Rasmus Andersen - Academia.edu (original) (raw)
Papers by Rasmus Andersen
International Journal of Production Research, 2022
A service check for a farm is an interesting new way of advising farmers, which has proven very s... more A service check for a farm is an interesting new way of advising farmers, which has proven very successful. The objective of a service check is to recognise potential improvements in the production using a holistic approach. Often a service check will try to establish the overall goals for the farmer's family, the farmer and the farm. In order to do so, the farm is systematically analysed in order to establish strengths, weaknesses and possible paths of development. These issues are normally neglected in the day-today contact between the farmer and the usual adviser, and even far-reaching decisions are often taken without a decent analysis of the strategic goals. A service check involves a joint visit, where two experienced advisors visit the farm together. The advisors are normally an economic advisor and either a pig or cattle advisor, depending on the farm analysed. Usually, the farm's normal advisors are not participating in the service check. The advisors bring an analy...
Towards Sustainable Customization: Bridging Smart Products and Manufacturing Systems, 2021
Increased product variety, shorter product life cycles and smaller production batches are market ... more Increased product variety, shorter product life cycles and smaller production batches are market conditions faced by manufacturers in both discrete and process industries. Consequently, attention has been given to complexity management techniques, such as product platforms and product modularity. Nevertheless, literature examples of product platforms are almost exclusively provided for discrete products, indicating a lacking body of knowledge on the subject for process industrial products. This study, therefore, applies existing methods for platform-based development in the process industry, which have previously only been demonstrated for discrete products. The methodology used in this paper is Modular Function Deployment developed by Erixon in the 1990s and is applied on a product group in a Danish company in the process industry. The evidence presented suggests that there may be value in investigating the applicability of existing methods for designing product platforms in the process industry, and that these methods may prove a starting ground for further development of methods tailored to this industry.
The initial issue of complexity management in companies is the identification of the drivers of c... more The initial issue of complexity management in companies is the identification of the drivers of complexity. However, current literature lacks methods for assisting practitioners in the initial identification of such drivers. This paper, therefore, presents a novel framework for assisting practitioners with identifying complexity drivers in manufacturing companies. The framework uses a generic value chain and a generic product structure as its two dimensions. Multiple workshops are then conducted with company representatives across different value chain fields focusing on two main parts: First, surveys are used to assign complexity ratings to different generic product structure elements. Secondly, the complexity ratings are elaborated on by workshop participants. The process provides valuable insights into the perceived complexity drivers. The framework is then verified through a case study in the process industry. Based on the case study, multiple complexity drivers were identified ...
The business strategy of Mass Customization, enabled by e.g. Reconfigurable Manufacturing and Cha... more The business strategy of Mass Customization, enabled by e.g. Reconfigurable Manufacturing and Changeable Manufacturing is based on the fundamental premise; to achieve high operational efficiency, while producing high-variety products in small batches and with short product-life cycle of the unique products. To efficiently achieve this premise in manufacturing systems, all levels of changeability must be addressed. This paper investigates a fundamental sub-set of this changeability, which has not been addressed comprehensively by academia; the human changeover ability on workstation level. Based on a literature review, this paper identifies seven human related challenges which must be addressed to be able to manage high-variety and low-volume efficiently on a changeover ability level. This leads to a subsequent literature review that aims at investigating possible approaches and solutions for the identified challenges. Overall seven approaches and solutions have been identified which...
Advances in Production Management Systems. Smart Manufacturing for Industry 4.0, 2018
The advent of production strategies such as Mass Customization and Changeable Manufacturing requi... more The advent of production strategies such as Mass Customization and Changeable Manufacturing requires that production systems be increasingly flexible towards diverse customer needs. Although humans remain the most flexible entity in modern production systems, the increasing complexity of these systems presents a challenge for the operators with regards to remaining efficient. Research related to Industry 4.0 has promoted the application of digital assistance systems, as a method of augmenting human operators to handle the complexity of these production systems better. However, no digital assistance system that supports human operators in performing manual changeover operations in complex production systems has been identified. This paper, therefore, presents a conceptual digital assistance system, which utilizes information about two consecutive production configurations, and processes this data through an algorithm, to determine which specific changeover operations are required to perform a changeover most efficiently. Potentials of implementing the proposed digital assistance system are briefly introduced, and topics for further research are outlined.
