| 1. |
- Adane, Tigist Fetene, et al.
(författare)
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System dynamics analysis of energy usage: Case studies in automotive manufacturing
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591 .- 1750-0605. ; 9:2, s. 131-156
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Tidskriftsartikel (refereegranskat)abstract
- Our life is strongly linked with the usage of natural resources. With increase in world population and welfare there is an increasing global demand for raw material. Energy is a necessity in everyday life and is often generated using non-renewable natural resources which are finite. Manufacturing is one of the largest energy and material resource consumers. There is great concern about minimising consumption of energy in manufacturing industry to sustain the natural carrying capacity of the ecosystem. This is one of the challenges in today’s industrial world. The paper presents the application of system dynamics theory for modelling and simulation of complex manufacturing processes. The simulations help to understand the intricate nature of the interrelation of process parameter and to make sound decision about minimising the energy losses. Two case studies are presented, one in cylinder head casting processes and the other in crankshaft machining. The developed models provide an insight into how to select critical operations and to identify the effect of various parameters on the energy consumption. Also, the models help to understand how changes of parameters over time affect the behaviour of energy changes. The outcome of this research enables the company to identify potential avenues to minimise energy usage and offers a decision support tool.
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| 2. |
- Ahlskog, Mats, 1970-, et al.
(författare)
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Approaching digital transformation in the manufacturing industry challenges and differing views
- 2023
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Ingår i: International Journal of Manufacturing Research. - 1750-0591 .- 1750-0605. ; :4, s. 415-433
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Tidskriftsartikel (refereegranskat)abstract
- In order to support manufacturing companies in their digital transformation, challenges and views of the term 'digital transformation' need to be identified since digital transformation is considered a source of competitive advantages. Therefore, this paper aims to explore the challenges and differing views of digital transformation in the manufacturing industry. A case study was conducted in collaboration with four Swedish manufacturing companies. The results were then mapped into categories of three dimensions (people, process and technology), indicating that digital transformation can have different meanings within a company. We conclude that the term 'digitalisation' is more frequently used in the manufacturing industry than 'digital transformation' and identified challenges relate to lack of best practice for digital transformation, degree of standardisation and therefore affects the workload and limits the possibilities of transferring technical solutions between factories. Our findings are relevant to operations managers and other interested in digital transformation.
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| 3. |
- Bi, Z.M., et al.
(författare)
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Current Status of Reconfigurable Assembly Systems
- 2007
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Ingår i: International Journal of Manufacturing Research. - : InderScience Publishers. - 1750-0591 .- 1750-0605. ; 2:3, s. 303-328
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Tidskriftsartikel (refereegranskat)abstract
- Reconfigurable Manufacturing System (RMS) is one of most promising paradigms that provide an effective solution to changes and uncertainties in a competitive manufacturing environment. A Reconfigurable Assembly System (RAS) is a key component of an RMS. In this paper, our survey on the development of RAS has been summarised. The objectives of this literature survey are to: clarify the needs and drivers in developing reconfigurable assembly systems identify both academic and practical issues critical to the development of reconfigurable assembly systems understand the state of the art of R&D related to the studies on the critical issues reveal the future research directions, which are mostly beneficial to manufacturing industries.
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| 4. |
- Danielsson, Oscar, 1982-, et al.
(författare)
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Integration of Augmented Reality Smart Glasses as Assembly Support : A Framework Implementation in a Quick Evaluation Tool
- 2023
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Ingår i: International Journal of Manufacturing Research. - : InderScience Publishers. - 1750-0591 .- 1750-0605. ; 18:2, s. 144-164
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Tidskriftsartikel (refereegranskat)abstract
- Augmented reality smart glasses (ARSG) have been successfully used as operator support in production. However, their use is not yet widespread, likely in part due to a lack of knowledge about how to integrate ARSG into production. This lack of knowledge can also make it hard to estimate whether this is a worthwhile investment. Our solution is to provide an online evaluation tool to help production planners estimate the likelihood that ARSG will be worth the investment cost in specific production cases. Based on a strawman design, multiple design iterations were followed by a pilot test performed by participants from different manufacturing companies involved in planning production for operators. A Likert scale survey was used to evaluate the tool. The results show a slightly positive evaluation of the tool with suggestions for improvement, including widening the scope and granularity of the tool. Future works include further iterations and case studies.
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| 5. |
- Flores-García, Erik, et al.
(författare)
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What guides information consensus? Approaching the reduction of equivocality in process innovations
- 2020
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Ingår i: International Journal of Manufacturing Research IJMR. - 1750-0591 .- 1750-0605. ; 15:1, s. 73-89
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Tidskriftsartikel (refereegranskat)abstract
- This study investigates the achievement of information consensus and the reduction of equivocality in process innovations. Drawing on the operations management literature, a new framework to guide information consensus in the reduction of equivocality in process innovations is proposed. The analysis is based on a real-time case study in the heavy vehicle industry. The results show that information consensus is not achieved by a single event, but active work towards this goal is necessary, and a clear set of pre-requisites is needed for achieving information consensus. The concepts of strategic objective, decision areas, and external and internal fit are identified as pre-requisites for achieving information consensus about the purpose, characteristics, and functionalities of process innovations.
