Production Management
Online ISSN : 2186-6120
Print ISSN : 1341-528X
Volume 26, Issue 1
Displaying 1-23 of 23 articles from this issue
Refereed Research Papers
  • ―A Case Study on Olive Industry in Shodoshima Island―
    Mika Yamada, Norio Tokumaru, Nobutaka Odake
    Article type: Refereed Research Papers
    2019 Volume 26 Issue 1 Pages 7-14
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     The food industry in Japan has many community-based which has deep relationship in a region as a local industry. In recent years, it is active for regional revitalization using agricultural products to create new local industries, tourism resources and employment. Along with the expansion of demand for olive oil in Japan, the entry of new entrants into the country has occurred, and the production of olives is increasing. Objectives of the study is to classify developmental promotion process by phase in the case of domestic olive industry which is developing in recent years, case of Shodoshima in Kagawa prefecture, and the elements of the development of Shodoshima's olive industry cluster based on the area. This paper’s methodology, on conducting this research, statistics and literature surveys were used for data collection. Interviews and filed investigation were distributed among companies and institution. The results of the analysis show that, there are four development factors sharing common problem of regional problems with other industries and related organizations, that there are material characteristics suitable for climate, external demand and basic research support, problem sharing among industries has played an important role. It is transforming into an industry with gradual flexibility under a culture based on "co-existence". The community consciousness that is fostered expands the field and sharing purpose with the change of the phase, and the independent collaborative activities lead to organic intersections. Also, based on the knowledge cultivated in existing local industries, value chain such as pursuing advanced expertise has occurred, leading to the development of the area by the development of industry.

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  • – Analysis based on tracking evaluation of fat-lean type -
    Takuya Watanabe, Katsunori Fujii, Hikaru Tanaka
    Article type: Referred Research Papers
    2019 Volume 26 Issue 1 Pages 15-22
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     In evaluating physical growth in earthquake disaster environments, analysis is difficult without data from before and after the disaster. Even if data exist, no methodology for longitudinal evaluation of physical growth has been established. To establish a method for evaluating physical growth after an earthquake disaster in previous research, we applied a wavelet interpolation model based on longitudinal age-related BMI data in schoolchildren. We then constructed a BMI age-related evaluation system chart. In this study, we examined the tracking status of the fat-thin level of school-age children in a nuclear power plant disaster restricted area in Fukuoka Prefecture, and attempted to examine which individuals change and how theydeviate from the normal tracking status. As a result, we derived the figure that 35% of people deviated from the normal tracking status. In girls only, the figure was 31%. In previous findings (2016), age-related changes in BMI tracked unchanged. Considering that the percentage of deviation and fluctuation is generally about 15%, there was shown to be more cases in which BMI clearly deviated and fluctuated in middle school students in the restricted area as a result of the nuclear power plant accident. It is thought that physique, especially fat-thin level, is affected by restrictions in daily life and activities from nuclear power plant accidents. By applying the tracking analysis method in this study, a method to verify the effect of an earthquakedisaster on physical growth and development seems to have been developed. Elucidation of the effect of the Fukushima nuclear power plant accident on the body is thought to have provided a clearer picture of the risks to the body from disasters caused by nuclear power plant accidents.

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  • -The Effects of Smart Glasses Use on Work Proficiency-
    Hiroaki Yamada
    Article type: Referred Research Papers
    2019 Volume 26 Issue 1 Pages 23-31
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     Efforts aimed at addressing diversified needs and at improving the efficiency of production through the use of information and communication technology have intensified in recent years. There have been calls for mechanisms in the field of manufacturing to ensure the effective transference of skills as well as to improve productivity through the use of wearable devices. Initiatives to introduce wearable technology and to verify its application are increasing. The aim of this paper was to examine the effects of the use of a variety of wearable devices, known as smart glasses, on the performance of intellectual tasks. The time required for the operation of the glasses and the variations in the time taken to use the technology were verified through the Achievement Method, which is an appropriate evaluation method to measure work proficiency. The results of this study revealed that the use of smart glasses can promote performance in intellectual work in a stable manner and with minimal variations in operation time regardless of the number of working days and despite differences between workers. Further, smart glasses were found to shorten the time required in the beginning phase of a given job. The glasses are thus deemed to be an effective tool in workplaces where product lines are frequently altered or in companies that face high worker attrition that results in a relatively large number of new workers.

