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Träfflista för sökning "hsv:(TEKNIK OCH TEKNOLOGIER) hsv:(Maskinteknik) hsv:(Produktionsteknik arbetsvetenskap och ergonomi) "

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  • Ekberg, Anders, 1967-, et al. (författare)
  • INNOTRACK: Concluding technical report
  • 2010
  • Samlingsverk (redaktörskap) (övrigt vetenskapligt)abstract
    • The track structure, rails, switches and crossings account for more than 50% of maintenance and renewal costs for the rail industry. To improve the competitiveness of rail transportation, the cost-efficiency of these areas needs to be addressed.This the background to INNOTRACK, an integrated research project funded by the European Commission’s 6th research framework pro- gramme. Running from September 2006 to December 2009, INN- OTRACK has developed a multitude of innovative solutions in the areas of track substructure, rails & welds, and switches & crossings. The solutions have been assessed from technical, logistics and life cycle cost point of views.This Concluding Technical Report of INNOTRACK includes an overview of the project. It further details implementable results, and clusters them into ”highlight” areas. In addition, the book acts as a ”key” to the vast amount of information from INNOTRACK: All sections refer to project reports where more information can be found.
  • Stylidis, Kostas, 1978-, et al. (författare)
  • Perceived quality framework in product generation engineering: an automotive industry example
  • 2019
  • Ingår i: Digital tvilling för geometrisäkrad produktion.
  • Tidskriftsartikel (refereegranskat)abstract
    • Perceived quality refers to customers’ cognitive and emotional responses to a particular design, often also associated with craftsmanship and customer satisfaction. Previous research defined a taxonomy of perceived quality and provided understanding about how engineering design decisions impact customer satisfaction. Furthermore, development of new products is frequently based on carrying over attributes of existing products, either from the same producer or from competitors. Previous research offered a new product development methodology combining variations of subsystems to carry over from existing products. This brief presents how these two lines of research combined to design the central console of the Porsche Panamera automobile and discusses the opportunities and challenges posed in the practical implementation of this research.
  • Stylidis, Kostas, 1978-, et al. (författare)
  • Perceived quality of products: a framework and attributes ranking method
  • 2020
  • Ingår i: Digital tvilling för geometrisäkrad produktion.
  • Tidskriftsartikel (refereegranskat)abstract
    • Perceived quality is one of the most critical aspects of product development that defines the successful design. This paper presents a new approach to perceived quality assessment by examining its elements, decomposed into a structure with the bottom-up sensory approach from the level of basic (‘ground’) attributes, covering almost every aspect of quality perception from the engineering viewpoint. The paper proposes a novel method for perceived quality attributes relative importance ranking, resulting in the balanced perceived quality of the final product within the given conditions. The proposed method helps to reach the equilibrium of the product’s quality equation from the perspective of design effort, time, and costs estimations. The authors introduce the Perceived Quality Framework (PQF), which is the taxonomy system for perceived quality attributes and the core of the attributes importance ranking (PQAIR) method. The research outcomes are based on findings of the qualitative exploratory study, including European and North American premium and luxury automotive manufacturers. An empirical structural validity test was performed to assess the usability and rigour of the proposed method. The results indicate that perceived quality evaluation can be significantly improved during all stages of product development.
  • Stylidis, Konstantinos, 1978-, et al. (författare)
  • Towards Overcoming the Boundaries between Manufacturing and Perceived Quality: An Example of Automotive Industry
  • 2017
  • Ingår i: Procedia CIRP. - 22128271. ; 63, s. 733-738
  • Konferensbidrag (refereegranskat)abstract
    • Automotive manufacturing enterprises face many challenges today. Remaining as one of the biggest among them is delivering value to the customers through product quality. Moreover, good manufacturing or technical quality does not always result in high perceived quality from a customer perspective. At the same time, perceived quality is a property that has to be incorporated into the product during the whole product lifecycle, from design to production. Throughout the production stage, every manufacturing operation contributes to the building of final product's perceived quality. Thus, there is a need to control manufacturing operations related to this matter. This paper addresses the connection of the perceived quality framework, which defines dimensions of the perceived quality, to a manufacturing model that represents the manufacturing variation and propagation during different assembly operations. The aim of the study is to overcome boundaries between manufacturing and perceived quality. An industrial example, within the automotive premium sector, has been used to draw this connection illustrating the case of welded assemblies.
