| 1. |
- Abdullah Asif, Farazee Mohammad, 1980-, et al.
(författare)
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A practical ICT framework for transition to circular manufacturing systems
- 2018
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Ingår i: Procedia CIRP. - : Elsevier. - 2212-8271. ; , s. 598-602
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Konferensbidrag (refereegranskat)abstract
- The transition towards a circular economy has become important. Manufacturing industry being a major stakeholder in this transition has started exploring the potential of this transition and challenges in implementation. Ambitious companies such as Gorenje d.d. has taken the circular economy transition seriously and aims to become a pioneer in implementing circular manufacturing systems. One vital step in this transition is the business model shift from the linear (sales model) to a circular model such as 'product as a service'. This brings new challenges to Original Equipment Manufacturers (OEMs) that have never been experienced in their conventional businesses. One of the challenges is to establish an information communication and technology (ICT) infrastructure that enables information management and sharing as well as establishes a real-time communication between relevant stakeholders. Outlining such an ICT infrastructure is the objective of this paper.
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| 2. |
- Amir, Saman, et al.
(författare)
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Toward a Circular Economy: A Guiding Framework for Circular Supply Chain Implementation
- 2024. - 2
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Ingår i: Sustainable Supply Chains. - Cham : Springer International Publishing. - 2365-6395. - 9783031455650 - 3031455657 - 3031455649 - 9783031455643 ; , s. 379-404
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- This chapter presents a guiding framework for circular economy implementation in supply chains. Closing the loop for resource efficiency is a well-known practice in the industry. To concretize the circular economy implementation strategies, closed-loop thinking requires innovation and adaptation. Circular supply chains (CSCs) are one of the key enablers in closing the loop by design or intention for value recovery and profit maximization. CSC is an emerging area, and the view of CSC where forward and reverse supply chain is seamlessly integrated with the overall aim to achieve system-wide circularity is missing in the academic debate. By offering a cross-functional and systemic perspective of circular supply chains, we present a guiding framework to structure and understand the underlying complexities and highlight the crucial elements of circular supply chain implementation. The framework categorizes the circular supply chain into four building blocks: systemic approach, main drivers, levels of decision making, and mechanisms to manage the full loop closure and minimize the inherent uncertainties of a complex system. We conclude the chapter by illustrating the applicability of the circular supply chain framework using two industrial cases that are transitioning toward the circular economy.
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| 3. |
- Amir, Saman, et al.
(författare)
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Toward a Circular Economy: A Guiding Framework for Circular Supply Chain Implementation
- 2024
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Ingår i: Springer Series in Supply Chain Management. - Cham : Springer Nature. ; , s. 379-404, s. 379-404
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Bokkapitel (refereegranskat)abstract
- This chapter presents a guiding framework for circular economy implementation in supply chains. Closing the loop for resource efficiency is a well-known practice in the industry. To concretize the circular economy implementation strategies, closed-loop thinking requires innovation and adaptation. Circular supply chains (CSCs) are one of the key enablers in closing the loop by design or intention for value recovery and profit maximization. CSC is an emerging area, and the view of CSC where forward and reverse supply chain is seamlessly integrated with the overall aim to achieve system-wide circularity is missing in the academic debate. By offering a cross-functional and systemic perspective of circular supply chains, we present a guiding framework to structure and understand the underlying complexities and highlight the crucial elements of circular supply chain implementation. The framework categorizes the circular supply chain into four building blocks: systemic approach, main drivers, levels of decision making, and mechanisms to manage the full loop closure and minimize the inherent uncertainties of a complex system. We conclude the chapter by illustrating the applicability of the circular supply chain framework using two industrial cases that are transitioning toward the circular economy.
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| 4. |
- Amir, Saman, et al.
(författare)
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Towards Circular Economy : Enhanced Decision-Making in Circular Manufacturing Systems
- 2021. - 1
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Ingår i: Sustainable Consumption and Production, Volume II. - Cham : Palgrave Macmillan. ; 2, s. 257-279
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Bokkapitel (refereegranskat)abstract
- This chapter will present an outlook on the modelling and simulation of circular manufacturing systems. Simulations in the linear context have long been an enabler in making the systems efficient through better design and improved decision-making. Circular aspects of manufacturing systems lead to another level of complexity to be tackled and understood in terms of the performance of the system from an economic, environmental and social perspective. This calls for enhanced understanding through analysis of the interdependencies between business models, product design, supply chains and consumption patterns interactions by modelling the effect of those interactions to provide a sound basis for decision-making. The role of modelling simulation for prediction and improved decision-making in complex situations will be presented and exemplified with case studies where simulation has been used as a tool to enhance decision-making. The chapter finishes by highlighting the potential of modelling and simulation in boosting the transition towards circular systems implementation.
