scholarly journals Standing on the shoulders of giants: production concepts versus production applications. The Hitachi Tool Engineering example

2009 ◽  
Vol 16 (3) ◽  
pp. 333-343 ◽  
Author(s):  
Eliyahu M. Goldratt

This article analyzes the methodologies of Henry Ford, Taiichi Ohno, and Eliyahu Goldratt and presents explicitly the four principles of flow management according to these operations management philosophies. The differences among them are related to different instances of the same principles in different environments: Ford in his industry focusing on mass production of few (or one) products, Ohno at Toyota with the Toyota production System (TPS), and Goldratt in a wide range of production environments. The concepts are illustrated and tested in a practical case of implementation in the Hitachi Tool Engineering company. Here, we have the classic case of an unlikely successful attempt to implement a methodology (Lean), and how the Theory of Constraints (TOC) solved this issue. Finally, the limits for the solution proposed by Goldratt for operations management (DBR) are described.

This thoroughly updated seventh edition is a comprehensive, clearly written, and practical textbook that includes information on both occupational health and environmental health, providing the necessary foundation for recognizing and preventing work-related and environmentally induced diseases and injuries. National and international experts share their knowledge and practical experience in addressing a wide range of issues and evolving challenges in their fields. A multidisciplinary approach makes this an ideal textbook for students and practitioners in public health, occupational and environmental medicine, occupational health nursing, epidemiology, toxicology, occupational and environmental hygiene, safety, ergonomics, environmental sciences, and other fields. Comprehensive coverage provides a clear understanding of occupational and environmental health and its relationships to public health, environmental sciences, and government policy. Practical case studies demonstrate how to apply the basic principles of occupational and environmental health to real-world challenges. Numerous tables, graphs, and photographs reinforce key concepts. Annotated Further Reading sections at the end of chapters provide avenues for obtaining further infomation. This new edition of the book is thoroughly updated and also contains new chapters on climate change, children’s environmental health, liver disorders, kidney disorders, and a global perspective on occupational health and safety.


Author(s):  
Takeuchi Ayano

AbstractPublic participation has become increasingly necessary to connect a wide range of knowledge and various values to agenda setting, decision-making and policymaking. In this context, deliberative democratic concepts, especially “mini-publics,” are gaining attention. Generally, mini-publics are conducted with randomly selected lay citizens who provide sufficient information to deliberate on issues and form final recommendations. Evaluations are conducted by practitioner researchers and independent researchers, but the results are not standardized. In this study, a systematic review of existing research regarding practices and outcomes of mini-publics was conducted. To analyze 29 papers, the evaluation methodologies were divided into 4 categories of a matrix between the evaluator and evaluated data. The evaluated cases mainly focused on the following two points: (1) how to maintain deliberation quality, and (2) the feasibility of mini-publics. To create a new path to the political decision-making process through mini-publics, it must be demonstrated that mini-publics can contribute to the decision-making process and good-quality deliberations are of concern to policy-makers and experts. Mini-publics are feasible if they can contribute to the political decision-making process and practitioners can evaluate and understand the advantages of mini-publics for each case. For future research, it is important to combine practical case studies and academic research, because few studies have been evaluated by independent researchers.


2004 ◽  
Vol 19 (2) ◽  
pp. 140-148 ◽  
Author(s):  
Kai Reimers

This case describes the experience of a wholly foreign-owned manufacturing company in Tianjin/China regarding the use of its ERP system in its main functional departments, purchasing, production planning, sales/distribution, and finance. The company is part of a group which is a global leader in the manufacturing and distribution of mechanical devices, called gearboxes, that are needed to drive a wide range of facilities such as escalators and baggage conveyor belts in airports. It has entered China in 1995 and the Tianjin manufacturing facility has soon become a hub for the Asian market. The main challenge confronting the management team is to support the breakneck growth rate of this young company. The company's ERP system plays a crucial role in this task. However, it seems that middle managers are frequently hitting an invisible wall when trying to expand the use of the ERP system in order to cope with ever-increasing workloads and coordination tasks. This case serves to illustrate cultural issues implicated in the use of an enterprise wide information system in a medium size company operating in an emerging market economy. In addition, issues of operations management, global management, and organizational behaviour are addressed.