Towards Sustainable Customization: Bridging Smart Products and Manufacturing Systems, 2021
IEEE Transactions on Energy Conversion, 2020
Rendering large-scale 3-D scenes on a thin client is attracting increasing attention with the dev... more Rendering large-scale 3-D scenes on a thin client is attracting increasing attention with the development of the mobile Internet. Efficient scene prefetching to provide timely data with a limited cache is one of the most critical issues for remote 3-D data scheduling in networked virtual environment applications. Existing prefetching schemes predict the future positions of each individual user based on user traces. In this paper, we investigate scene content sequences accessed by various users instead of user viewpoint traces and propose a user access pattern-based 3-D scene prefetching scheme. We make a relationship graph-based clustering to partition history user access sequences into several clusters and choose representative sequences from among these clusters as user access patterns. Then, these user access patterns are prioritized by their popularity and users' personal preference. Based on these access patterns, the proposed prefetching scheme predicts the scene contents that will most likely be visited in the future and delivers them to the client in advance. The experiment results demonstrate that our user access pattern-based prefetching approach achieves a high hit ratio and outperforms the prevailing prefetching schemes in terms of access latency and cache capacity. Index Terms-3-D scenes, networked virtual environment, prefetching, user access patterns.
Superconductor Science and Technology, 2019
The main aim of the EU H2020 project EcoSwing was to demonstrate a technical readiness level of 6... more The main aim of the EU H2020 project EcoSwing was to demonstrate a technical readiness level of 6–7 for high-temperature superconducting (HTS) technology operating in a wind generator. To reach this goal, a full-scale synchronous HTS generator was successfully designed, built and field-tested in a 3.6 MW turbine. The generator has a rotor with 40 superconducting coils of 1.4 m long. The required >20 km of coated conductor was produced within the project’s time schedule. All coils were tested prior to assembly, with >90% of them behaving as expected. The technical readiness level of HTS coils was thus increased to level 7. Simultaneously, the maturing of cryogenic cooling technology over the last decade was illustrated by the several Gifford-McMahon cold-heads that were installed on-board the rotor and connected with the stationary compressors through a rotating coupling. The cryogenic system outperformed design expectations, enabling stable coil temperatures far below the desi...
Procedia CIRP, 2019
In today's business environment, the trend towards more product variety and customization is unbr... more In today's business environment, the trend towards more product variety and customization is unbroken. Due to this development, the need of agile and reconfigurable production systems emerged to cope with various products and product families. To design and optimize production systems as well as to choose the optimal product matches, product analysis methods are needed. Indeed, most of the known methods aim to analyze a product or one product family on the physical level. Different product families, however, may differ largely in terms of the number and nature of components. This fact impedes an efficient comparison and choice of appropriate product family combinations for the production system. A new methodology is proposed to analyze existing products in view of their functional and physical architecture. The aim is to cluster these products in new assembly oriented product families for the optimization of existing assembly lines and the creation of future reconfigurable assembly systems. Based on Datum Flow Chain, the physical structure of the products is analyzed. Functional subassemblies are identified, and a functional analysis is performed. Moreover, a hybrid functional and physical architecture graph (HyFPAG) is the output which depicts the similarity between product families by providing design support to both, production system planners and product designers. An illustrative example of a nail-clipper is used to explain the proposed methodology. An industrial case study on two product families of steering columns of thyssenkrupp Presta France is then carried out to give a first industrial evaluation of the proposed approach.
2010 19th IEEE International Workshops on Enabling Technologies: Infrastructures for Collaborative Enterprises, 2010
ABSTRACT The Scientific Bytecode Virtual Machine is a virtual machine designed specifically for p... more ABSTRACT The Scientific Bytecode Virtual Machine is a virtual machine designed specifically for performance, security, and portability of scientific applications deployed in a Grid environment. The performance overhead normally incurred by virtual machines is mitigated using native optimized scientific libraries, security is obtained by sandboxing techniques. Lastly, by executing platform-independent bytecodes, the machine is highly portable. To evaluate the machine, we demonstrate several use-case scenarios from some of the intended application domains. Further, we show the ease of porting the machine and distributing its jobs to a variety of predominant architectures and compare the results with native execution.
This paper describes the implementation of a thin user-level layer to be installed on Grid resour... more This paper describes the implementation of a thin user-level layer to be installed on Grid resources. The layer fits in the Minimum intrusion Grid design by im-posing as few requirements on the resource as possible and communicates with the server using only trusted and ...
Concurrency and Computation: Practice and Experience, 2007
SUMMARY This paper describes the ideas behind and the implementation of a thin user-level layer t... more SUMMARY This paper describes the ideas behind and the implementation of a thin user-level layer to be installed on Grid resources. The layer fits in the minimum intrusion Grid design by imposing as few requirements on the resource as possible and communicates with the ...