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Research Papers
  • ―Architecture Theory Base Research on Strategy of Major System LSI Companies―
    Takashi Kakimoto, Hiroshi Kubo
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 33-42
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     In order to analyze the system LSI business strategy from a practical viewpoint, we proposed a method of visualization analysis using architecture theory. We decomposed products value as [Products competitiveness]=[Performance]x[Quality]x[Function]x[Cost]x[Delivery]x[Service] which are the essence of competition strategy, and analyzed the positioning of each elements on the architecture. As for the independent system LSI companies, integrated semiconductor company, semiconductor division of vertically integrated company, we visualized and analyzed elements that are placed in integral / closed and elements that are modular and open, and considered the grounds for those positioning. We clarified that the supply side competition strategy has a practical closure inside such as "Dominance of the interface" and "Securing the right to revise the technology", while pretending to open. This showed that the proposal is effective as a method to examine the fact of the common strategy that forms "the real nature of success".

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  • - Analysis of Based on Radar Chart of Physical Ability in Boys -
    Yuzuru Naito, Katsunori Fujii, Kosuke Kasuya, Yusaku Ogura
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 43-48
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     This study compared physical body elements and motor abilities as human resources of obese high school boys in comparison with non-obese boys, and looked and the physical characteristics of obese boys over the three years of high school from a created radar chart. The physical body elements of obese boys tended to be inferior to those of non-obese boys in all measures other than height. In motor ability, the obese boys were shown to have poorer abilities to move their bodies quickly or for long times in the standing broad jump, 50 m dash, and endurance running. This may demonstrate some of the characteristics of physical ability of obese high school boys, elucidate risks associated with the human resource of obesity, and provide information for personnel management to raise productivity in companies.

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  • ―Establishment of instruction methods to improve performance―
    Hikaru Tanaka, Katsunori Fujii, Takuya Watanabe
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 49-54
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     In school physical education classes, the “Pullover” is a skill that is simple and gives students a strong sense of achievement. In a previous study, we suggested the possibility that the pullover may be helpful in assessing motor sense and could be used as a barometer of level of maturity. As a proposal for better managing and increasing efficiency of instruction for the pullover, our aim in this study was to seek effective instructional methods that will lead to an improved rate of success in learning the pullover, and thus lead to better productivity for both the instructors and students. To explore instructional methods that will improve performance in the pullover, we broke down the individual elements and attempted to consider them as tasks that can be learned at an early stage. As a result of investigations into the timing of skill acquisition as well as from the timing of motor learning, we found that the childhood years of ages 4 to 6 are preferable, and that sufficient strength to continue hanging from a bar with the arms bent, are essential elements in improving performance in the pullover. The results suggest that the appropriate timing for practicing the pullover is from preschool age, together with various exercises that involve sustained pull-ups. This increase the pullover success rate and leads to higher productivity in educational instruction. In conclusion, this study showed that sustained pull-ups are a very useful pre-condition for practicing the pullover.

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  • Kazumasa Ohashi
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 55-60
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     In this paper, the integrated manufacturing methodology for the regional management is developed as the role of the regional revitalization. This integrated manufacturing model is a sort of the supply chain model from the material to the distribution sale through machining process.

     By using the suggested methodology, the integrated manufacturing objective is widely identified, and the solution-skill is easily obtained for problem-solving.

    Consequently, the concept of the integrated manufacturing methodology is effective in the revitalization of regional industry. Finally, some examples are demonstrated for the feasibility of applications.

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  • ―To Make Well-Being as the Foundation of Corporate Sustainability―
    Akira Umemura
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 61-66
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     The movement to enhance employee well-being has been going on in developed countries. Its primary purpose is to gain talented employees as well as improve personal and organizational operations. A medium and small sized company manager with high consciousness for well-being I had an interview puts the agenda for enhancing well-being on the performance improvement and how to create the innovations. By the way, according to a Gallup’s research, work engagement among employees is not high across the world. This study examined the useful factors for the companies to have well-being work as motivational factors, enhance work engagement, and install and entrench the corporate system that will lead to the environment for the innovation, and a framework using those useful factors.As a result of this study, I concluded as below;

    1) We can overlook the correlation between well-being and performance, applying the service profit chain framework.

    2) It is the agenda for well-being to work as a motivational factor to make well-being a cause of good performance and innovation.

    3) The viewpoints to solve the agenda should be something that can raise the level of work engagement and activate the leadership on site.

    4) I suggest a framework, in which corporate initiatives for the reform of working practices and the leadership exertion at the site to make them practical shall be crucial factors to create the base of high performance and the innovations.