2006 ◽  
pp. 23-30 ◽  
Author(s):  
Milan Vukicevic

One of the specificities of the large-serial and mass production is the almost neglected percentage of prepare-finish time in the production cycle. In the conditions of today dominant discontinuous production, it becomes a significant element of the production cycle. The eastern (Japan) doctrine of increasing the flexibility of the production systems, is based inter alia also on the extreme reduction of the prepare-finish time. For this reason, the aim of this study was to identify the types and percentages of individual jobs within the group of prepare-finish jobs. The sample consisted of 3 (three) production systems for the production of joinery, with the discontinuous production system. The research shows that the percentage of time of the jobs installation of work instruments, regulation of processing regime, and removal of work instruments is extremely long and that it ranges between 11.83% and 18.93% of the shift time. The reasons of the high percentage of these jobs are the wide range of products and the absence of the rationalisation of prepare-finish jobs. Within the efforts to minimize the effects of disruption and to increase the flexibility of the production systems, the rationalisation of prepare-finish jobs is the unavoidable condition.


Author(s):  
Ruzimov Sanjarbek ◽  
Jamshid Mavlonov ◽  
Akmal Mukhitdinov

The paper aims to present an analysis of the component sizes of commercially available vehicles with electrified powertrains. The paper provides insight into how the powertrain components (an internal combustion engine, an electric motor and a battery) of mass production electrified vehicles are sized. The data of wide range of mass production electrified vehicles are collected and analyzed. Firstly, the main requirements to performance of a vehicle are described. The power values to meet the main performance requirements are calculated and compared to the real vehicle data. Based on the calculated values of the power requirements the minimum sizes of the powertrain components are derived. The paper highlights how the sizing methodologies, described in the research literature, are implemented in sizing the powertrain of the commercially available electrified vehicles.


2021 ◽  
Author(s):  
◽  
Edward Johnson

<p><b>The gold mining industry in Ghana is characterised by complexity in terms of its extended/sequential operations, its system-wide reach, its multiple stakeholders, and the variety of formal and informal organisations that constitute the industry. Perceptions of the industry differ considerably amongst stakeholders, depending on their stakes and interests, knowledge, understanding, involvement and agency within or without the sector. Studies of the industry to date have overlooked these diverse viewpoints and used limited-scope, single-frame analyses. However, they have highlighted wide-ranging industry issues that impact the diversity of stakeholders, which could benefit from a fuller and more comprehensive analysis.</b></p> <p>This study addresses this need by adopting a multi-framing systems-based approach. Data was examined and analysed through a variety of systems-based lenses and frames, including a stakeholder analysis (SA) frame, a causal loop modelling (CLM) frame, supply chain analysis (SCA) frame and the Theory of Constraints (TOC) Thinking Processes analytical frames lenses. First the Current Reality Tree (CRT) tool of the Theory of Constraints (TOC) was used to synthesise information from the literature examined, providing an initial provisional CRT model. Interview data was collected by sharing and seeking feedback to the CRT model at multiple levels of the industry, giving voice to stakeholders throughout the sector. Subsequent analysis used all the modelling frameworks mentioned above in a multi-framing analysis.</p> <p>In particular, the evaporating cloud (EC) tool from TOC was used to structure and develop potential solutions to conflict highlighted by the literature review, the SA, SCA and CLM. Building on this, a final CRT was developed, and a goal tree (GT) used to design the desired future whilst employing the future reality tree (FRT) to test the plausibility of solutions from the EC to deliver the desired future. The prerequisite tree (PRT) was then used to identify obstacles and intermediate objectives that must be overcome for successful transition to the desired future.</p> <p>Insights from the research shows a desire by multi-national large scale-gold mining companies and government alike to minimise adverse impacts and maximise the sector’s outcomes for key stakeholders, including those at the community level. However, the research has documented many instances of actions taken to address issues and improve outcomes that have instead resulted in unresolved dilemmas and paradoxes, failing to achieve desired outcomes.</p> <p>A number of factors have been identified as being responsible for these situations. Key amongst them is a limited understanding to deliver desired outcome for stakeholders without compromises, a focus on short-term goals, no collective effort, and arms-length/win-lose relationships amongst the Ghanaian stakeholders of the industry.</p> <p>The study’s concluding findings and results allow decision makers to benefit significantly from the study through its recommendations and showcasing of tools that may allow them to make sound decisions and address endogenous and exogenous cause-effect relationships limiting desirable outcomes from actions taken.</p> <p>Theoretical and knowledge-based contributions are made by conceptualising and offering evidence for three key factors or dimensions that can explain a significant number of issues limiting desirable outcomes for stakeholders of the gold mining industry. These include difficulty to transition from theory (espoused aims) to practice, a relative focus on local optima (silo thinking), poor monitoring (lack of evaluation), and a control culture. Methodological contributions are made by demonstrating the application of a multi-framing approach in a more organic and iterative manner as opposed to its use in a designed sequence, working down through layers of various systemic levels of an industry (in this case, the gold mining industry in Ghana). By so doing, the study builds on and extends the practicality of the multi-framing approach and stimulates further research in the field.</p> <p>In terms of its contribution to practice, the study provides Government, political and mining sector policy decision makers, and other interested actors, with a platform for understanding the sector in order to support their decision making about the industry to ultimately improve outcomes for key stakeholders. In particular, the study allows mining sector policy decision makers and other stakeholders to recognise complexity, uncertainty and conflicts that are embedded in the mining system and in their everyday decision-making activities about the industry. It also allows these stakeholders to become more aware that such issues can be addressed and improved by identifying and focusing on one or few underlying causes.</p> <p>This thesis draws on systems-based frameworks drawn both from functional management, for example, the supply chain and value chain frameworks of operations management and the stakeholder framework of strategic management, and from the broad domain of systems thinking (ST) and systems-based methodologies; and then focuses on the intersection of these frameworks in relation to the gold mining sector in Ghana. Due to the wide range of techniques applied, none are over-explored, creating potential for further research. On the other hand, with regard to explanations, depending on background, practitioners, and researchers familiar with some techniques may consider those sections over-explained. The researcher has sought a balance for the purpose of this study. Whilst limiting the scope of this work has been necessary in the context of doctoral study, topics ripe for future research are set out in the conclusion.</p>


