W.B. Heginbotham, M. Dooner and K. Case
This paper represents a continuation of the earlier work as reported in Refs. More realism has been achieved and an increasing number of basic robots and “building blocks” have…
Abstract
This paper represents a continuation of the earlier work as reported in Refs. More realism has been achieved and an increasing number of basic robots and “building blocks” have been developed. The rapidity with which Robot/ Workplace situations can be analyzed and performances evaluated ensures that this method is a practical tool for assisting the exploitation and promotion of Industrial Robot Technology.
James M.J. Cheng, John E.L. Simmons and ames M. Ritchie
Flexibility is widely recognized, in research literature and in more popular publications, as being of crucial importance in manufacturing. However, there is evidence of confusion…
Abstract
Flexibility is widely recognized, in research literature and in more popular publications, as being of crucial importance in manufacturing. However, there is evidence of confusion among the numerous definitions of flexibility and it is arguable that, even now, the concept is not well understood. Furthermore, there is no simple approach for the systematic incorporation of flexibility level by level within the hierarchy of a conventional manufacturing system. Introduces a unifying and simple set of concepts for flexibility from a management perspective. The purpose of this “capability and capacity” approach is to interpret and integrate various types of flexibility throughout the manufacturing system. Use of this approach leads to four important principles for the integration of a system’s overall flexibility. Analyses flexibility types within manufacturing using the proposed approach.
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E. Appleton, W.B. Heginbotham and D. Law
This paper surveys the work on robot forging which has been taking place at the University of Nottingham over the last two years, initially using a Versatran D301 as a base for a…
Abstract
This paper surveys the work on robot forging which has been taking place at the University of Nottingham over the last two years, initially using a Versatran D301 as a base for a feasibility study. Also it seeks to describe and put into perspective the current work using an A.S.E.A. robot and introduce intended future developments, particularly those related to computer control.
Based on case studies collected at two UK factories, the issueswhich arise during JIT implementation are examined. These cases showthat the changes involved in a move towards JIT…
Abstract
Based on case studies collected at two UK factories, the issues which arise during JIT implementation are examined. These cases show that the changes involved in a move towards JIT have a political dimension. The implication is drawn that, in implementing a JIT system, production managers need to consider the strategic aspects of the change as much as they do the machines and materials aspects. An equally strategic approach to human resource management is indicated.
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Industrial robots bear little resemblance to the science fiction concept of futuristic machines — they are little more than machine tools except that their prime function is…
Abstract
Industrial robots bear little resemblance to the science fiction concept of futuristic machines — they are little more than machine tools except that their prime function is handling not making components. Being designed to replace a human operator, many of the machines currently available are somewhat similar in scale to a human being although their continuous weight lifting abilities can be much in excess of a human. They generally have one manipulating arm and there are three classical types of robot architecture:
C.E.R. Wainwright and N. Bateman
Suggests that there is a need to develop a process to enable manufacturing managers to formulate and implement effective manufacturing strategies. Describes research aimed at…
Abstract
Suggests that there is a need to develop a process to enable manufacturing managers to formulate and implement effective manufacturing strategies. Describes research aimed at identifying those characteristics of manufacturing strategy formulation performance measures which were considered by practitioners to lead to successful creation of strategies. Proposes a viable tool which can help businesses to identify current levels of flexibility, hence enabling them to improve manufacturing flexibility in accordance with strategic objectives.
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Reports some of the findings of two years′ research work carried outwithin a number of manufacturing engineering companies both in theUnited Kingdom and Brazil. All the companies…
Abstract
Reports some of the findings of two years′ research work carried out within a number of manufacturing engineering companies both in the United Kingdom and Brazil. All the companies belong to the automotive industry. The objective of the overall research was to analyse the relationships between the variables of uncertainty, variability of outputs and flexibility in manufacturing systems. The findings are a co‐product of the overall research and are related to the flexibility of the structural (human and technological) manufacturing resources. Derives a new way of looking at stocks and its role in the manufacturing system′s flexibility.
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Monty Sutrisna and Jack Goulding
Following the increasing need for faster construction, improved quality and evidence value propositions, offsite construction is increasingly being proffered as a viable contender…
Abstract
Purpose
Following the increasing need for faster construction, improved quality and evidence value propositions, offsite construction is increasingly being proffered as a viable contender to “traditional” construction approaches. However, whilst evidence supports the move towards offsite, its uptake has been lower than expected. Whilst the precise reasons for this seem to be influenced by a number of issues, including contextual drivers and market maturity; some project stakeholders also view offsite as carrying greater risks. The purpose of this paper is to report on the quality of information flow, in particular, the impact and influence of this on design risks in offsite construction projects.
