• Journal of Korean Society of Industrial and Systems Engineering
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• v.27 no.2
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• pp.68-77
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• 2004

This paper considers the workforce assignment problem to minimize both the deviations of workloads assigned to workers and to maximize the total preference between each worker and each machine. Because of the high expense of technology education and the difficulties of firing employees, there is no part time workers in semiconductor industry. Therefore, multi-skilled workers are trained for performing various operations in several machines. The bicriteria workforce assignment problem in this paper is not easy to obtain the optimal solution considering the aisle structure and it is belong to NP-class. The proposed heuristic algorithms are developed based on the combination of spacefilling curve technique, simulated annealing technique and graph theory focusing on the multiple-row machine layout. Examples are presented for the proposed algorithms how to find a good solution.

• 대한공업교육학회지
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• v.43 no.2
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• pp.61-78
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• 2018

The purposes of this study are to importance and performance of performance goal of workforce training project of SMB Specialized Vocational High Schools by existence of teaching staff's assignment and compare difference of the priority for performance goal of two groups by IPA. Research problems for them are as follows. First, how about differences of the importance for performance goal of workforce training project of SMB Specialized Vocational High Schools by existence of teaching staff's assignment? Second, how about differences of the performance for performance goal of workforce training project of SMB Specialized Vocational High Schools by existence of teaching staff's assignment? Third, how about differences of the priority for performance goal of workforce training project of SMB Specialized Vocational High Schools by existence of teaching staff's assignment? Results obtained by this study are as follows. First, performance goal of workforce training project of SMB Specialized Vocational High Schools that teaching staffs recognize the most importantly regardless of the existence of assignment was 'improvement of students' adaptation to the filed' in area of 'employment competency strengthening'. Second, performance goal of workforce training project of SMB Specialized Vocational High Schools that teaching staffs recognize the degree of high performance regardless of the existence of assignment was 'expansion of SMB employment opportunity' in area of 'employment connection'. Third, regardless of the existence of teaching staff's assignment, areas of high priority in performance goal of workforce training project of SMB Specialized Vocational High Schools were 'improvement of teaching staff's understanding for SMB' and 'improvement of SMB understanding for Specialized Vocational High School' in area of 'improvement of SMB mind for Specialized Vocational high School'.

• Journal of the Korean Operations Research and Management Science Society
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• v.40 no.4
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• pp.145-156
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• 2015

Incorporation of individual learning and forgetting behaviors within worker-task assignment models produces a mixed integer nonlinear program (MINLP) problem, which is difficult to solve as a NP hard due to its nonlinearity in the objective function. Previous studies commonly assume homogeneity among workers in workforce scheduling that takes account of learning and forgetting characteristics. This paper expands previous researches by considering heterogeneous individual learning/forgetting, and investigates the impact of worker heterogeneity in initial expertise, steady-state productivity, learning and forgetting on system performance to assist manager's decision-making in worker-task assignments without tackling complex MINLP models. In order to understand the performance implications of workforce heterogeneity, this paper examines analytically how heterogeneity in each of the four parameters of the exponential learning and forgetting (L/F) model affects system performance in three cases : consecutive assignments with no break, n breaks of s-length each, and total b break-periods occurred over T periods. The study presents the direction of change in worker performance under different assignment schedules as the variance in initial expertise, steady-state productivity, learning or forgetting increases. Thus, it implies whether having more heterogenous workforce in terms of each of four parameters in the L/F model is desired or not in different schedules from the perspective of system productivity measurement.

• Journal of the Korean Operations Research and Management Science Society
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• v.23 no.2
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• pp.83-101
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• 1998

Assembly U-lines are increasingly accepted in industry, especially just-in-time production systems, for the efficient utilization of workforce. In this paper, we present an integer programming formulation and a branch-and-bound method for balancing the U-line with the objective of minimizing the number of workstations with a fixed cycle time. In the mathematical model, we provide the method that can reduce the number of variables and constraints. The proposed branch-and-bound method searches the optimal solution based on a depth-first-search. To efficiently search for the optimal solutions to the problems, an assignment rule is used in the method. Bounding strategies and dominance rules are also utilized. Some problems require a large amount of computation time to find the optimal solutions. For this reason. some heuristic fathoming rules are also proposed. Extensive experiments with test-bed problems in the literature are carried out to show the performance of the proposed method. The computational results show that our method is promising in solution quality.

• Journal of the Korean Society for Library and Information Science
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• v.49 no.2
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• pp.275-290
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• 2015

Cooperation between school libraries and public libraries is one of strategies to use the libraries'resources effectively and foster an educational role of librarians by providing good services to children and young adults. According to analysis results of the questionnaire on their cooperation, they sympathize necessary of cooperation between school libraries and public libraries and consider programs and materials as the most necessary part of mutual cooperation. They recognize that lack of awareness and attention obstructs their coordination in common. The teacher librarians promote the programs and services for children and young people of the public libraries, the public librarians also introduce their programs to the school libraries and discuss purchasing and providing educational materials with the teacher librarians. Finally, they assist that assignment of professional workforce and network operation are necessary to improve inter library collaboration.

• The Korean Journal of Archival Studies
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• no.62
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• pp.77-107
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• 2019

There have been constant requests for urgently recruiting professionals in the archives to establish archival management systems by reflecting public institutional feature as well as reinforcing expertise and independence of them. However, it is true that some even adequate professional manpower haven't been secured at each level of public institutions due to ambiguous standards for the placement of professionals in the field of records management followed by the current [Public Records Management Act]. Thereupon, this study is to create records management task model for the archival management institutions with the workload of records management induced by the model, and to present reasonable scale of workforce to deal with the assignment. Moreover, here is shown which professional staff should be allocated for better efficiency and systems to carry out the task of records management in each relevant institution.

• Journal of the Korean Society of Marine Environment & Safety
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• v.20 no.6
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• pp.671-676
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• 2014

Based on the data of PSC information management system of MOF(Ministry of oceans and fisheries) and APCIS(Asia-Pacific Computerized Information System) of Tokyo-MOU information system, the result of the evaluation on the reality of PSC was done, and base on 2009, it showed a trend of decrease in every DFR(Deficiency Rate) and DTR(Detention Rate). But for vessels built for more than 30 years, flags of convenience vessels, RO-RO ferry and general cargo vessel, small size vessels with gross tonnage less than 1,000 ton showed a high DFR and DTR. Each harbours is classified by the total harbours' average DFR which was 82.5 % and the average DTR was 5.1 %, excluding the Jeju harbour, showing a hugh deviation for classification of each harbour. Classification of each harbour has to be inspected by PSC and it showed a great unbalance of the number of vessels for each territory for inspection. the biggest problem with our country's PSC, where it was pointed out by the PSCO was lack of workers and independent inspection by just one worker. To strength the substantiality of the inspection of our country is to have concentrated inspection on the high risk cautious vessels, forming a human network each classified by four different sectors of the area, recalculating the amount of assignment of inspection classified by each harbour and securing workforce the PSCO improvements are necessary.