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Article type: Cover
1991 Volume 42 Issue 3 Pages
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Published: August 15, 1991
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Article type: Cover
1991 Volume 42 Issue 3 Pages
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Article type: Index
1991 Volume 42 Issue 3 Pages
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Article type: Appendix
1991 Volume 42 Issue 3 Pages
i-iii
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Yasuhiko TAKAHARA, Junichi IIJIMA, Ryo SATO, Xueping LIU, Miguel Angel ...
Article type: Article
1991 Volume 42 Issue 3 Pages
141-150
Published: August 15, 1991
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In this pater, we discuss a new framework for decision support systems. The system developed is called "actDSS" and the framework is basically based on the soft systems methodology. In actDSS, a decision maker can use it as his consultant so as to clarify the nature of a problem through a logical model provided by the system or by debating with it. The system is based on the concept of task ware systems. In task ware system, it is easy to clarify the logical structure of problems for it is basically written in prolog.
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Akira KOUDA
Article type: Article
1991 Volume 42 Issue 3 Pages
151-158
Published: August 15, 1991
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In this paper, the model for defects enumerating error is developed. A product which has a number of defects is classified as conforming or nonconforming by comparing the enumeration of the defects to specified number. Error model of enumeration is constructed as a conditional probability distribution given the number of defects of a product. Assuming that the numbers of defects of products in a lot are distributed by Poisson, it is shown that the two types of inspection errors, classifying conforming as nonconforming and nonconforming as conforming, depend on the rate of nonconforming of the lot. By applying the model to sampling inspection and multiple 100% inspections, the performance of inspections and the effects of enumeration error are examined.
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Hitoshi TSUBONE, Takao TSUTSU, Norikazu YOSHIDA
Article type: Article
1991 Volume 42 Issue 3 Pages
159-167
Published: August 15, 1991
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This paper presents a two-level production planning system where monthly planning imposes constraints on weekly planning. A simulation model that replicates a two-stage fabrication and assembly process was used to evaluate the manufacturing performances under different planning mothods : fixed planning and flexible planning at the weekly planning level. As a result of analysis, this paper clarifies that the flexible planning can control the buffer inventory of finished products at a lower level than the fixed planning, though the total buffer inventory of part items and finished products becomes higher level than the fixed planning.
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Koro URYU, Jiro SHIMIZU
Article type: Article
1991 Volume 42 Issue 3 Pages
168-174
Published: August 15, 1991
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The earth environmental problem is occurring. And the continuation of mankind and ecosystem is concerned about. This happened by minus products produced by economic activities and modern science and technology. The root cause was that the principle of this thinking was a formal logic solely based on things. In this paper, the main discourse constructs a new human central value logic, and the production and the intended cycle constructed by the value logic of this type, the connection law, etc., can satisfy the ecosystem under harmonious cycling conditions. Thus this paper discusses that the earth environmental problem can basically be solved by such method.
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Ikuo ARIZONO, Akio YAMAMOTO, Hiroshi OHTA
Article type: Article
1991 Volume 42 Issue 3 Pages
175-180
Published: August 15, 1991
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The optimization of scheduling problems is considered as a combinatorial optimization problem. Hopfield and Tank showed that some combinatorial optimization problems can be solved based on an artificial neural network system. However, their network model for solving combinatorial optimization problems often attains the local optimum solution depending on the initial state of the network. Recently, some stochastic neural network models have been proposed for the purpose of avoiding the convergence to the local optimum solution. In this paper we attempt to solve the scheduling problem for minimizing the total actual flow time by using the Gaussian machine model, which is one of the stochastic neural network models.
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Seiichi FUJITA, Takayoshi TAMURA
Article type: Article
1991 Volume 42 Issue 3 Pages
181-185
Published: August 15, 1991
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The paper defines a total cost of the production and inventory under the consideration of "time value of money" and then analyzes the economic production order quantity (called a true EPQ) which minimizes the total cost. Although it can be shown that the true EPQ is uniquely determined, an algebraic computation of finding the true EPQ is difficult. The classical EPQ which has been discussed in the traditional inventory theory is introduced for a comparison with the true EPQ. The paper shows that an inequality relationship between the true EPQ and the classical EPQ depends on some parameters of a given inventory model by using a discriminative function.
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Heihachiro FUKUDA
Article type: Article
1991 Volume 42 Issue 3 Pages
186-192
Published: August 15, 1991
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The author has proposed the concept of relative annual profit as a means of judging whether or not the capability (producibility) of a process and the capacity itself are economic. In the current paper, we consider two points regarding economic process capacity planning for a given product where there is a trend for neither any increase in demand nor for any reduction in demand. First, we clarify the effectiveness of relative annual profit through a comparison with profit. It is possible to guarantee a high probability that no loss will occur even in the face of a forecast error regarding the level of sales. Second, we through a comparison with profit clarify the fact that the characteristics of relative annual profit are that it stands in relationship with "the ratio of variable costs to fixed costs." The interpretation made at this point is that "the volume for the break-even point expresses the weight of the cost."
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Masahiro INUIGUCHI, Yasufumi KUME
Article type: Article
1991 Volume 42 Issue 3 Pages
193-199
Published: August 15, 1991
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This paper deals with a linear programming problem with an interval objective function. A new solution concept based on minimizing the maximum regret is proposed. The concept of minimizing the maximum regret is introduced to the final determination of the solution when a reference solution set is given. A method of solution by a relaxation procedure is proposed. Especially, the solution minimizing the maximum regret is obtained by the proposed method of solution when a reference solution set is the set of possibly optimum solutions. In order to illustrate the proposed method of solution, an example is given.
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[in Japanese]
Article type: Article
1991 Volume 42 Issue 3 Pages
200-
Published: August 15, 1991
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
1991 Volume 42 Issue 3 Pages
200-
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Article type: Article
1991 Volume 42 Issue 3 Pages
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1991 Volume 42 Issue 3 Pages
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[in Japanese], [in Japanese]
Article type: Article
1991 Volume 42 Issue 3 Pages
200-
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[in Japanese]
Article type: Article
1991 Volume 42 Issue 3 Pages
200-201
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[in Japanese], [in Japanese]
Article type: Article
1991 Volume 42 Issue 3 Pages
201-
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Article type: Article
1991 Volume 42 Issue 3 Pages
201-
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Article type: Article
1991 Volume 42 Issue 3 Pages
201-
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
201-202
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Article type: Article
1991 Volume 42 Issue 3 Pages
202-
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Article type: Article
1991 Volume 42 Issue 3 Pages
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1991 Volume 42 Issue 3 Pages
202-
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
202-
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Article type: Article
1991 Volume 42 Issue 3 Pages
202-203
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Article type: Article
1991 Volume 42 Issue 3 Pages
203-
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Article type: Article
1991 Volume 42 Issue 3 Pages
203-
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
203-204
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
204-205
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Article type: Article
1991 Volume 42 Issue 3 Pages
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Published: August 15, 1991
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Article type: Article
1991 Volume 42 Issue 3 Pages
205-
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Article type: Article
1991 Volume 42 Issue 3 Pages
205-
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