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Article type: Cover
1991 Volume 42 Issue 4 Pages
Cover1-
Published: October 15, 1991
Released on J-STAGE: December 17, 2018
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Article type: Cover
1991 Volume 42 Issue 4 Pages
Cover2-
Published: October 15, 1991
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Article type: Index
1991 Volume 42 Issue 4 Pages
Toc1-
Published: October 15, 1991
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Article type: Appendix
1991 Volume 42 Issue 4 Pages
App1-_6_
Published: October 15, 1991
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Masanobu MATSUMARU, Hiroshi YAMASITA, Mamoru OZEKI
Article type: Article
1991 Volume 42 Issue 4 Pages
229-237
Published: October 15, 1991
Released on J-STAGE: December 17, 2018
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The aim of this paper is to analyze the relation between the effects of mergers and the profiles at the time of the merger. These profiles consist of the four factors ; the motivating factors behind merger activity, the type of merger strategy, the type of industry about the acquired companies, and the exchange ratio. To construct this model, we consider the category scores of categories and the weights which the items influence the effects of mergers. We formulate the category scores and weights as the parameter to examine the relationship between the effects of mergers and the profiles in the consideration of the evaluation item phase and the time phase in this model. We show the validity of this model through the analysis by using the data of the merger.
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De-bi TSAO, Takao ENKAWA
Article type: Article
1991 Volume 42 Issue 4 Pages
238-243
Published: October 15, 1991
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In this research, we propose a new two-phased replenishment method for push control system with one central and m units of branch warehouses. At the beginning of the each replenishment cycle, the first replenishment to each branch warehouse is directly shipped through the central warehouse leaving the system safety stock. Retained stock is allocated and shipped to the branch warehouses in a certain instant of the cycle monitoring each branch's stock level. Under the model which allows different demand distributions at branch warehouses and arbitrary second replenishment period, the optimal allocation rule for the second replenishment are derived, and the existence of its optimal period is implied through numerical examples.
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Masabumi TOKORO
Article type: Article
1991 Volume 42 Issue 4 Pages
244-251
Published: October 15, 1991
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This study is concerned with aging characteristics of jobs performed by blue-collar workers in the transportation industry. The questionnaire method is used to evaluate the abilities essential to perform transportation jobs. They are classified into one of three categories based on factor analysis ; intelligence or mental capability, sensitivity to acoustic and visual stimuli, and physical strength. For each job-category the optimum and the critical age for job performance are derived. The labor conditions necessary for aged employees are addressed. Our research reveals that truck drivers have the most difficulty in continuing their work through aging.
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Mikio KUBO, Hiroshi KASUGAI
Article type: Article
1991 Volume 42 Issue 4 Pages
252-261
Published: October 15, 1991
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The many-to-many dial-a-ride problem (DARP) is the problem of designing a route for a vehicle to carry customers with specified pick-up and delivery points. In many practical applications, the DARP is essentially dynamic and probabilistic, and more importantly the policies for the DARP should be 'real time' or 'on line' ; however little attention has been paid for the dynamic version of the DARP. In this paper we analyze the model of the DARP in a dynamic environment using techniques from combinatorial optimization, queuing theory and geometric probability.
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Yasuyoshi SAKAMOTO, Katsuhiro SAKAMOTO, Masashige TSUJI
Article type: Article
1991 Volume 42 Issue 4 Pages
262-271
Published: October 15, 1991
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The manufacturing industry needs Total Flexible Real-time (TFR) production management systems to adapt itself to rapid changing environments. But it hasn't been developed yet. On the other hand, the control aspect of the system that is very important in real field hasn't been studied yet. The purpose of this study is 1) to present a framework of TFR one that uses a horizontal and hierarchical coordinating, 2) to present a detail system architecture to implement it on a computer and 3) to develop a prototype of it. In this study, we could build a flexible system by using distributed and cooperative processing based on black board model.
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Yuichi IKEMORI, Shigeji MIYAZAKI, Hiroshi OHTA
Article type: Article
1991 Volume 42 Issue 4 Pages
272-278
Published: October 15, 1991
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In this paper, an optimal operation planning of the fixed-interval withdrawal Kanban system consisting of known planned demand with random variables is proposed. Behavior of the optimal order interval and the number of Kanbans are investigated in terms of different ranges of the planned demand and random variables. In the case that one of these two ranges is short, the optimal order interval becomes shorter and the number of Kanbans becomes smaller as the other range increases. In the case that one of these two ranges is long, the optimal order interval is almost constant and the number of Kanbans shows a little increase as the other range increases.
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Toshio UENO
Article type: Article
1991 Volume 42 Issue 4 Pages
279-284
Published: October 15, 1991
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This study is considered on a theory that the schedule for large-sized job manufacturing products is reduced. The result is revealed that (1) the minimization of the assembly schedule is that the relationship between the assembly schedule of each operation per operator and the number of operators is ordered of the large size, (2) from the viewpoint of the schedule synthesized the assembly schedule, the minimization of the machining schedule when independent machining in all jobs is possible is that the machining schedule of each job is ordered of the small size.
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Hiroyuki NAGASAWA
Article type: Article
1991 Volume 42 Issue 4 Pages
285-292
Published: October 15, 1991
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A full-functional FMS (Flexible Manufacturing System) containing machining centers with all tools necessary for processing all products to be manufactured in the FMS has high flexibility but is too expensive to realize. A separated-functional FMS is introduced to reduce equipment costs without loss of the system flexibility by separately allocating tools to machining centers. A design problem of the separated-functional FMS is formulated as that of a closed queueing network model. Efficient solution methods to design the separated-functional FMS with balanced loading are proposed by exploiting conjectures derived in this paper. A numerical example is shown to demonstrate the effectiveness of the proposed methods.
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Article type: Appendix
1991 Volume 42 Issue 4 Pages
293-307
Published: October 15, 1991
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Article type: Appendix
1991 Volume 42 Issue 4 Pages
308-310
Published: October 15, 1991
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Article type: Appendix
1991 Volume 42 Issue 4 Pages
311-312
Published: October 15, 1991
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Article type: Appendix
1991 Volume 42 Issue 4 Pages
313-316
Published: October 15, 1991
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Article type: Appendix
1991 Volume 42 Issue 4 Pages
App2-
Published: October 15, 1991
Released on J-STAGE: December 17, 2018
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