• Journal of Korean Society of Industrial and Systems Engineering
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• 제15권25호
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• pp.23-31
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• 1992

This paper is concerned with an n jobs one machine Job shop scheduling problems in which all jobs have a common due date and unequal penalties occur when a job is completed before or after due date. The objective is to determine an optimal sequence and the corresponding common due date that yield the global minimum value of a penalty function Then a sequence that minimize the penalty function globally is a V-shaped sequence Using the idea of linear equations and a LGP(Linear Goal Programming), this paper shows that LGP and MAD(Mean Absolute Deviation) are equivalent problems. Therefore an efficient algorithm that is developed for MAD problem holds for LGP problem and vice-versa. A numerical example to account for the algorithm is provided.

• Journal of applied mathematics & informatics
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• 제18권1_2호
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• pp.383-391
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• 2005

The paper is devoted to some flow shop scheduling problems, where job processing times are defined by functions dependent on their positions in the schedule. An example is constructed to show that the classical Johnson's rule is not the optimal solution for two different models of the two-machine flow shop scheduling to minimize makespan. In order to solve the makespan minimization problem in the two-machine flow shop scheduling, we suggest Johnson's rule as a heuristic algorithm, for which the worst-case bound is calculated. We find polynomial time solutions to some special cases of the considered problems for the following optimization criteria: the weighted sum of completion times and maximum lateness. Some furthermore extensions of the problems are also shown.

• Journal of Fashion Business
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• 제19권4호
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• pp.75-91
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• 2015

There is an increased interest in having beauty regardless of ages and sex with improvement of the national income level and increase in social activities. Competition within the beauty service industry is increasing rapidly because of global impact within Korea wave. Thus, active public relations and offering distinguished service in the beauty service industry are important. Also, uniforms play an important role in providing an image differentiated from other brands and presents professionalism to the customer. Therefore, we determined function and design of uniforms required in beauty service industry by researching wearing realities, satisfaction, preferred designs and functions of uniforms from hair shop staff. Functional and aesthetic uniforms play an important role to enhance the staffs' sense of belonging. In addition, it is good for the image of hair shop. Special design mirroring job characteristics with expression of differentiated personalities is needed. However, the research was conducted only in the hair shop in Seoul, Daejeon, and Gyeonggi-do. Further studies on much wider areas will be needed.

• Journal of Korean Society of Industrial and Systems Engineering
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• 제23권56호
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• pp.9-18
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• 2000

This paper considers the problem of two-machine, M-parallel flow shop scheduling to minimize makespan, and proposes a series of heuristic algorithms and a branch and bound algorithm. Two processing times of each job at two machines on each line are identical on any line. Since each flow-shop line consists of two machines, Johnson's sequence is optimal for each flow-shop line. Heuristic algorithms are developed in this paper by combining a "list scheduling" method and a "local search with global evaluation" method. Numerical experiments show that the proposed heuristics can efficiently give optimal or near-optimal schedules with high accuracy. with high accuracy.

• The Korean Journal of Franchise Management
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• 제12권3호
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• pp.7-19
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• 2021

Purpose: The hotel industry needs a leader who can actively demonstrate leadership to respond to and accept changes in the organization in a highly competitive and fast-changing environment. Therefore, the role of leaders who instill clear vision and goals of the organization in their members, listen to their opinions, and empathize is paramount. Leaders should encourage successful organizational activities based on active participation by employees and create the best environment for working with a sense of mission and responsibility. This study aims to identify the relationship between empathy leadership and job engagement as a result variable of team cohesion in the hotel culinary department and conduct empirical studies on the role of empathy leadership and job engagement. Research design, data, and methodology: The data were collected from employees who work in culinary department at a five-star franchise hotel located in the Seoul metropolitan area. Because it is difficult to conduct a survey through face-to-face contact with employees due to the COVID-19 pandemic, the online survey was conducted from February 1 to February 28, 2020. A total of 330 questionnaires through online were distributed and 268 employees completed the survey, yielding a response rate of 81%. Of the 268 returned responses, 27 responses were not usable due to missing information. Thus, a total of 241 responses were used for analysis. Results: The study results are as follows. First, it has been shown that the empathy leadership of culinary department in hotel companies has a significant positive impact on the job engagement. Second, it has been shown that job engagement has a significant positive effect on members' team cohesiveness. Third, empathy leadership of hotel companies' culinary department has a significant positive impact on members' team cohesiveness. Fourth, job engagement has a significant positive (+) mediating effect in the relationship between empathy leadership and team cohesiveness in culinary department. Conclusion: This study supports the theory that an emotional and empathic leader's behavior or ability can change the effectiveness or atmosphere of a rapidly changing hotel culinary team organization by presenting a research model on the effect of empathic leadership on job engagement and team cohesiveness. And hotel chefs should be more aware of the importance of empathic leadership and make them a human resource of the organization through formal and informal communication with culinary employees.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 한국경영과학회/대한산업공학회 1999년도 춘계공동학술대회:정보화시대의 지식경영
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• pp.420-420
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• 1999

