Journal of Japan Industrial Management Association
Online ISSN : 2187-9079
Print ISSN : 1342-2618
ISSN-L : 1342-2618
Volume 58 , Issue 6
Showing 1-19 articles out of 19 articles from the selected issue
  • Type: Cover
    2008 Volume 58 Issue 6 Pages Cover11-
    Published: February 15, 2008
    Released: November 01, 2017
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  • Type: Index
    2008 Volume 58 Issue 6 Pages Toc6-
    Published: February 15, 2008
    Released: November 01, 2017
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  • Yoichi Seki
    Type: Article
    2008 Volume 58 Issue 6 Pages 409-
    Published: February 15, 2008
    Released: November 01, 2017
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  • Hirokazu Kono, Tadahiro Mizumachi
    Type: Article
    2008 Volume 58 Issue 6 Pages 411-422
    Published: February 15, 2008
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    This paper proposes a method for evaluating the profitability and safety of investment alternatives under uncertainties. The paper assumes that each alternative is composed of initial investment, annual fixed cost, machine life, and interest rate. For the product produced as a result of investment, assumptions are made on its unit sales price, sales volume, unit variable cost, and product life. As a result, each alternative is composed of such factors as sales price, annual sales and production volume, unit variable cost, and annual fixed cost. The paper examines the case in which the values of the above-mentioned four factors fluctuate from period to period, as can be frequently observed in reality. The paper first defines the profit equation as a function of the four factors. It then proposes a total-cost unit-cost domain, in which the horizontal axis represents total income and expenditures, while the vertical axis refers to unit price and cost, for each j-th period over the planning horizon. Both of the domain's axes are converted to the ratio as compared to net income for the first year, which is referred to as the normalized total-cost unit-cost domain. The paper then discusses a method to consolidate multiple normalized domains into a single totalcost unit-cost domain. For the proposed single domain, fluctuation from the expected value for each of the four factors can be visually displayed and analyzed. A systematic procedure for identifying a safer area against changes in each factor is presented. The validity of the proposed procedure is confirmed using a numerical example.
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  • Koji Shingyochi, Hisashi Yamamoto
    Type: Article
    2008 Volume 58 Issue 6 Pages 423-429
    Published: February 15, 2008
    Released: November 01, 2017
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    A circular consecutive-k-out-of-n: F system consists of n components arranged along a circular path. This system fails if k or more consecutive components fail. As the number of components n increases, the amount of calculations to obtain a solution within a reasonable computing time would be too much, except for the special cases of k=1,2,n-2,n-1,n. Therefore, most of the recent studies have focused on proposing algorithms to obtain quasi optimal arrangements. It would be meaningful for such studies, however, to obtain the exact optimal arrangement of a moderate-sized system and investigate its characteristics. In this paper, we propose an efficient algorithm for solving this problem. We developed this algorithm to reduce the search space by eliminating arrangements with equal system reliability produced by rotation and/or reversal of certain arrangements. In addition, this algorithm also prevents redundant calculations by memorizing the calculated values, when depth first search is conducted, based on Hwang's formula calculating the reliability of a circular consecutive-k-out-of-n: F system. We conducted some numerical experiments in order to evaluate this algorithm. The results of the experiments show that our proposed algorithm can reduce computing time to approximately 1/4n as compared to an exhaustive search.
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  • Hiroyuki Goto
    Type: Article
    2008 Volume 58 Issue 6 Pages 430-437
    Published: February 15, 2008
    Released: November 01, 2017
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    This paper proposes an optimal ordering method suitable for short lifecycle products whose demand is strongly dependent on the day of the week. Regarding application industries, we focus on retail stores such as $1 or convenience stores, most of which have limited space for display but a significantly large number of items. A considerable amount of research in inventory control has hitherto been carried out. We can, however, find few developments that can consider and handle the constraints imposed on the sector under consideration. Hence, this paper proposes a demand prediction and optimal ordering method utilizing the idea of a prediction limit that is common in regression analysis. The proposed method is advantageous in that it can be applied to newly introduced products, as it requires only a small number of samples for the parameter estimation. In the latter part of this paper, numerical simulations are performed using the actual sales records of a retail company, and the effectiveness of the proposed method is confirmed.
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  • Makoto Suzuki
    Type: Article
    2008 Volume 58 Issue 6 Pages 438-444
    Published: February 15, 2008
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    In this paper, automatic text categorization is considered to be a series of information processing and I propose a new classification technique called Maximum Frequency Ratio Accumulation Method (MFRAM). This is a simple technique that adds up the maximum ratios of term frequency among categories. However, in MFRAM, the use of feature terms is unlimited. Therefore, I propose the use of Character N-gram and Word N-gram as feature terms using the above-described particularity of MFRAM. Next, the proposed method is evaluated by performing several experiments. In these experiments, I classify newspaper articles from Japanese CD-Mainichi 2002 and English Reuters-21578 using the Naive Bayes method (baseline method) and the proposed method. As a result, I show that the classification accuracy of the proposed method is better than that of the baseline method. Specifically, the recall of the proposed method is 88.5% for Japanese CD-Mainichi 2002 and 83.1% for English Reuters-21578. Thus, the proposed method has very high performance. Although the proposed method is a simple technique, it provides a new perspective and has excellent potential and is language-independent. Thus, the proposed method is expected to be developed further in the future.
