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Article type: Cover
1980 Volume 31 Issue 3 Pages
Cover1-
Published: December 31, 1980
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Article type: Cover
1980 Volume 31 Issue 3 Pages
Cover2-
Published: December 31, 1980
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Article type: Appendix
1980 Volume 31 Issue 3 Pages
App1-
Published: December 31, 1980
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Article type: Index
1980 Volume 31 Issue 3 Pages
Toc1-
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Article type: Appendix
1980 Volume 31 Issue 3 Pages
252-
Published: December 31, 1980
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Hatsundo HITOMI
Article type: Article
1980 Volume 31 Issue 3 Pages
253-257
Published: December 31, 1980
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Toshio AWANO
Article type: Article
1980 Volume 31 Issue 3 Pages
258-263
Published: December 31, 1980
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There are many methods for EDP system design. One of them is linear type EDP system desing that is already publishied and popular. The manual is composed by making multi-stages decision process of data processing of objective business affairs. By using these methods, so many EDP systems have been designed and executed, for instance, accounting, fixed property, payment, statistics of business, of staff, progress of construction works, maintenance control, inventory control, estimation of building materials, estimation of toll traffic, management of plan of works and executions in NTT, etc. Generally some solutions were proposed for each stage of process and much discussion was made. But, by using this method, they could always find one solution. In this occasion, there are the questions whether many solutions exist or not and whether the optimal solution exists or not. This paper gives some theoretical backing to linear type system that has so far been made customarily according to manual.
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Takao ENKAWA
Article type: Article
1980 Volume 31 Issue 3 Pages
264-270
Published: December 31, 1980
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This paper considers the basic characteristics of the cross-product solution in factor analysis. The following have been shown.(1)The first column's elements of the loading matrix are approximately identical with the means of the variables and its factorseores represent the difference between individuals'(or samples')mean scores.(2)If these factor scores are equal, the rest of the loading matrix are identical with the covariance lolution's loadings and if not all equal, the rest are not only different from them, but also the covariance solution has the additional factor due to the unequality of these scores.
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Tadayuki MASUI
Article type: Article
1980 Volume 31 Issue 3 Pages
271-277
Published: December 31, 1980
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In the previous paper, we presented an algorithm for detemining the potimal inventory level by using the concept of maginal profit function in a N-stage series-type inventory model with on restrictions. In the model with restrictions on storage capacities(such as facilities or spaces), if some of the solutions offered by this algorithm are over the constraints on the maximum inventory level, we have to determine which stage the overflowing should be reallocated to. In this paper, it is shown that these stages are found out easily by a sumple method using the graph of marginal profit.
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Yasuhiro HIRAKAWA
Article type: Article
1980 Volume 31 Issue 3 Pages
278-283
Published: December 31, 1980
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In a two-stage single-item production-inventory system, the variances of production and inventory are analyzed when the Standerd Linear Procduction Planning Rule is used for each stage to absorb the fluctuation in orders received. The planning rule has a parameter z to adjust the fluctuations in production and inventory. These variances at each stage are derived numerically for a demand series with exponential autocorrelation, using the property of impluse responese. The result may be used to decide how and where the fluctuation of finished demand should be absorbed.
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Shigeji MIYAZAKI, Noriyuki NISHIYAMA, Fumio HASHIMOTO
Article type: Article
1980 Volume 31 Issue 3 Pages
284-289
Published: December 31, 1980
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This paper presents total penalty costs of earliness and tradiness as a new performance measure at due-date scheduling. This measure has more practical meaning than the previous lateness measure. An optimal algorithm to minimize this measure is given through Branch-and-Bound method. Three lower bounds are compared from the viewpoint of node numbers and constrained/unconstrained CPU times.
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Noriyuki NISHIYAMA
Article type: Article
1980 Volume 31 Issue 3 Pages
290-297
Published: December 31, 1980
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This paper discusses the size of mamples required in Stein's two-sample procedure to obtain desired"relative error"for work measurement. The size of initial samples extremely affects the results of two-sample procedure. The optimal sizes initial sample based on the following three criteria are determined : (1)minimization of expected size of total samples;(2)no further sampling;(3)minimization of the cost due to sampling.
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Yasuhiko HOSONO, Hiroshi OHTA, Shigeo KASE
Article type: Article
1980 Volume 31 Issue 3 Pages
298-304
Published: December 31, 1980
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The present paper discusses a new design problem of single acceptance sampling plans by variables for the boubly exponential characteristics in the case of unknown standard deviation. This procesure is based on the MVLUE (minimum variance linear unbiased estimator) for the parameters of the distribution. A comparison is attempted between the proposed plans and the plans which are derived from the linear combination of sample mean and sample standard deviation. Tables of factors are also provided from which the desired sampling plans can be designed without great difficulty.