International Journal of Production Research, 2022
A service check for a farm is an interesting new way of advising farmers, which has proven very s... more A service check for a farm is an interesting new way of advising farmers, which has proven very successful. The objective of a service check is to recognise potential improvements in the production using a holistic approach. Often a service check will try to establish the overall goals for the farmer's family, the farmer and the farm. In order to do so, the farm is systematically analysed in order to establish strengths, weaknesses and possible paths of development. These issues are normally neglected in the day-today contact between the farmer and the usual adviser, and even far-reaching decisions are often taken without a decent analysis of the strategic goals. A service check involves a joint visit, where two experienced advisors visit the farm together. The advisors are normally an economic advisor and either a pig or cattle advisor, depending on the farm analysed. Usually, the farm's normal advisors are not participating in the service check. The advisors bring an analy...
Towards Sustainable Customization: Bridging Smart Products and Manufacturing Systems, 2021
Increased product variety, shorter product life cycles and smaller production batches are market ... more Increased product variety, shorter product life cycles and smaller production batches are market conditions faced by manufacturers in both discrete and process industries. Consequently, attention has been given to complexity management techniques, such as product platforms and product modularity. Nevertheless, literature examples of product platforms are almost exclusively provided for discrete products, indicating a lacking body of knowledge on the subject for process industrial products. This study, therefore, applies existing methods for platform-based development in the process industry, which have previously only been demonstrated for discrete products. The methodology used in this paper is Modular Function Deployment developed by Erixon in the 1990s and is applied on a product group in a Danish company in the process industry. The evidence presented suggests that there may be value in investigating the applicability of existing methods for designing product platforms in the process industry, and that these methods may prove a starting ground for further development of methods tailored to this industry.
The initial issue of complexity management in companies is the identification of the drivers of c... more The initial issue of complexity management in companies is the identification of the drivers of complexity. However, current literature lacks methods for assisting practitioners in the initial identification of such drivers. This paper, therefore, presents a novel framework for assisting practitioners with identifying complexity drivers in manufacturing companies. The framework uses a generic value chain and a generic product structure as its two dimensions. Multiple workshops are then conducted with company representatives across different value chain fields focusing on two main parts: First, surveys are used to assign complexity ratings to different generic product structure elements. Secondly, the complexity ratings are elaborated on by workshop participants. The process provides valuable insights into the perceived complexity drivers. The framework is then verified through a case study in the process industry. Based on the case study, multiple complexity drivers were identified ...
The business strategy of Mass Customization, enabled by e.g. Reconfigurable Manufacturing and Cha... more The business strategy of Mass Customization, enabled by e.g. Reconfigurable Manufacturing and Changeable Manufacturing is based on the fundamental premise; to achieve high operational efficiency, while producing high-variety products in small batches and with short product-life cycle of the unique products. To efficiently achieve this premise in manufacturing systems, all levels of changeability must be addressed. This paper investigates a fundamental sub-set of this changeability, which has not been addressed comprehensively by academia; the human changeover ability on workstation level. Based on a literature review, this paper identifies seven human related challenges which must be addressed to be able to manage high-variety and low-volume efficiently on a changeover ability level. This leads to a subsequent literature review that aims at investigating possible approaches and solutions for the identified challenges. Overall seven approaches and solutions have been identified which...
Advances in Production Management Systems. Smart Manufacturing for Industry 4.0, 2018
The advent of production strategies such as Mass Customization and Changeable Manufacturing requi... more The advent of production strategies such as Mass Customization and Changeable Manufacturing requires that production systems be increasingly flexible towards diverse customer needs. Although humans remain the most flexible entity in modern production systems, the increasing complexity of these systems presents a challenge for the operators with regards to remaining efficient. Research related to Industry 4.0 has promoted the application of digital assistance systems, as a method of augmenting human operators to handle the complexity of these production systems better. However, no digital assistance system that supports human operators in performing manual changeover operations in complex production systems has been identified. This paper, therefore, presents a conceptual digital assistance system, which utilizes information about two consecutive production configurations, and processes this data through an algorithm, to determine which specific changeover operations are required to perform a changeover most efficiently. Potentials of implementing the proposed digital assistance system are briefly introduced, and topics for further research are outlined.
