| 1. |
- Fagerström, Björn, et al.
(författare)
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Efficient collaboration between main and sub-suppliers
- 2002
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Ingår i: Computers in industry. - 0166-3615 .- 1872-6194. ; 49:1, s. 25-35
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Tidskriftsartikel (refereegranskat)abstract
- Many sub-suppliers are interested in closer integration with main suppliers for product development. However, main suppliers have much work that needs to be coordinated, and close integration with suppliers is used only when it is required, and when additional value is created through integration. The main objective of this paper, is therefore, to discuss different supplier roles and increase the understanding of how suppliers can be integrated with the main supplier. The result is based on a case study with one main supplier and nine of its sub-suppliers, where the main supplier develops, assembles, and delivers a complete, complex product to the customer, and the sub-suppliers develop and manufacture sub-systems for the main supplier. The results give new insights into what the sub-suppliers could do in order to improve integration with the main supplier.
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| 2. |
- Säfsten, Kristina, et al.
(författare)
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Analysis of the congruence between manufacturing strategy and production system in SMME
- 2002
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Ingår i: Computers in industry (Print). - 0166-3615 .- 1872-6194. ; 49:1, s. 91-106
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- A production system must reflect a company's manufacturing strategy and the chosen competitive priorities. Tools to assess the congruence between the manufacturing strategy and the production system can hence support the companies' competitive position. In this paper, the usability of an analysis model suggested by Miltenburg [How to Formulate and Implement a Winning Plan, Productivity Press, Portland, OR, 1995], aiming at mapping manufacturing strategy and production system, is investigated. The usefulness of the analysis model is investigated in terms of how easy it is to use and in terms of the obtained results. The investigation is performed by means of empirical studies in two medium sized manufacturing companies. The result is that the model seems to be useful in the sense that, if knowledge about the underlying principles in the analysis model is at hand, it is possible to investigate the congruence between a manufacturing strategy and a production system. It is, however, believed that the analysis model needs some further development to be considered an easy to use tool, e.g. for a SMME production manager. © 2002 Elsevier Science B.V. All rights reserved.
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| 3. |
- Ahmadi Achachlouei, Mohammad, et al.
(författare)
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Developing life-cycle phases for the DoDAF using ISO15704 Annex A (GERAM)
- 2011
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Ingår i: Computers in industry (Print). - : Elsevier BV. - 0166-3615 .- 1872-6194. ; 62:3, s. 253-259
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents a development of the US Department of Defense Architecture Framework (DoDAF) based on life-cycle concept of the Generalized Enterprise Reference Architecture and Methodology (GERAM) framework/ISO 15704:2000 requirements. Previous research has identified areas of concern within DoDAF by analyzing and evaluating DoDAF against GERAM and potentially assisting in its future development. This paper aims to extend existing architecture description process and artifacts within DoDAF that match the scope of the GERAM life-cycle phases. For this development we use life-cycle aspect of three well-known reference architectures (including PERA, CIMOSA, and GRAI-GIM) that were the basis in formation of GERAM.
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| 4. |
- Alzghoul, Ahmad, et al.
(författare)
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Comparing a knowledge-based and a data-driven method in querying data streams for system fault detection : A hydraulic drive system application
- 2014
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Ingår i: Computers in industry (Print). - : Elsevier. - 0166-3615 .- 1872-6194. ; 65:8, s. 1126-1135
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Tidskriftsartikel (refereegranskat)abstract
- The field of fault detection and diagnosis has been the subject of considerable interest in industry. Fault detection may increase the availability of products, thereby improving their quality. Fault detection and diagnosis methods can be classified in three categories: data-driven, analytically based, and knowledge-based methods.In this work, we investigated the ability and the performance of applying two fault detection methods to query data streams produced from hydraulic drive systems. A knowledge-based method was compared to a data-driven method. A fault detection system based on a data stream management system (DSMS) was developed in order to test and compare the two methods using data from real hydraulic drive systems.The knowledge-based method was based on causal models (fault trees), and principal component analysis (PCA) was used to build the data-driven model. The performance of the methods in terms of accuracy and speed, was examined using normal and physically simulated fault data. The results show that both methods generate queries fast enough to query the data streams online, with a similar level of fault detection accuracy. The industrial applications of both methods include monitoring of individual industrial mechanical systems as well as fleets of such systems. One can conclude that both methods may be used to increase industrial system availability.
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| 5. |
- Alzghoul, Ahmad, et al.
(författare)
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Comparing a knowledge-based and a data-driven method in querying data streams for system fault detection: A hydraulic drive system application
- 2014
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Ingår i: Computers in industry (Print). - : Elsevier BV. - 0166-3615 .- 1872-6194. ; 65:8, s. 1126-1135
-
Tidskriftsartikel (refereegranskat)abstract
- The field of fault detection and diagnosis has been the subject of considerable interest in industry. Fault detection may increase the availability of products, thereby improving their quality. Fault detection and diagnosis methods can be classified in three categories: data-driven, analytically based, and knowledge-based methods. In this work, we investigated the ability and the performance of applying two fault detection methods to query data streams produced from hydraulic drive systems. A knowledge-based method was compared to a data-driven method. A fault detection system based on a data stream management system (DSMS) was developed in order to test and compare the two methods using data from real hydraulic drive systems. The knowledge-based method was based on causal models (fault trees), and principal component analysis (PCA) was used to build the data-driven model. The performance of the methods in terms of accuracy and speed, was examined using normal and physically simulated fault data. The results show that both methods generate queries fast enough to query the data streams online, with a similar level of fault detection accuracy. The industrial applications of both methods include monitoring of individual industrial mechanical systems as well as fleets of such systems. One can conclude that both methods may be used to increase industrial system availability
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| 6. |
- Arjomandi Rad, Mohammad, et al.