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  • Yasumasa Hironaka
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 67-72
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     The productivity of Japanese food manufacturing industry is only about 60% of manufacturing average. The actual occupancy rate, which is the ratio of the actual operation time to the whole operation time, is also 60 to 70% which is comparable to the productivity ratio to the manufacturing average. In other words, the food factory has low productivity due to the short operating time relative to the operation time. Until now, the cause of low productivity in the food manufacturing industry has been thought to be in the multi-item small-sized production, delay in the expansion factory scale and the automation, but the production characteristics of the food factory such as pulsating flow production by batch production, equipment structure such as oven.The effect of line stoppage caused by inefficient production schedule, individual complete work, cleaning, Washing, sterilization etc. is large. In addition, we can’t ignore the influence of the factory entrance sanitary routine, delivery shortage penalty and slow ordering time distribution etc. Improving the actual utilization rate is the key to improving productivity of food factories.

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  • – Analysis in Males –
    Yuzuru Naito, Katsunori Fujii, Yuki Kani, Kentaro Hayakawa
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 73-78
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     Hidden obesity is said to be a risk for sarcopenic obesity, and accurate measurements of hidden obesity and attempts to analyze its health risks are needed. In this study we sought a method to determine hidden obesity from BMI and body fat percentage with the aim of analyzing the health risk of people with hidden obesity using that method. Subjects were divided into three body type groups (standard, hidden obese, obese) based on BMI and body fat percentage. One-way analysis of variance was then used to compare physical, physiological, and physical fitness elements in the three groups. The physiological elements in the hidden obese group tended to be the same as those in the standard group. Among strength elements, the grip strength in the hidden obese group was the lowest among the three groups, while all other measurements tended to be significantly inferior second to the obese group. The above raises an alarm for the physical risk of hidden obesity.

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  • Yuki Kani, Katsunori Fujii, Kohsuke Kasuya, Yuzuru Naito
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 79-84
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     Bergmann’s rule is a theory put forth by Carl Bergmann (1847) which states, briefly, that among homeothermic animals those living in colder regions have higher body weight and those living in warmer regions have lower body weight. Almost no studies in Japan have investigated whether this rule can be applied directly to humans. In this study we place the secular trends in height in the 47 prefectures of Japan onto a secular change standardization chart that we prepared of male and female third year high school students (17 years old) nationwide from 1955 to 2010. We then evaluated the secular trends. Based on this we applied Bergmann’s rule to the distribution of secular change in height with consideration of the economic growth of each prefecture. One may speculate that the extent and range of use of Bergmann’s rule can be surmised with this. Then, thinking that the extent of usage of Bergmann’s rule can be replaced with educational productivity, we investigate hypotheses of that productivity.

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  • - Regarding Tracking of Motor Fitness -
    Yusaku Ogura, Katsunori Fujii, Hikaru Tanaka, Nozomi Tanaka
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 85-90
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     Many companies today place importance on managing the health and productivity their employees. The physical fitness of adults is reported to be greatly affected by their physical activity in early childhood. In this study we established a tracking system evaluation for motor fitness, one type of physical resource. We then analyzed the motor fitness tracking system in schoolchildren over time with the aim of investigating the likelihood of company employees attaining physical fitness and exploring approaches to health management. Cohorts were established with motor fitness data published by the Ministry of Education, Culture, Sports, Science and Technology, and the wavelet interpolation model was applied to the mean values, mean values ±0.5 SD, and mean values ±1.5 SD from the first to sixth grades of elementary school. A chart to evaluate physical fitness with age was then established. Individual longitudinal motor fitness data from the first to sixth grades of elementary school were applied to that evaluation chart and tracking of more than 70% was confirmed for nearly all items. In almost all children, motor fitness in the first year of elementary school was found to continue to the sixth grade. This suggests that motor fitness evaluations in childhood follow an unchanging trend, and analogously it may be possible to estimate adult motor fitness.

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  • Takashi Iwamoto
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 91-96
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     In recent years, the social progress of AI is spectacular. There will be many people who have concerns that if that situation progresses workers' work simple tasks of workers will be decreasing. Probably it is likely to be so. Even if a new industry is created, a considerably high level of knowledge will be required. In this research, we analyze the influence of AI 's social progress on workers, aim to clarify possible scenarios, refer to their preparation and countermeasures for them.