Towards Sustainable Customization: Bridging Smart Products and Manufacturing Systems, 2021
IEEE Transactions on Energy Conversion, 2020
Rendering large-scale 3-D scenes on a thin client is attracting increasing attention with the dev... more Rendering large-scale 3-D scenes on a thin client is attracting increasing attention with the development of the mobile Internet. Efficient scene prefetching to provide timely data with a limited cache is one of the most critical issues for remote 3-D data scheduling in networked virtual environment applications. Existing prefetching schemes predict the future positions of each individual user based on user traces. In this paper, we investigate scene content sequences accessed by various users instead of user viewpoint traces and propose a user access pattern-based 3-D scene prefetching scheme. We make a relationship graph-based clustering to partition history user access sequences into several clusters and choose representative sequences from among these clusters as user access patterns. Then, these user access patterns are prioritized by their popularity and users' personal preference. Based on these access patterns, the proposed prefetching scheme predicts the scene contents that will most likely be visited in the future and delivers them to the client in advance. The experiment results demonstrate that our user access pattern-based prefetching approach achieves a high hit ratio and outperforms the prevailing prefetching schemes in terms of access latency and cache capacity. Index Terms-3-D scenes, networked virtual environment, prefetching, user access patterns.
Superconductor Science and Technology, 2019
The main aim of the EU H2020 project EcoSwing was to demonstrate a technical readiness level of 6... more The main aim of the EU H2020 project EcoSwing was to demonstrate a technical readiness level of 6–7 for high-temperature superconducting (HTS) technology operating in a wind generator. To reach this goal, a full-scale synchronous HTS generator was successfully designed, built and field-tested in a 3.6 MW turbine. The generator has a rotor with 40 superconducting coils of 1.4 m long. The required >20 km of coated conductor was produced within the project’s time schedule. All coils were tested prior to assembly, with >90% of them behaving as expected. The technical readiness level of HTS coils was thus increased to level 7. Simultaneously, the maturing of cryogenic cooling technology over the last decade was illustrated by the several Gifford-McMahon cold-heads that were installed on-board the rotor and connected with the stationary compressors through a rotating coupling. The cryogenic system outperformed design expectations, enabling stable coil temperatures far below the desi...
Procedia CIRP, 2019
In today's business environment, the trend towards more product variety and customization is unbr... more In today's business environment, the trend towards more product variety and customization is unbroken. Due to this development, the need of agile and reconfigurable production systems emerged to cope with various products and product families. To design and optimize production systems as well as to choose the optimal product matches, product analysis methods are needed. Indeed, most of the known methods aim to analyze a product or one product family on the physical level. Different product families, however, may differ largely in terms of the number and nature of components. This fact impedes an efficient comparison and choice of appropriate product family combinations for the production system. A new methodology is proposed to analyze existing products in view of their functional and physical architecture. The aim is to cluster these products in new assembly oriented product families for the optimization of existing assembly lines and the creation of future reconfigurable assembly systems. Based on Datum Flow Chain, the physical structure of the products is analyzed. Functional subassemblies are identified, and a functional analysis is performed. Moreover, a hybrid functional and physical architecture graph (HyFPAG) is the output which depicts the similarity between product families by providing design support to both, production system planners and product designers. An illustrative example of a nail-clipper is used to explain the proposed methodology. An industrial case study on two product families of steering columns of thyssenkrupp Presta France is then carried out to give a first industrial evaluation of the proposed approach.
2010 19th IEEE International Workshops on Enabling Technologies: Infrastructures for Collaborative Enterprises, 2010
ABSTRACT The Scientific Bytecode Virtual Machine is a virtual machine designed specifically for p... more ABSTRACT The Scientific Bytecode Virtual Machine is a virtual machine designed specifically for performance, security, and portability of scientific applications deployed in a Grid environment. The performance overhead normally incurred by virtual machines is mitigated using native optimized scientific libraries, security is obtained by sandboxing techniques. Lastly, by executing platform-independent bytecodes, the machine is highly portable. To evaluate the machine, we demonstrate several use-case scenarios from some of the intended application domains. Further, we show the ease of porting the machine and distributing its jobs to a variety of predominant architectures and compare the results with native execution.
This paper describes the implementation of a thin user-level layer to be installed on Grid resour... more This paper describes the implementation of a thin user-level layer to be installed on Grid resources. The layer fits in the Minimum intrusion Grid design by im-posing as few requirements on the resource as possible and communicates with the server using only trusted and ...
Concurrency and Computation: Practice and Experience, 2007
SUMMARY This paper describes the ideas behind and the implementation of a thin user-level layer t... more SUMMARY This paper describes the ideas behind and the implementation of a thin user-level layer to be installed on Grid resources. The layer fits in the minimum intrusion Grid design by imposing as few requirements on the resource as possible and communicates with the ...