value of daughter. 3) The degree of agreement to each kind of proverbs were different in terms of some demographic variables such as age and sex. 4) When the age effect controlled, the ideal number of son had correlation with the agreement to the son-preference proverbs while the ideal number of daughter or total children had no correlation with agreement to any kinds of proverb. The actual number of son was positively correlated with agreement to the son-preference proverbs while actual number of daughter was negatively correlated with it. In conclusion, this study suggests the Korean's value of children has been rapidly changing and it has, in part, an effect on the number of children they want to have or they actually have.

• Journal of Society of Preventive Korean Medicine
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• v.17 no.3
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• pp.75-89
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• 2013

Objective : The purpose of this study was to investigate the effects of yoga program on depression, quality of life, and difficulty of daily activities in community elders. Methods : A Nonequivalent control group pretest-posttest design was used for this study. Elderly people who agreed to participated in the study were assigned to a experimental group(n=17) or a control group(n=17). The yoga program conducted 90minutes, 2times a week for 1 year. Study outcomes were measured by structured questionnaires from March, 2012 to Feb., 2013. For data analysis, Chi-square test, t-test, and Mann-Whitney U test were performed using SPSS version 17.0. Results : Depression was not significant difference between the two groups in pretest and posttest. But there was significant differences between the two groups in quality of life (t=3.984, p<.001), and difficulty of daily activities (t=-3.083, p=.004). Therefore, the experimental group showed significant improvement in quality of life and reduce difficulty of daily activities. Conclusion : The yoga program was effective in increasing quality of life and decreasing difficulty of daily activities in community elders. When developing exercise program to improve health in older adults, it is important to consider physical exercise plus general health management.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.40 no.1
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• pp.1-10
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• 2017

The difficulties in opening and closing a sport utility vehicle (SUV) tailgate is important aspect of JD (James David) power's Initial Quality Survey (IQS) assessment, and affective quality has a big impact on the the success of thesedays products. The purpose of this study is to evaluate the perceived difficulty and satisfaction of customers by the opening and closing of the tailgate and to grasp the relationship between them and the opening and closing reaction force. The mechanical force required to open and close 42 domestic and overseas SUV tailgates was measured with the help of an auto company. In the experiment, 100 male drivers in their 20s to 50s evaluated perceived difficulty and satisfaction with opening and closing the tailgate. The results of the analysis showed that perceived difficulty and satisfaction were statistically different depending on the vehicle, but did not depend on the personal characteristics of the participants. The perceived difficulty and satisfaction regression model of tailgate opening and closing was developed by mechanical force variables and had a relatively high adjusted $R^2$ ranging from 0.62 to 0.73. The models showed that the the initial close and open force, the difference between initial and maximum close force and the difference between initial and auto-fall angle should be small for the low perceived exertion and high satisfaction. In addition, the correlation analysis between IQS score of tailages and perceived difficulty and satisfaction showed that the IQS scores were more related to the perceived difficulty and satisfaction of closing than those of opening. The results of the study will be helpful to design and test mechanical open and close structure of SUV tailgates.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.16 no.2
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• pp.232-241
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• 2009

Purpose: The purpose of this study was to analyze the importance, difficulty, and frequency of work (duties and tasks) done by nurses' in Outpatient Departments (OPD). Method: Data were collected using structured questionnaires, which included 11 duties and 92 tasks making up the OPD nurse's job. Questionnaires were completed by 286 nurses. Each duty and task was analyzed for importance, difficulty, and frequency (range 1-3). Results: The mean score for importance was $2.58{\pm}0.29$, for difficulty, $2.11{\pm}0.31$, and for frequency, $2.18{\pm}0.31$. OPD nurses recognized 'patient education and consultation' as important and difficult. However, in practice OPD nurses reported the most frequent task as 'support for medical services'. There was a significant difference in importance and difficulty of duties according to OPD nurses' university degree (F=3.693, p=.026; F=4.089, p=.018) and hospital size (F=4.274, p=.006; F=3.154, p=.025). However there were no differences in importance, difficulty, or frequency according to clinical experience in OPD. Conclusion: The findings indicate that OPD nurses must be able to do important and difficult duties and tasks, especially patient education and consultation. To have time for these uniquely nursing tasks, OPD nurses need to delegate 'preparation for medical service', and 'management of facility and environment' to nonmedical health-care workers.