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Article type: Cover
1975 Volume 25 Issue 4 Pages
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Published: March 31, 1975
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Article type: Cover
1975 Volume 25 Issue 4 Pages
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Published: March 31, 1975
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Article type: Appendix
1975 Volume 25 Issue 4 Pages
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Published: March 31, 1975
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Article type: Index
1975 Volume 25 Issue 4 Pages
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Article type: Appendix
1975 Volume 25 Issue 4 Pages
248-
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Shigeo KASE
Article type: Article
1975 Volume 25 Issue 4 Pages
249-252
Published: March 31, 1975
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Haruo MIYAZAKI
Article type: Article
1975 Volume 25 Issue 4 Pages
253-265
Published: March 31, 1975
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This paper presents some results dealing with statistical inferences in presence of isotonic conditions. Isotonic regression problem is to minimize Σ__<xεX>{g(x)-f(x)}^2 w(x) subject to the restriction of partial ordering of f(x) where w(x)>0 and g(x) are given for any x ε X. The solution is called the isotonic regression on g(x). A generalization of this regression and algorithms to obtain the solution are given. The isotonic regression also solves many other problems such as mulidimensional scaling, inventory problems, production plannings, taut string and so on. Statistical tests under ordered hypothesis have been studied by many authors, some of whom are Bartholomew, Barlow, Brunk, Bremner [1]. In this paper, Bartholomew's X^^-^2 and E^^-^2 tests are considered under normal assumption. It is shown that these tests are more powerful than X^2 test.
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Yasuo KOBAYASHI, Masashige TSUJI
Article type: Article
1975 Volume 25 Issue 4 Pages
266-271
Published: March 31, 1975
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A management system consists of various sub-systems. This paper takes up the organizational structure and the responsibility system of profit from these sub-systems. Purposes of this study are (1) classification of the types of these systems, and (2) analysis of the relations of system types and structural features of firms. The outlines of this study are as follows; these systems are dependent on structural features of firms such as the scale, the diversification, the economic types of production, the technical types of production and so on. This study was accomplished through investigation of real systems.
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Michio AMAGASA, Eiichiro TAZAKI
Article type: Article
1975 Volume 25 Issue 4 Pages
272-277
Published: March 31, 1975
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The system synthesis problem is viewed as a combinatorial problem in which the best combination of subsystems is searched among all the possible combinations. However, as the number of subsystems increases, the problem will become too complex to solve. Structure variable approach makes it possible to transform a combinatorial problem into a usual variational calculus problem.A gradient method for attaining the optimal structure is proposed by employing structure variables. In order to show how the proposed method works, we have applied it to the optimal synthesis of an inventory and transportation system.
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Kazukiyo KUROSAWA
Article type: Article
1975 Volume 25 Issue 4 Pages
278-281
Published: March 31, 1975
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The author argues that the factors determining worker's productivity in business firms should not be treated independently of the socio-economic relationships. There are main factors that determine the rate of performance in firms such as productiveness of labour force, intensity of labour and the rate of output per man-hour, all of which are interacted to determine socially defined productivity of workers. The key concept as an intermediary between factors is the social standard of intensity of labour which is formed on the level of nation through interaction between capital and labour. This paper elucidates the following rule founded on socially objective law : a worker's productivity should be evaluated by his rate of output per hour when his intensity of labour is below the socially-normal intensity of labour, and directly by his productivity of its original meaning when his intensity of labour is above that.
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Akiyuki SAKUMA
Article type: Article
1975 Volume 25 Issue 4 Pages
282-287
Published: March 31, 1975
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The attempt to statistically analyze the characteristics of the therbligs with the purpose of improving the accuracy of rating method had encountered various difficulties with respect to the availability of device for experiment and thus the approach had not been employed. This study in which an experimental device was designed to gather and process a large number of data taken from the continuous series of therblig made it possible to employ the abovementioned approach. Some of the basic characteristics concerning the therbligs which were not known to us thus far were made clear as a result of statistical analysis.
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Fumio AKAGI, Hirokazu OSAKI, Susumu KIKUCHI
Article type: Article
1975 Volume 25 Issue 4 Pages
288-292
Published: March 31, 1975
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This paper deals with the relation between the aptitudes of the workers decided by the vocational aptitude test No.1 and No.2 of the Japan Ministry of Labor, and the skill of the workers showed by the assembly time of a small electric switch. Then it is made clear that the assembly skill is correlated to the results of the test No.2 more closely than to those of the test No.1. And further we found that two tests of the test No.2 - Test of Turn and Test of Assemble - are the most important factors in estimating the assembly skill by the multiple regression equation.
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Masatoshi KITAOKA, Hiroshi KUMASAKA
Article type: Article
1975 Volume 25 Issue 4 Pages
293-298
Published: March 31, 1975
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The purpose of the present paper is to describe a mathematical configuration model that could be used by any analysis of body movements in materials handling. This approach can be used : 1. To decide some important factors which are caused by spatial configuration in materials handling. 2. To evaluate a harmonic analysis of some factors that are caused by the body movements. 3. To develop a computerized mathematical model which determines the configuration of a worker in materials handling. Development, validation, and application of the model are discussed.
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Ken MURASUGI, Iwao OHASHI, Ryuji IYOROI
Article type: Article
1975 Volume 25 Issue 4 Pages
299-304
Published: March 31, 1975
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Herzberg's two-dimensional theory was derived from the investigation about critical incident on present job or past job. But it is more important for us to study how the job feeling has been changing from past to present. To investigate the job feeling of the past, we used Herzberg's M-H analysis, and to investigate the job feeling of the present, we used morale survey. This paper deals with the examination of the Dual-factor theory by analyzing and comparing the two investigations.
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Hiroshi OHTA, Toru SAKAMOTO
Article type: Article
1975 Volume 25 Issue 4 Pages
305-309
Published: March 31, 1975
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The critical path method for project management is receiving increasing acceptance because of its practical value. The backbone of this technique is a graphic model of a project and its solution is based on the theory of flow through a network.Shankar and Nair have presented an approach for establishing the electrical analogy of this technique. This paper explains a proposition for industrial engineering experimental apparatus founded on their research. It makes certain suggestions for the use of this apparatus within the framework of industrial engineering experiments.
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Article type: Appendix
1975 Volume 25 Issue 4 Pages
310-311
Published: March 31, 1975
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Article type: Appendix
1975 Volume 25 Issue 4 Pages
312-326
Published: March 31, 1975
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Article type: Appendix
1975 Volume 25 Issue 4 Pages
327-
Published: March 31, 1975
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Article type: Appendix
1975 Volume 25 Issue 4 Pages
328-
Published: March 31, 1975
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Article type: Index
1975 Volume 25 Issue 4 Pages
329-330
Published: March 31, 1975
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Article type: Appendix
1975 Volume 25 Issue 4 Pages
331-
Published: March 31, 1975
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