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  • Takashi Iwamoto
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 97-102
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     The consultant's thought is not publicly published in general terms. Consulting is not special by excluding abstract parts as much as possible and making consultant's thoughts visible as much as possible, and if anyone has certain knowledge, improvements will not be possible. It is thought that not only improvement and simplification of business in the enterprise but also improvement of living in daily life can be achieved. Consultant thinking was originally invented as a prerequisite for system development. But in this research, focusing on RPA and clarifying correspondence relationship between RPA class and consultant thinking by adapting consultant thinking It is the purpose of this research.

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  • Takashi Iwamoto
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 103-108
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     In recent years, the social progress of AI is spectacular. In such a situation, RPA, which is an automation field for office work, has made remarkable progress. In overseas enterprises, RPA has been introduced since the early 2000s, and in the United States where RPA developed, it is said that from25 to 50% of the work done by human beings could be reduced in the spread of RPA. However, there is even a possibility that the company will go bankrupt even if business automation progresses, when the business process stagnates to put it in extreme ways. BPM is indispensable in order to turn PDCA cycle towards the direction which should be indispensable for sustainable corporate survival. In this research, we focus on RPA and aim to find a way to grasp the bottleneck and improve management efficiency by adapting BPMto RPA.

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  • Minoru Kobayashi
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 109-116
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     In this paper, we deal with parallel processing (thread parallel) using shared memory type multi-core CPU in order to accelerate calculation speed on solving solution in a multi-item multi-stage dynamic lot size scheduling model. This model uses the Lagrangian decomposition and coordination method which decompose the original problem into item-based sub-problems and solve them independently with dynamic programming, and coordinate constraint violations that occur among sub-problems. If processing can be assigned to different threads for each item or for some items, the overall processing acceleration can be expected. Therefore in this study, first, we newly code a parallel processing program by OpenMP with the policy to reduce the memory usage using of the structure of the existing program created by us in about two decades ago, and verify the calculation time by numerical calculation. As a result, it was found that the overhead for parallelizing arrays is actually large, and that the effect of speeding-up could not be obtained, and the computation will be slower compared to sequential processing. Therefore, in order to reduce the overhead, we considered that sharing of the main arrays, which are an array for holding functional equations used in dynamic programming and arrays for holding states, etc., is effective. As a result in the numerical calculation using the improved program, the calculation time decreased as the number of threads increased, and acceleration of at least 3 times was achieved at maximum.

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  • Shunichiro Okamura
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 117-122
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

    In these 2 years, 2017 and 2018, the dark side of Japanese conventional method was shown many times. Similarly, it means that some Japanese automobile companies companies such as Nissan, Mazda, Suzuki or material companies such as Mitsubishi Materials Corporation, Hitachi chemical and Kobelco, falsify quality data. When these problems in Japanese companies were broadcasted, executives and contractors denied involvement in falsifying quality data and explained that these actions were dogmatic in working field without order from executives. That is, according to their remarks, it was ex-post that they knew existence of falsifying quality data after broadcasting. If they were true, these problems were categorized to moral hazard. However, is it true that executives do not involve to these problems or do not have responsibility for these problems? The purpose of this paper clarify them theoretically.

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  • ―Effects and Significance of Introducing Role Play―
    Akira Toyama
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 123-128
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     It is thought that the Kanban system in the Toyota production system (TPS) is often taken up in university classes such as production management. As is well known, it is characterized in this method, through each process, inventories (parts, materials, products, products in-process, etc.) and Kanban(a kind of slip or invoice) are kept together in the factories or warehouses. And when the inventories are used, only the Kanban remains. The remaining Kanban should be shown to the previous process to obtain the inventories, and the Kanban and the inventories should be set together again. It seems that it is general to explain such a mechanism using charts etc. in class. However, the degree of understanding for beginner students may not be enough. I tried to introduce a simple role play (action) in the class. It then received a more favorable reaction, I would like to describe the role play effects and significance, and so on.

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  • Kazumasa Ohashi
    Article type: Research Papers
    2019 Volume 26 Issue 1 Pages 129-135
    Published: 2019
    Released on J-STAGE: December 10, 2023
    JOURNAL FREE ACCESS

     Few studies have focused on the methodology of regional revitalization in the traditional and specialized academic. This paper proposes how to pursue the methodology of regional revitalization. Concretely, it would be required for us not only to study the agricultural industry, the manufacturing industry, the commerce industry, and their industrial policies, individually, but also definitely to obtain the integrated knowledge of their industries.

     Therefore, the importance of studying regional management is pointed out, and the actual curriculum for leading the skill acquisition of the integrated knowledge is developed as the principles on the cultivation of human resources. Finally, some examples are demonstrated.

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