Design/methodology/approach
An existing design risk framework is used as the point of departure for this research. This is further expanded into a specific model for evaluating offsite construction projects design risks, the rubrics of which were informed by two case studies of offsite construction projects in Australia and the UK analysed with a process-tracing technique. Whilst these cases were geographically separated, the constructs were aligned to uncover fundamental design information requirements and concomitant risks associated with offsite.
Findings
The findings of the research reported in this paper include the crucial information feeding into the design process emanating from the lifecycle of offsite construction projects, namely, design, offsite (manufacturing), handling and transporting, site works and installation and also occupancy. These are contextualised within the four categories, namely, client requirements, project requirements, regulation aspects and social aspects and the final outcomes were summarised into a holistic diagram.
Originality/value
Given that the offsite construction has shifted the working paradigm into assigning a significant level of efforts and emphasis at the front end of the construction projects, the importance of its design process and hence design risks management has gone up significantly in construction projects delivered using this technique. This research and paper contributes significantly to the built environment domain by identifying the crucial aspects along the project lifecycle to be considered to minimise the potential occurrence of design risks and hence increasing the confidence of project stakeholders in adopting offsite construction techniques in their projects.
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Bartosz Ziegler, Jędrzej Mosiężny and Paweł Czyżewski
The aim of this study is to identify key factors limiting efficiency of pumped heat energy storage systems and determine some general features of transient behavior of solid…
Abstract
Purpose
The aim of this study is to identify key factors limiting efficiency of pumped heat energy storage systems and determine some general features of transient behavior of solid state, sensible heat storages. Moreover, it aimed at establishing a feasible approach to transient conjugate heat transfer (CHT) analyses for such applications.
Design/methodology/approach
A zero-dimensional analytical model is used to determine the system efficiency sensitivity to efficiency of its components. Analysis of argon gas flow in an exemplary configuration of layered bed thermal energy storage is presented. The analysis incorporates a unsteady reynolds averaged navier stokes model with conjugate heat transfer between gas and solid storage core.
Findings
It is established that exergetic efficiency of the heat storage is one of the key factors for the system’s overall performance. Three full cycles of storage charging and discharging having 17 h physical time in total are simulated, with calculation of exergetic efficiency for each of the cycles. From standpoint of the system efficiency, it is concluded that the presented heat storage kind has limited exergetic efficiency because of severe temperature drop at the solid–fluid interface in comparison to granular kind of heat storage devices. From the methodological standpoint, it is concluded that calculating the exergetic efficiency of the heat storage by direct computational fluid dynamics (CFD) analysis requires significant amount of walltime and computational resources.
Originality/value
The paper presents unconventional approach to using standard CFD tools by exploiting numerical diffusion to numerically suppress high-frequency solution oscillations. This strategy grants that the analysis, otherwise requiring impractically long computation walltime, is completed within a practical time.
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Laxmi Gupta, Bishal Dey Sarkar and Ravi Shankar
This study aims to address the critical need for innovation in the power grid sector, driven by global carbon reduction commitments. It highlights the pivotal role of critical…
Abstract
Purpose
This study aims to address the critical need for innovation in the power grid sector, driven by global carbon reduction commitments. It highlights the pivotal role of critical success factors (CSFs) in enhancing system adaptability and environmental mitigation within India’s power industry.
Design/methodology/approach
This research is grounded on transition management theory to identify and validate the CSFs necessary to integrate energy storage systems (ESS). Here, exploratory factor analysis (EFA) and total interpretive structural modeling (TISM) are integrated to evaluate the model’s effectiveness in reducing CO2 emissions while ensuring grid stability and flexibility.
Findings
The research develops a seven-level hierarchical model illustrating the interaction of ESS components for a stable power grid, clean energy and a profitable electric industry. It emphasizes the strategic significance of managing key factors to reduce CO2 emissions and ensure grid stability. The study recommends continuous monitoring at tactical and operational levels to enhance overall performance.
Research limitations/implications
The study provides policymakers with strategic insights for the successful implementation of smart grid initiatives, facilitating effective decarbonization of the electricity industry. Additionally, it offers a comprehensive framework for minimizing the environmental impact associated with electricity generation, thereby enhancing overall operational sustainability and efficiency.
Originality/value
The originality of this study lies in its integration of EFA and TISM for robust model assessment and the application of transition management theory to identify and validate CSFs in the integration of ESS. This approach offers a novel perspective on enhancing the sustainability and efficiency of power grids.