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Shiro SAKATA
Article type: Article
1980 Volume 31 Issue 3 Pages
305-309
Published: December 31, 1980
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This paper deals with the plots on a bicharacteristic control chart which shows successive runs and upward runs. It is described that a method for finding the out of control is easily derived by arbitrary plotting point and arbitrary run length. So, the values of upper percentage point K^2 for Type 1 error α at two dimensional normal population were computed and tabulated every sample size and run length. Therefore, upon omparing the plotting value of run with the critical value from Table, we can immediately decide the out of control under the sigificance level α.
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Haruki MATSUURA
Article type: Article
1980 Volume 31 Issue 3 Pages
310-315
Published: December 31, 1980
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The purpose of this paper consists in quantitative analysis of the function of intermediate-parts stock as the buffer which absorbs final-product-demand fluctuations in a make-to-stock company. Conclusions are as follows : (1) production-level fluctuations and final-product-stock levels can be reduced by having intermediate-parts stock and (2) the degree of the reduction becomes the larger if the production levels sharply fluctuate.
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Tsutomu TABE, Rintaro MURAMATSU, Yoshihiko TANAKA
Article type: Article
1980 Volume 31 Issue 3 Pages
316-321
Published: December 31, 1980
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In Japanese automobile and electrical industries, it is often necessary to consider the production ordering systems as multi-stage production inventory systems. We are able to classify the multi-stage production ordering systems into two types, i.e.the push-type and the pull-type. This paper discusses the following subjects concerming the push-type multi-stage production ordering system based on forecasting : 1) the effects of forecast errors on the amplification of production order variations and inventory variations in terms of a basic production ordering model, 2) the same effects in a modified production ordering model which is able to decrease both the variations in the production ordering quantities and in the inventory at each stage.
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Masaki IIJIMA, Masakatsu UWAMORI, Mitsuru KATOH
Article type: Article
1980 Volume 31 Issue 3 Pages
322-328
Published: December 31, 1980
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This paper is concerned with designing the standard time data so as to decrease standard time data error and increase practicability. We want to estimate standard time in a short time and with higher precision. The problems when we estimate standard operations times are as follows : Precision and Practicability are though contrary, and their definitions are not clear. In this study, we first define these two items and secondly propose a plan how to partition by using crierion S. We compare the optimal partition method that minimized S with another simplified approximative partition method by using examples of actual application.
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Takehiko MATSUDA, Tetsuo UI
Article type: Article
1980 Volume 31 Issue 3 Pages
329-334
Published: December 31, 1980
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One of the future researches in manpower planning is to integrate the studies on both the quantitative and the qualitative aspects. This paper presents the relationships between the length of service at each calss and promotion policies such as promotion by seniority, promotion at random, promotion by ability, and promotion by the combination of seniority(α)and ability(1-α), respectively. Data on the length of service can be used in studies on the quantitative aspects. Namely, the use of data on the length of service under a particular promotion policy is a way to integrate the studies in the quantitative and the quanlitative aspects in manpower planning.
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Toshirou IYAMA
Article type: Article
1980 Volume 31 Issue 3 Pages
335-341
Published: December 31, 1980
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One of the important problems is to increase the production rate in designing the production line. In thes paper the effectiveness of paralleling the series lines is presented by the simulation method, which is represented by the imaginary buffer capacity. Consequently, it is shown that the imaginary buffer capacity presents the effect of the various design factors on the effectiveness very simply and the imaginary capacity is represented by the linear equation. And it is shown that the paralleling is very useful to increase the production rate.
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Masayuki MATSUI, Tetsuro SHINGU, Hajime MAKABE
Article type: Article
1980 Volume 31 Issue 3 Pages
342-348
Published: December 31, 1980
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Relative relations of seven operating policies for the CSPS model and the structure of effective operating policies are here studied, Generally speaking, non-sequential type policies are inferior to sequential type policies in terms of reducing the expected delay-time per unit produced. The proposed Reserve-dependent and Sequential Range Policy may be optimal as it is superior to other stationary policies. In addition, The monotonic property, a condition of the potimal range strategy, is found in all cases.
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Shizuo SENJI, Kazuo TAKASHIMA
Article type: Article
1980 Volume 31 Issue 3 Pages
349-354
Published: December 31, 1980
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In soft drink indestry, it is a problem that the ratio of bottle cost to the total cost may be large as the investment in bottles needs much money. It is difficult to define the bottle cost because the number of working bottles is fluctuated by seasonal demend pattern and the recycling intervals in market, life span and consumption rate of bottles affect the cost tructure, and deposit income has to be considered as a part of the total cost. The purpose of this thesis is to develop a bottle cost model by using sample data of a maker, and to evaluate the degree and the extent to which the bottle cost is affected by many factors mentioned above.
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Article type: Appendix
1980 Volume 31 Issue 3 Pages
355-356
Published: December 31, 1980
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Article type: Appendix
1980 Volume 31 Issue 3 Pages
357-359
Published: December 31, 1980
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Article type: Appendix
1980 Volume 31 Issue 3 Pages
App2-
Published: December 31, 1980
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