2011 ◽  
Vol 32 (1) ◽  
pp. 5-9
Author(s):  
Nathan Glazer

Daniel Bell, the distinguished and influential American sociologist and social theorist, died at the age of 91 years in January, 2011. Bell had an amazingly wide range of interests and knowledge. While he could be called a sociologist—he had served as a professor of sociology at Columbia University, and then as Henry Ford II Professor of Sociology at Harvard University—his academic life came after a long and varied career in serious journalism, as managing editor of the socialist weekly The New Leader, as editor of Common Sense, and as an editor and writer on the American business magazine Fortune. He also founded, with Irving Kristol, and edited for some years, the influential American quarterly The Public Interest.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mikihisa Nakano ◽  
Kazuki Matsuyama

Purpose The purpose of this paper is to discuss the roles of a supply chain management (SCM) department. To achieve that, this study empirically examines the relationship between internal supply chain structure and operational performance, using survey data collected from 108 Japanese manufacturers. Design/methodology/approach Based on a literature review of not only organizational theory but also other fields such as marketing, logistics management, operations management and SCM, this study focused on two structural properties, formalization and centralization and divided operational performance to firm-centric efficiency and customer-centric responsiveness. To examine the analytical model using these dimensions, this study conducted a structural equation modeling. Findings The correlation between centralization of operational tasks and centralization of strategic tasks, the impacts of centralization of both tasks on formalization and the effect of formalization on responsiveness performance were demonstrated. In addition, the reasons for formalization not positively influencing efficiency performance were explored through follow-up interviews. Practical implications Manufacturers need to formalize, as much as possible, a wide range of SCM tasks to realize operational excellence. To establish such formalized working methods, it is effective to centralize the authorities of both operational and strategic tasks in a particular department. In addition, inefficiency due to strict logistics service levels is a problem that all players involved in the supply chain of various industries should work together to solve. Originality/value The theoretical contribution of this study is that the authors established an empirical process that redefined the constructs of formalization and centralization, developed these measures and examined the impacts of these structural properties on operational performance.


Micromachines ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 135 ◽  
Author(s):  
Charmet ◽  
Rodrigues ◽  
Yildirim ◽  
Challa ◽  
Roberts ◽  
...  

Microsystems are key enabling technologies, with applications found in almost every industrial field, including in vitro diagnostic, energy harvesting, automotive, telecommunication, drug screening, etc. Microsystems, such as microsensors and actuators, are typically made up of components below 1000 microns in size that can be manufactured at low unit cost through mass-production. Yet, their development for commercial or educational purposes has typically been limited to specialized laboratories in upper-income countries due to the initial investment costs associated with the microfabrication equipment and processes. However, recent technological advances have enabled the development of low-cost microfabrication tools. In this paper, we describe a range of low-cost approaches and equipment (below £1000), developed or adapted and implemented in our laboratories. We describe processes including photolithography, micromilling, 3D printing, xurography and screen-printing used for the microfabrication of structural and functional materials. The processes that can be used to shape a range of materials with sub-millimetre feature sizes are demonstrated here in the context of lab-on-chips, but they can be adapted for other applications. We anticipate that this paper, which will enable researchers to build a low-cost microfabrication toolbox in a wide range of settings, will spark a new interest in microsystems.


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