(författare)
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Correlation-based feature extraction from computer-aided design, case study on curtain airbags design
- 2022
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Ingår i: Computers in industry (Print). - : Elsevier. - 0166-3615 .- 1872-6194. ; 138
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Tidskriftsartikel (refereegranskat)abstract
- Many high-level technical products are associated with changing requirements, drastic design changes, lack of design information, and uncertainties in input variables which makes their design process iterative and simulation-driven. Regression models have been proven to be useful tools during design, altering the resource-intensive finite element simulation models. However, building regression models from computer-aided design (CAD) parameters is associated with challenges such as dealing with too many parameters and their low or coupled impact on studied outputs which ultimately requires a large training dataset. As a solution, extraction of hidden features from CAD is presented on the application of volume simulation of curtain airbags concerning geometric changes in design loops. After creating a prototype that covers all aspects of a real curtain airbag, its CAD parameters have been analyzed to find out the correlation between design parameters and volume as output. Next, using the design of the experiment latin hypercube sampling method, 100 design samples are generated and the corresponding volume for each design sample was assessed. It was shown that selected CAD parameters are not highly correlated with the volume which consequently lowers the accuracy of prediction models. Various geometric entities, such as the medial axis, are used to extract several hidden features (referred to as sleeping parameters). The correlation of the new features and their performance and precision through two regression analyses are studied. The result shows that choosing sleeping parameters as input reduces dimensionality and the need to use advanced regression algorithms, allowing designers to have more accurate predictions (in this case approximately 95%) with a reasonable number of samples. Furthermore, it was concluded that using sleeping parameters in regression-based tools creates real-time prediction ability in the early development stage of the design process which could contribute to lower development lead time by eliminating design iterations.
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| 7. |
- Arushanyan, Yevgeniya, 1984-, et al.
(författare)
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Lessons learned : Review of LCAs for ICT products and services
- 2014
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Ingår i: Computers in industry (Print). - : Elsevier. - 0166-3615 .- 1872-6194. ; 65:2, s. 211-234
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Tidskriftsartikel (refereegranskat)abstract
- Application of information and communication technology (ICT) is often expected to result in decreased environmental impacts. Several studies have, however, also addressed the possibilities of negative impacts. It is therefore important to assess environmental impacts of ICT products and services. Life Cycle Assessment (LCA) is a tool for assessing the potential impacts of a product or service over the whole life-cycle, i.e. from raw material acquisition to waste management via production and use phases. The aim of this paper is to review LCA studies of ICT products and services, including a few Social Life Cycle Assessment (S-LCA) studies. Many of the studies have considered consumer products, such as computers and TVs. Other consumer products, such as game consoles and TV peripherals, as well as business products, e.g. related to networks, are however more rarely assessed. Manufacturing and use phase have the highest impact in the life cycle. Use phase seems to be the predominant in energy consumption and global warming for some ICT products but for others, especially energy efficient, low weight products, manufacturing may dominate. Rapid technological development is stressed by several authors as a source of variability of results, impacting the production processes and suppliers as well as the content and energy performance of the actual devices. In the future, conducting LCA on ICT, the research community needs to consider the limitations found in the studies conducted so far. It encompasses, among others, the need to address a broad spectrum of environmental impacts, including human and ecotoxicological impacts; modeling actual e-waste management, covering informal management when relevant; and considering user behavior in a realistic way, accounting for rebound and other indirect effects.
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| 8. |
- Bertoni, Marco, Professor, 1980-, et al.
(författare)
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Designing solutions with the product-service systems digital twin : What is now and what is next?
- 2022
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Ingår i: Computers in industry (Print). - : Elsevier. - 0166-3615 .- 1872-6194. ; 138
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Tidskriftsartikel (refereegranskat)abstract
- Digital Twins (DT) are of particular interest in the domain of Product-Service Systems (PSS), to predict hardware availability, to inform about the needed features of new solutions, and to forecast the expected performances of new configurations in operation. The aim of this paper is to shed light on the extent to which ‘twins’ are applied today across the PSS life cycle, and to spotlight the ability of DT-related case studies to capture a full value perspective vs. simply attempting to represent hardware and services in the digital realm. By means of a systematic literature review combined with a mapping study, the paper reveals how only a minimal part of the existing literature is able to demonstrate how real-time physical-to-virtual and virtual-to-physical connections can be used to improve the design of servitized solutions. The analysis shows how contributions in the topic are mostly proposing frameworks and methods, as opposed to models and tools, as well as how ‘evaluation’, ‘validation’ tasks are largely neglected. As a result, the paper proposes a specialized definition of the PSS DT, together with a set of research questions that need to be answered to empower the engineering teams with relevant DT for PSS design.
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| 9. |
- Bertoni, Marco, et al.
(författare)
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PLM paradigm : how to lead BPR within product development field
- 2009
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Ingår i: Computers in industry (Print). - : Elsevier BV. - 0166-3615 .- 1872-6194. ; 60:7, s. 476-484
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Tidskriftsartikel (refereegranskat)abstract
- The design and implementation of a PLM solution in a cross-company environment is a complex and labour intensive operation, which is often coupled with a Business Process Re-engineering (BPR) project to better deploy technologies as well as methodologies and to target the system implementation on the real company needs. Enterprise Modelling (EM) languages are typically used to collect and share process knowledge among the BPR participants. Plenty of techniques are actually available at this scope and it is not always easy to understand how to select and use them in the different steps of re-engineering. The main purpose of this paper is to perform a qualitative analysis of three well known EM languages (IDEF, UML and ARIS) and to propose a new methodology, based on their integrated use, supporting BPR efforts in the Product Development domain.
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| 10. |
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