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| 5. |
- Amir, Saman, et al.
(författare)
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Towards circular economy : A guiding framework for circular supply chain implementation
- 2022
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Ingår i: Business Strategy and the Environment. - : Wiley. - 0964-4733 .- 1099-0836.
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Tidskriftsartikel (refereegranskat)abstract
- Closing the loop for resource efficiency is a well-known practice in the industry. Toconcretize the circular economy implementation strategies, closed-loop thinkingrequires innovation and adaptation. Circular supply chains (CSCs) are one of the keyenablers in closing the loop by design or intention for value recovery and profit maxi-mization. CSC is an emerging area, and the view of CSC where forward and reversesupply chain is seamlessly integrated with the overall aim to achieve system-wide cir-cularity is missing in the academic debate. By offering a cross-functional perspectiveof CSC, this paper presents a CSC guiding framework to structure and understandthe underlying complexities and highlight the crucial elements of the CSC implemen-tation. Thus, this framework lays the basis for CSC within the systemic implementa-tion of CE by closing the loop by design or intention. The framework categorizes theCSC into four building blocks, namely, systemic approach, main drivers, levels of deci-sion making, and mechanisms to manage the full loop closure and minimize the inher-ent uncertainties of a complex system. The building blocks of the framework aresynthesized from various streams of supply chain literature and recurring concepts inthe circular economy literature. The CSC framework applicability is illustrated usingtwo industrial cases that are transitioning towards the circular economy.
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| 6. |
- de Giorgio, Andrea, Dr Eng., et al.
(författare)
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Assessing the influence of expert video aid on assembly learning curves
- 2021
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Tidskriftsartikel (refereegranskat)abstract
- Since the introduction of the concept of learning curves in manufacturing, many articles have been applying the model to study learning phenomena. In assembly, several studies present a learning curve when an operator is trained over a new assembly task; however, when comparisons are made between learning curves corresponding to different training methods, unaware researchers can show misleading results. Often, these studies neglect either or both the stochastic nature of the learning curves produced by several operators under experimental conditions, and the high correlation of the experimental samples collected from each operator that constitute one learning curve. Furthermore, recent studies are testing newer technologies, such as assembly animations or augmented reality, to provide assembly aid, but they fail to observe deeper implications on how these digital training methods truly influence the learning curves of the operators. This article proposes a novel statistical study of the influence of expert video aid on the learning curves in terms of assembly time by means of functional analysis of variance (FANOVA). This method is better suited to compare learning curves than common analysis of variance (ANOVA), due to correlated data, or graphical comparisons, due to the stochastic nature of the aggregated learning curves. The results show that two main effects of the expert video aid influence the learning curves: one in the transient and another in the steady state of the learning curve. The transient effect of the expert video aid, where the statistical tests suffer from a high variance in the data, appears to be a reduction in terms of assembly time for the first assemblies: the operators seem to benefit from the expert video aid. As soon as the steady state is reached, a slower and statistically significant effect appears to favor the learning processes of the operators who do not receive any training aid. Since the steady state of the learning curves represents the long term production efficiency of the operators, the latter effect might require more attention from industry and researchers.
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| 7. |
- de Giorgio, Andrea, Dr Eng., et al.
(författare)
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Assessing the influence of expert video aid on assembly learning curves
- 2022
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Ingår i: Journal of manufacturing systems. - : Elsevier BV. - 0278-6125 .- 1878-6642. ; 62, s. 263-269
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Tidskriftsartikel (refereegranskat)abstract
- Since the introduction of the concept of learning curves in manufacturing, many articles have been applying the model to study learning phenomena. In assembly, several studies present a learning curve when an operator is trained over a new assembly task; however, when comparisons are made between learning curves corresponding to different training methods, unaware researchers can show misleading results. Often, these studies neglect either or both the stochastic nature of the learning curves produced by several operators under experimental conditions, and the high correlation of the experimental samples collected from each operator that constitute one learning curve. Furthermore, recent studies are testing newer technologies, such as assembly animations or augmented reality, to provide assembly aid, but they fail to observe deeper implications on how these digital training methods truly influence the learning curves of the operators. This article proposes a novel statistical study of the influence of expert video aid on the learning curves in terms of assembly time by means of functional analysis of variance (FANOVA). This method is better suited to compare learning curves than common analysis of variance (ANOVA), due to correlated data, or graphical comparisons, due to the stochastic nature of the aggregated learning curves. The results show that two main effects of the expert video aid influence the learning curves: one in the transient and another in the steady state of the learning curve. The transient effect of the expert video aid, where the statistical tests suffer from a high variance in the data, appears to be a reduction in terms of assembly time for the first assemblies: the operators seem to benefit from the expert video aid. As soon as the steady state is reached, a slower and statistically significant effect appears to favor the learning processes of the operators who do not receive any training aid. Since the steady state of the learning curves represents the long term production efficiency of the operators, the latter effect might require more attention from industry and researchers.