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| 6. |
- Gustavsson, Patrik, 1988-, et al.
(författare)
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Virtual reality platform for design and evaluation of human-robot collaboration in assembly manufacturing
- 2023
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Ingår i: International Journal of Manufacturing Research. - : InderScience Publishers. - 1750-0591 .- 1750-0605. ; 18:1, s. 28-49
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents 'virtual collaborative robot', a virtual reality platform for designing and evaluating collaboration between operators and industrial robots. Within the platform, human-robot collaboration scenarios can be created and a user can interact with a robot without the safety risks that might arise with physical industrial robots. In an initial evaluation of the platform a scenario was implemented combining speech recognition, haptic control, and augmented reality to assemble a car model. The results from this evaluation indicate that the suggested platform can be used to successfully test new applications with the standard equipment of virtual reality headsets.
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| 7. |
- Hilletofth, Per, et al.
(författare)
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Two sides of a token : coordinating demand and supply at furniture wholesaler
- 2012
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Ingår i: International Journal of Manufacturing Research. - : Inderscience Publishers. - 1750-0591 .- 1750-0605. ; 7:2, s. 101-122
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Tidskriftsartikel (refereegranskat)abstract
- This research work investigates the occurrence of Demand-Supply Chain Management (DSCM) components in a Swedish furniture wholesaler that sources most of its products from China. Three of the eight main components of DSCM were identified in the case company and one component was not fully applicable. The case shows possible caveats of being demand-driven and highlights the need to balance demand and supply sides simultaneously. During economic crisis years 2008-2009, business has experienced extraordinary decline in sales and profitability, while holding considerable amount of inventory at hand. In the long term, supply chain strategy relying on Chinese manufacturing could face increasing challenges in total costs owing to currency changes, transportation costs increase and environmental regulation.
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| 8. |
- Lidberg, Simon, MSc. 1986-, et al.
(författare)
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Reproducible decision support for industrial decision making using a knowledge extraction platform on multi-objective optimization data
- 2023
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Ingår i: International Journal of Manufacturing Research. - : InderScience Publishers. - 1750-0591 .- 1750-0605. ; 18:4, s. 454-480
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Tidskriftsartikel (refereegranskat)abstract
- Simulation-based optimisation enables companies to take decisions based on data, and allows prescriptive analysis of current and future production scenarios, creating a competitive edge. However, effectively visualising and extracting knowledge from the vast amounts of data generated by many-objective optimisation algorithms can be challenging. We present an open-source, web-based application in the R language to extract knowledge from data generated from simulation-based optimisation. For the tool to be useful for real-world industrial decision-making support, several decision makers gave their requirements for such a tool. This information was used to augment the tool to provide the desired features for decision support in the industry. The open-source tool is then used to extract knowledge from two industrial use cases. Furthermore, we discuss future work, including planned additions to the open-source tool and the exploration of automatic model generation.
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| 9. |
- Mark, Andreas, 1980, et al.
(författare)
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Optimisation of Robotised Sealing Stations in Paint Shops by Process Simulation and Automatic Path Planning
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591 .- 1750-0605. ; 9:1, s. 4-26
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Tidskriftsartikel (refereegranskat)abstract
- Application of sealing materials is done in order to prevent water leakage into cavities of the car body, and to reduce noise. The complexity of the sealing spray process is characterised by multi-phase and free surface flows,multi-scale phenomena, and large moving geometries, which poses great challenges for mathematical modelling and simulation. The aim of this paper is to present a novel framework that includes detailed process simulation andautomatic generation of collision free robot paths. To verify the simulations, the resulting width, thickness and shape of applied material on test plates as a function of time and spraying distance have been compared to experiments. The agreement is in general very good. The efficient implementation makes it possible to simulate application of one meter of sealing material in less than anhour on a standard computer, and it is therefore feasible to include such detailed simulations in the production preparation process and off-line programming of the sealing robots.
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| 10. |
- Mattsson, Sandra, 1984, et al.
(författare)
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Comparing quantifiable methods to measure complexity in assembly
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591 .- 1750-0605. ; 9:1, s. 112-130
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Tidskriftsartikel (refereegranskat)abstract
- In order to measure complexity and stay competitive, manufacturing companies need to be able to quantify production complexity. For this reason, two methods were developed within the context of two concurrent research projects are compared: the Belgian Complexity Calculator, CXC, measures objective complexity and the Swedish Complexity Index, CXI, focuses on subjective complexity, as experienced by operators in the stations. This paper presents a comparative analysis of the two methods by comparing them to seven relevant existing quantitative methods and by examining results from case studies. It is observed that the two methods can be used as a compliment to one another, where CXC can be used for scanning data automatically CXI can be used for in-depth analysis. In addition, the comparison of existing methods provides insight on how to measure complexity depending on need and scope.
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