• Journal of Fashion Business
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• 제20권1호
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• pp.69-81
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• 2016

In this study investigated the effect of emotional labor, emotional exhaustion, and depression on the job-related attitudes. Sample subjects used in this study were salespeople of a fashion shop in Jeollabukdo and Jeollanamdo. Questionnaire data from 160 fashion shop salespeople were analyzed through a reliability analysis, factor analysis, and multiple regression analysis. The results of the study were as follows. First, emotional labor of salespeople was divided into 2 factors, surface acting and deep acting. Second, emotional labor had a significant influence on the emotional exhaustion and depression. Third, the surface acting of emotional labor had a positive influence on the emotional exhaustion and depression; whereas, the deep acting of emotional labor had a negative influence on the emotional exhaustion and depression. Fourth, the surface acting of emotional labor, emotional exhaustion, and depression had a negative influence on job involvement; in addition, the deep acting of emotional labor had a positive influence on job involvement. Fifth, the surface acting of emotional labor, emotional exhaustion, and depression had a positive influence on turnover intention; in addition, the deep acting of emotional labor had a negative influence on turnover intention.

• Journal of Fashion Business
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• 제10권5호
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• pp.74-92
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• 2006

This study aims at revitalization of industrial consignment education and focuses on the development of preferred subjects and teaching methods. The survey was administered to six hundred workers for the local fashion distribution companies for two years between through interview and questionnaire with 13 questions: 3 of them about favorite subjects, 7 about teaching methods, and the rest about whether or not they want to enter a college as well as which certificates and which kinds of job they want to have. The results of the survey can be summarized as follows. 1 The respondents in 2005 who answered to the questions about fashion design and other major subjects show that they preferred the subjects on fashion design to the subject of make-up and that they were interested in the photo-shop subject while they were less interested in the fashion marketing subject. 2 In order to apply what they learn to their own work field, the respondents want practical-work oriented lectures rather than theory centered ones. It means the new teaching program needs the teaching staffs who have had some practical work experiences and majored in the same subjects as the respondents prefer to learn. So it is necessary to take it into consideration that the development of new curriculums should focus on the subjects of practical skill and the experiences of actual work fields. 3 The certificate of 'shop-master' qualification is considered as the most interesting and necessary thing for their job. The respondents show that they are most concerned in a shop-master, manager of a department at department stores related to fashion distribution companies. Therefore, it points out the intensive teaching program for getting the qualification of shop-master is a must in the industrial consignment education.

• Human Ecology Research
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• 제56권1호
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• pp.71-84
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• 2018

This study presents a case of a visual merchandising course adopting a problem-based learning (PBL) model, as a part of shop manager training program for high school students. Various vocational training classes are actively developed for vocational high schools, yet programs in the home economics area are relatively lacking. In particular, education programs for shop manager training are urgently required due to the high demand of this job in the fashion industry. The PBL model, which reflects constructionist learning theory, is considered for this visual merchandising course in order to help develop the ability of students to creatively apply their knowledge on real-world problems through self-driven learning. For the purpose of job analysis, two problem areas were identified through interviews conducted with shop managers who work for apparel shops in department stores. Based on the results of the interviews, professors and high school teachers developed two PBL instructional modules. The developed module courses were implemented with 2 classes of vocational high school students. The learning outcome was examined through the analysis of a student survey and reflection journals. It was apparent that the PBL courses effectively attracted the interests of learners in vocational training and improved their understanding of the contents as well as cooperation skills. The results of this study indicate that implementing the PBL model for the training of store managers can contribute to the vocational training programs for high school students.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 대한산업공학회/한국경영과학회 2000년도 춘계공동학술대회 논문집
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• pp.183-187
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• 2000

In this study, we design a scheduling system for painting shop, called HYPOS(Hyundai heavy industry Painting shop Operating System) and develop a system implementing the design. The painting shop operations are currently scheduled manually by experts. Manual scheduling is a serious time consuming job and generally can not guarantee a full optimality. Building a traditional heuristic scheduling system lot this problem, however, is not promising because there are various kinds of constraints to be satisfied including space allocation of shipbuilding blocks in a painting cell. We, therefore, adopt a spatial scheduling approach and develop scheduling algorithms based on field-oriented scheduling heuristics and computational geometry. And we show that the algorithms can successfully be applied to the painting shop scheduling problem.