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Article type: Cover
1987 Volume 38 Issue 2 Pages
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Published: June 15, 1987
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Article type: Cover
1987 Volume 38 Issue 2 Pages
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Published: June 15, 1987
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Article type: Appendix
1987 Volume 38 Issue 2 Pages
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Article type: Index
1987 Volume 38 Issue 2 Pages
Toc1-
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Article type: Appendix
1987 Volume 38 Issue 2 Pages
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Takao HADA
Article type: Article
1987 Volume 38 Issue 2 Pages
73-79
Published: June 15, 1987
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The problem to determine such a line type locatin of facilietis that minimizes the sum of the backward flow of material is called the backward flow minimization problem. This paper shows first that this problem can be formulated as a specific type of 0-1 integer progarmming problem known as the set covering prolbem. As a result, the optimum solution of this problem can be obtained by utilizing various solution procedures already presented for the set covering problem. Next, two different procedures are proposed to determine an initial feasible solution of the set covering probelm. Finally, a reducitn method for the set covering problem is discussed.
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Takao HADA
Article type: Article
1987 Volume 38 Issue 2 Pages
80-87
Published: June 15, 1987
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It has already ben shown that teh backward flow minimization problem in facilities location planning can be formulated as the set covering problem (P), a special type of 0-1 integer programming problem However, the number of constraints in this formulation gorws exponentially with the size of the problem. Accordingly, this studh proposes an optimizatin algorithm of (P) analogous to the so-called row generatin scheme that requires no explicit enumeration of constraings of (P) in advance. The method proposed here basically belongs to a family of cutting plane methods. The proposed method seems to be advantageous from the viewpoint of computational error because the cutting plane generated by the method can be determind without divisions.
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Shigeji MIYAZAKI
Article type: Article
1987 Volume 38 Issue 2 Pages
88-93
Published: June 15, 1987
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This paper determines the economic order quantity to be controacted prior to the production of purchased materials for minimizing the expected loss due to the surplus or shortage of delivered materials which probabilistically vary. An application is shown in the fresh agricultrual products for which the order quantity is specified by the area of cultivated land. The nomograph is presented to obtain the optimal order quantity under various cost ratios between the surplus and the shortage of materials and the vairous coefficients of variationi n supply quantity.
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Ikuo ARIZONO, Hiroshi OHTA
Article type: Article
1987 Volume 38 Issue 2 Pages
94-99
Published: June 15, 1987
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A goodness-of-fit test, based on sample entropy, for normality was given by Vasicek. The test, however, can be applied only to the composite hypotesis. In this paper a new test of fit for normality is introduced based on Kullback-Leibler inforamtion. The Kullback-Leibler information is an extended concept of entropy, and so the test can be applied not only to the composite hypotesis but also to the simple hypothesis. The power comparisons of the proposed test with the some other tests are illustrated and discussed.
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Shigeji MIYAZAKI
Article type: Article
1987 Volume 38 Issue 2 Pages
100-104
Published: June 15, 1987
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This paper presents nomographs for evaluting the relative size of parts inventory csts yielded by the pull system and the aprts-oriented system for the multi-stage production The parts-oriented system indicates the less inventory costs under the larger vaiation of aprts demand, the larger production stages for aprts, and the higher safety stock level. The merit of pull system increases as the variation of parts demand and teh safety stock level decreases, resepctively, which have been treated as management goals of Toyota Produciton System (the typical example of pull System).
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Sanae OGAWA, Hiroshi OHTA
Article type: Article
1987 Volume 38 Issue 2 Pages
105-111
Published: June 15, 1987
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If a destructive test can be replaced by an alternative non-destructive test then the quality cost may be reduced. For this reason, Reiw and Bai proposed a following economic attributes acceptance sampling plan. The destructive test is carried out in the first sampling inspection and a lot is classified into acceptance, screening and rejection. The non-destructive test allowing misclassification erros is carred out only in the case of screening inspection. if the destructive test can, however, be replaced by the non-destructive teste, an acceptance sampling plan in which the sampling and screening inspections are both non-destructive can also be considered. In this paper, the acceptance sampling plan without destructive test is compared with the acceptance sampling plan proposed by Reiw and Bai from the viewpoints of quality cost and quality assurance.
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Masahiro NOWATARI
Article type: Article
1987 Volume 38 Issue 2 Pages
112-119
Published: June 15, 1987
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This is a study on cooperative work to be done by organizing a team of two workers. An assumption was made that work time of a team is affected by the following three factors : work time of each worker, conversation made in a team during work and the level of satisfaction each worker obatins from his work. Based on this assumption, experiments were made and results were analyzed. The analysis indicated that, if work assignment is the same, work time of a group is affected by these factors to the different degrees, depending on a role-making (work method) applied by a team.
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Takao TANAKA
Article type: Article
1987 Volume 38 Issue 2 Pages
120-125
Published: June 15, 1987
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A COC System simplifies the control problem of multi-item inventories by dividing te items in stock into subgroups with a common order cycle for all items in each group. This report provdies a stochastic demand model for the COCS with normal demand distributions. Two algorithms have been proposed toobtain an optimal grouping for a given number of groups. The values of excess costs of COCS over no grouping system are relative to the coefficient of variation of distribution of τwith its frequency proportional to α, where τand α is the reciprocal of economic order cycle and the set-up cost of each item respectively
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Shigeji MIYAZAKI, Noriyuki NISHIYAMA
Article type: Article
1987 Volume 38 Issue 2 Pages
126-131
Published: June 15, 1987
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This paper dirvers two formulas to calcualte the average inventory yielded by fixed interval withdrawal Kanban and supplier Kanban, respectively, in Toyota Produciton System. Secondly, two formulas to determine the minimum number of Kanbans to be required for fixed interval withdraewal and supplier Kanban are shown. An algorithm to obtain the optimal order cycle is proposed to minimize the total operating costs composed of the inventory costs and te order costs by Kanban System.
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Cheolho YOON, Masao AKIBA, Takao ENKAWA, Kenji ITOH
Article type: Article
1987 Volume 38 Issue 2 Pages
132-138
Published: June 15, 1987
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This study considers the effects of various VDT tasks, with different contents, on physiological and psychological reactions. Data input, word processing, video games, experimenter-imposed programming and subject-imposed programming were chosen. Measurements of teh CFF, near point, urinary adrenailine exceretion rate, and subjective assessment were taken befoer, between and after the same task. A retrospective questionnaire was also incorporated in order to extract the major factos that characterize the VDT tasks. The result showed that data input and word processing task were characterized by poor variation and lack of task valuableness. It was also found that subjects were impaired not only in terms of feelings of fatigue and motivation but also with physiological reactions. In contrast, the subject-imposed programming was fuound to have variation and task valuableness, and the subject's impairment on psychological reactions were significantly reduced.
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Article type: Appendix
1987 Volume 38 Issue 2 Pages
139-140
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Article type: Appendix
1987 Volume 38 Issue 2 Pages
141-
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Article type: Appendix
1987 Volume 38 Issue 2 Pages
142-
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Article type: Appendix
1987 Volume 38 Issue 2 Pages
143-144
Published: June 15, 1987
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Article type: Appendix
1987 Volume 38 Issue 2 Pages
145-147
Published: June 15, 1987
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Article type: Appendix
1987 Volume 38 Issue 2 Pages
App3-
Published: June 15, 1987
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