Journal of Japan Industrial Management Association
Online ISSN : 2187-9079
Print ISSN : 1342-2618
ISSN-L : 1342-2618
Volume 61 , Issue 4
Showing 1-14 articles out of 14 articles from the selected issue
  • Type: Cover
    2010 Volume 61 Issue 4 Pages Cover8-
    Published: October 15, 2010
    Released: November 01, 2017
    JOURNALS FREE ACCESS
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  • Type: Cover
    2010 Volume 61 Issue 4 Pages Cover9-
    Published: October 15, 2010
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    Download PDF (17009K)
  • Type: Index
    2010 Volume 61 Issue 4 Pages Toc5-
    Published: October 15, 2010
    Released: November 01, 2017
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  • Toshitaka Bou, Masahiro ARAKAWA
    Type: Article
    2010 Volume 61 Issue 4 Pages 223-233
    Published: October 15, 2010
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    The vehicle routing problem has been focused on as a significant problem in recent production environments. This problem involves decision-making in regard to the number of vehicles and combination of locations for each vehicle. When multiple measures are used to evaluate results and some measures have a trade-off relationship, the problem should be treated as a multi-objective problem. Furthermore, incorporating different search procedures is useful for optimizing different measures and obtaining better Pareto solutions. In this study, a hybrid multi-objective genetic algorithm is proposed to generate Pareto solutions in a short calculation time for the bi-objective vehicle routing problem with a time window. Total distance traveled and average completion time are adopted as two objective functions in the problem. In the proposed method, different search methods are introduced to optimize different objective functions and the methods are incorporated into a multi-objective genetic algorithm framework. The proposed method is evaluated through numeric experiment and bench-mark problems. The experimental results show that introducing a combination of different search methods is effective in improving values of the different objective functions in Pareto solutions. Furthermore, the proposed method generates high-quality Pareto solutions in short calculation times.
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  • Hisashi YAMAMOTO, Jing SUN, Takayuki OISHI, Masayuki MATSUI
    Type: Article
    2010 Volume 61 Issue 4 Pages 234-243
    Published: October 15, 2010
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    In a social system or production line, the restrictions of the cost and the due-time exist in each period (or process). Generally, whether this restriction is satisfied is not only dependent on the risks of this period, but also the risks generated beforehand. We consider controlling the production process by switching to a faster processing rate at a given point (period). This paper considers the optimal switching period to minimize the total expected cost of the production process. In this paper, first, the optimal switching problem is systematically classified and the corresponding model is presented. Next, the mathematic formulation of the total expectation for the above case is proposed. Finally, the policy of an optimal switching period is investigated in detail through numerical experiments.
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  • Junpei Jo, Shigeji MIYAZAKI
    Type: Article
    2010 Volume 61 Issue 4 Pages 244-252
    Published: October 15, 2010
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    Past research has clarified that information technology (IT) supports economic growth. The application of IT positively influences the economy and corporate management. The importance of IT is therefore increasing in economic and corporate activities. Major Japanese retailers with revenues of approximately 30-70 billion yen report positive IT investment, but they have not realized the desired outcomes from that IT investment. This is true not because of the IT investment is insufficient, but because of an inability to use IT assets effectively. Due partly to the influence of this problem, retail productivity in Japan is not as high as that in the United States; companies cannot achieve a high profit rate. This paper presents a discussion of the future direction of IT applications from the perspective of the degree of IT utilization, and also reports results of empirical analyses of the relationship between IT utilization frequency and managerial indicators. The analyses described examine the influences of IT utilization on company (retail dealer) productivity. Empirical analyses of the IT utilization frequency and correlation analysis of productivity were conducted to verify the IT effect hypothesis and to clarify influences on managerial indicators. The correlation of each managerial indicator and IT machinery frequency data were analyzed with respect to duties. Results confirmed a change in managerial indicators depending on the IT utilization frequency. The IT utilization frequency is not irrelevant to overall productivity; managerial indicators were affected by the IT utilization frequency in many cases. Results confirmed that the IT utilization frequency positively influences managerial indicators. Even for different IT equipment and an organization with the same conditions, managerial indicators vary according to the IT utilization frequency.
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  • Tsutomu ONO, Akihiro KANAGAWA, Hitoshi YAMAUCHI, Shigeji MIYAZAKI
    Type: Article
    2010 Volume 61 Issue 4 Pages 253-262
    Published: October 15, 2010
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    Every Voronoi region has a polygonal form and has a point which is called generatrix. In this paper, we treat the generalized Voronoi regions as Voronoi regions with weighted generatrices. If the weights of all generatrices are identical, these regions conform with usual Voronoi regions. Suppose a set of points which are not generatrices and usual generatrices are distributed on a plane. Proposed procedures in this paper can find a set of suitable generatrix weights so as to include points in the respective region in accordance with the specified proportion. Tabu search is used to determine generatrix weights. An application of these generalized Voronoi regions is introduced. If points and generatrices are regarded as cities and depots, respectively, this proposal can be applied to the vehicle routing problem (VRP).
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  • Kei MIZUNO, Hideo SUZUKI
    Type: Article
    2010 Volume 61 Issue 4 Pages 263-274
    Published: October 15, 2010
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    In this research, the strategy goals for the Japanese professional sports clubs are set up on the basis of four perspectives in the balanced scorecard, and the performance measures for the given strategy goals are derived, and then a new approach that the relationships between performance measures and critical measures are visually and quantitatively grasped by using network analysis is presented. The balanced scorecard is usually constructed by conducting interviews to the managers and employees which manages evaluation of achievements and strategies from Four Perspectives (Financial, Customer, Internal Business, and Human Resources and Innovation). In that case, "Strategy Maps" for achieving company goals and "Performance Measures" which acts as evaluation measures are necessary. However, there are problems that the result tends to be easily affected by their creator's subjective views, and that the interviewer's high ability is required. Therefore, the questionnaire survey that targeted domestic professional sports clubs on Performance Measures was conducted, and the relationships between Performance Measures were analyzed. The method adopted is the technique of the network analysis. By drawing the network charts, visualization of the relationships between Performance Measures were derived, and by calculating the measures of centrality, critical measures were cleared up. As a result, "The number of spectators in the stadium and the number of event holding are central measures for sports clubs", "the number of spectators and the number of initiate members in fan club relate to the income and play decisive roles of mediation", and "It is necessary not only to increase attendance figures but also to make the stadium into no vacancy to improve ROI" have been revealed. It is thought that ease of answering the questionnaire could be kept because the relations were examined by asking whether their Performance Measures were improved or not, and that data was also able to be collected from the professional sports clubs that does not make financial information public. It has the novelty in the point of being able to collect more data by the above-mentioned analysis techniques and to discuss the relationships between Performance Measures based on objective data.
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  • Type: Appendix
    2010 Volume 61 Issue 4 Pages App26-
    Published: October 15, 2010
    Released: November 01, 2017
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  • Type: Appendix
    2010 Volume 61 Issue 4 Pages App27-
    Published: October 15, 2010
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    Download PDF (41K)
  • Type: Appendix
    2010 Volume 61 Issue 4 Pages App28-
    Published: October 15, 2010
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    Download PDF (57K)
  • Type: Appendix
    2010 Volume 61 Issue 4 Pages App29-
    Published: October 15, 2010
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    Download PDF (57K)
  • Type: Appendix
    2010 Volume 61 Issue 4 Pages App30-
    Published: October 15, 2010
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    Download PDF (57K)
  • Type: Appendix
    2010 Volume 61 Issue 4 Pages App31-
    Published: October 15, 2010
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    Download PDF (57K)
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