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| 8. |
- de Giorgio, Andrea, Dr Eng., et al.
(författare)
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Measuring the effect of automatically authored video aid on assembly time for procedural knowledge transfer among operators in adaptive assembly stations
- 2021
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Ingår i: International Journal of Production Research. - : Informa UK Limited. - 0020-7543 .- 1366-588X.
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Tidskriftsartikel (refereegranskat)abstract
- Can automatically-authored videos of industrial operators help other operators to learn procedural tasks? This question is relevant to the advent of the industrial internet of things (IIoT) and Industry 4.0, where smart machines to help human operators rather than replacing them, in order to benefit from the best of humans and machines. The study considers an industrial ecosystem where procedural knowledge (PK) is quickly and effectively transferred from one operator to another. Assembly tasks are procedural in nature and present a certain complexity that still does not allow machines and their sensors to capture all the details of the operations. Especially if the assembly operation is adaptive and not fixed in terms of assembly sequence plan. In order to help the operators, videos of other operators executing the complex procedural tasks can be automatically recorded and authored from machines. This study shows by means of statistical design and analysis of experiments that expert aid, provided before each subassembly, can reduce the assembly time of an untrained operator, whereas automatically authored video aids can transfer PK but producing an opposite effect on the assembly time. Therefore, hybrid training methods are still necessary and trade-offs have to be considered. Managerial insights from the results suggest an unneglectable impact of the choice to digitize industrial operations too early. The experimental studies presented can act as guidelines for the correct statistical testing of innovative solutions in industry.
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| 9. |
- Kokare, Samruddha, et al.
(författare)
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A comparative life cycle assessment of stretchable and rigid electronics : a case study of cardiac monitoring devices
- 2021
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Ingår i: International Journal of Environmental Science and Technology. - : Springer Nature. - 1735-1472 .- 1735-2630.
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Tidskriftsartikel (refereegranskat)abstract
- Stretchable electronics is a new innovation and becoming popular in various fields, especially in the healthcare sector. Since stretchable electronics use less printed circuit boards (PCBs), it is expected that the environmental performance of a stretchable electronics-based device is better than a rigid electronics-based device that provides the same functionalities. Yet, such a study is rarely available. Thus, the main purpose of this research is to perform a comparative life cycle analysis of stretchable and rigid electronics-based devices. This research combines both the case study approach and the research review approach. For the case study, a cardiac monitoring device with both stretchable and rigid electronics is used. The ISO 14044:2006 standard's prescribed LCA approach and ReCiPe 2016 Midpoint (Hierarchist) are followed for the impact assessment using the SimaPro 9.1 software. The LCA results show that the stretchable cardiac monitoring device has better environmental performance in all eighteen impact categories. This research also shows that the manufacturing process of stretchable electronics has lower environmental impacts than those for rigid electronics. The main reasons for the improved environmental performance of stretchable electronics are lower consumption of raw material as well as decreased energy consumption during manufacturing. Based on the LCA results of a cardiac monitoring device, the study concludes that stretchable electronics and their manufacturing process have better environmental performance in comparison with the rigid electronics and their manufacturing process.
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| 10. |
- Roci, Malvina, et al.
(författare)
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A methodological approach to design products for multiple lifecycles in the context of circular manufacturing systems
- 2021
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Ingår i: Journal of Cleaner Production. - : Elsevier. - 0959-6526 .- 1879-1786. ; 296, s. 126534-
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Tidskriftsartikel (refereegranskat)abstract
- It is estimated that the adaptation of the Circular Economy approach can yield material cost savings of hundreds of billions of dollars per year for the EU and can result in huge environmental benefits. To tap this potential, the manufacturing industry needs to take a circular approach, where the products are designed intentionally to be used for multiple lifecycles. However, there is a lack of methodologies to date that can support such an approach. To fill this gap, this research has proposed a novel methodological approach that can support designing products for multiple lifecycles to keep the products as well as the components and the materials at their highest utility and value at all times. This research has identified that there is a strong synergy among the concepts of product design strategies, product obsolescence and product end-of-life options. Taking this synergy as the foundation and adopting modular architectures in the product design and development process, lifecycle planning can be performed for products that will sustain multiple lifecycles. This research is performed in two steps: first, the research review process is used to explore the knowledge base in the field of product design methodologies and based on the insights from the literature a novel methodological approach is proposed; second, a case example is used to demonstrate the applicability and effectiveness of the proposed methodological approach.
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