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  • Yasunori Fujita, Masatoshi Mori
    Type: Article
    2008 Volume 58 Issue 6 Pages 445-450
    Published: February 15, 2008
    Released: November 01, 2017
    JOURNALS FREE ACCESS
    The fashion business has complex demand dynamics. Competitive advantage is severely damaged if a fashion retailer cannot keep up with the fluctuation in fashion demand. Scientific supply chain management is crucial to success. The present study is an attempt to shed new light on this field. That is, the present study develops a supply chain management strategy for fashion retailers by making use of the optimal stopping theory. The analysis reveals that the fashion retailer should introduce new items frequently and increase the variety of items if (1) the fashion retailer is more vulnerable to other fashion retailers' inventions of new items, (2) profit decreases quickly, or (3) the market as a whole is less uncertain.
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  • Hirofumi Hoshika, Koichi Miyazaki
    Type: Article
    2008 Volume 58 Issue 6 Pages 451-458
    Published: February 15, 2008
    Released: November 01, 2017
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    This paper examines three kinds of deterministic volatility models. We identify the model that attains the most precise fit with options market prices, as required for accounting purposes, using an optimization model. We also draw attention to another important point in the selection of an appropriate option-pricing model.
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  • Akihiko Fujino, Masaaki Ohba, Hisashi Yamamoto
    Type: Article
    2008 Volume 58 Issue 6 Pages 459-464
    Published: February 15, 2008
    Released: November 01, 2017
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    Reviewing prior studies about consumer store choice orientation and shopping behavior toward grocery stores, these three prepositions were supposed: (a) Consumers have many different store choice motives, but central orientations for store choice exist, and the orientations can be extracted in any regional area if representative samples of the area are selected. (b) The extracted orientations are basic characteristics that depend on consumers' variation of store choice. Therefore, the extracted orientations should reflect consumer shopping behavior and lifestyle values in the local region. (c) Consumers are clustered by the store choice orientations, and each cluster has a kind of homogeneous shopping behavior; especially, different store-type (intertype) shopping behaviors. The objective of this study is to prove the three prepositions (above (a)-(c)) in Japan. It was attempted to extract store choice orientations from consumer shopping motives. After that, consumers were classified by store choice orientations and the relation between the clusters and store-type choice behavior were specified. As many retail formats have been developed in Japan, most consumers can purchase the same products from a variety of retailers. Therefore, it should be considered that consumers choose a grocery store from different store-type alternatives. It would be meaningful that store choice orientations are concerned with the intertype (between different store types) shopping behavior. An empirical study showed that four consumer store choice orientations ('store quality', 'convenience', 'travel' and 'price') were extracted and four consumer clusters ('demanding shoppers', 'time-convenience shoppers', 'travel-conscious shoppers' and 'price-conscious shoppers') emerged by the orientations. There were differences in store-type choice tendencies among these four clusters, and the four clusters were different from the segments that were separated by the demographic attributes of age and household size.
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  • Type: Index
    2008 Volume 58 Issue 6 Pages 465-467
    Published: February 15, 2008
    Released: November 01, 2017
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  • Type: Index
    2008 Volume 58 Issue 6 Pages 468-471
    Published: February 15, 2008
    Released: November 01, 2017
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  • Type: Appendix
    2008 Volume 58 Issue 6 Pages App27-
    Published: February 15, 2008
    Released: November 01, 2017
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  • Type: Appendix
    2008 Volume 58 Issue 6 Pages App28-
    Published: February 15, 2008
    Released: November 01, 2017
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  • Type: Appendix
    2008 Volume 58 Issue 6 Pages App29-
    Published: February 15, 2008
    Released: November 01, 2017
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    Download PDF (80K)
  • Type: Appendix
    2008 Volume 58 Issue 6 Pages App30-
    Published: February 15, 2008
    Released: November 01, 2017
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    Download PDF (80K)
  • Type: Appendix
    2008 Volume 58 Issue 6 Pages App31-
    Published: February 15, 2008
    Released: November 01, 2017
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    Download PDF (80K)
  • Type: Appendix
    2008 Volume 58 Issue 6 Pages App32-
    Published: February 15, 2008
    Released: November 01, 2017
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    Download PDF (80K)
  • Type: Appendix
    2008 Volume 58 Issue 6 Pages App33-
    Published: February 15, 2008
    Released: November 01, 2017
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    Download PDF (80K)
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