  • Högman, Ulf, 1961-, et al. (författare)
  • Requirements on New Technology and the Technology Implementation Process
  • 2010
  • Ingår i: 8th International NordDesign Conference, NordDesign 2010; Goteborg; Sweden; 25 August 2010 through 27 August 2010. ; 2, s. 289-300
  • Konferensbidrag (refereegranskat)abstract
    • In literature, many authors have pointed to the importance of technology and technology development for company competitiveness. In this study we aim to study the technology in more detail and attempt to develop an understanding on the requirements and needs on “technology” from the perspective of product development. The research question which we aim to answer in this study is:“What are the requirements on maturity of technology when this technology is about to enter into the product development process?“A qualitative research strategy, based on three study cases involving 17 interviewees, has been chosen. All three cases come from one single company, Volvo Aero Corporation (VAC) in Sweden, in the context of the aero engine industry. The study contributes with a broad mapping of requirements and how they relate to different categories of technologies, showing big differences both regarding content and timing. It is concluded that attention should be payed both to how the organization builds new capabilities and to the capabilities of the technology itself. A surprisingly complicated picture on the requirements relating to the implementation of new technologies has emerged in the study. This contributes to the understanding regarding the difficulties of developing new technology and integrating it into an application.
  • Heshmati, Mohsen, 1987-, et al. (författare)
  • Dependency of cohesive laws of a structural adhesive in Mode-I and Mode-II loading on moisture, freeze-thaw cycling, and their synergy
  • 2017
  • Ingår i: Materials and Design. - 0264-1275. ; 122, s. 433-447
  • Tidskriftsartikel (refereegranskat)abstract
    • In recent years, adhesive bonding has found its way to construction applications such as bridges. Given the harsh conditions that such structures are usually exposed to, it is necessary to account for environmental factors, particularly moisture and temperature, in the design phase. Cohesive zone modelling has attracted much attention in the last decade as a promising method to design adhesive joints. Despite this interest, the effects of moisture and thermal cycles on cohesive laws have not been investigated to the knowledge of the authors. In this paper, we present a method to directly measure the environmental-dependent cohesive laws of a structural adhesive loaded in pure Mode-I and Mode-II. Special consideration is given to overcome issues such as the time-consuming nature of moisture ingression and specimen dimensions, which could be problematic due to the size-limitations of conditioning equipment. The accuracy of this method was verified through simulation of the experiments using the finite element analysis. The effects of exposure to 95% relative humidity, immersion in saltwater and distilled water, and freeze-thaw cycles in the presence or absence of moisture were investigated. The results indicate the damaging effects of combined saltwater and freeze-thaw cycles which were clearly reflected on the shape of the cohesive laws.
  • Bergman, Martin, 1985- (författare)
  • Affective Surface Engineering for Product Design
  • 2016
  • Licentiatavhandling (övrigt vetenskapligt)abstract
    • Design research, sensation and perception, hard metrology, emotional functions, semantics, surface roughness, product interaction, core values, total appearance… the list of scientific phrases never ends. Yet, what do they mean and how shall we use it when we are communicating with the industry and our end users? Is it possible to link the product experience to process parameters, put a number onto it? When you can measure spoken needs or even better, implied needs, of a product, and relate that data to the production, it is possible do create advanced products with high interaction stimuli. By joining engineering sciences (hard metrology) with design science (soft metrology) correlations between customer’s product experience (emotional functions) and surface properties (technical functions) can be established.The research briefly handles an optimization process where the framework from Kansei Engineering (KE) is used to evaluate the semantics issues primarily regarding materials and functional surfaces of products. The basic idea is that; the stakeholder’s experience shall be observed already at the phase of ideation in the product development process, which then facilitates the project (in regard to the total appearance) later on when a concept reaches the production stage. The results presented in this thesis are carried out through a number of case studies together with the industry. The main result and aim of the research is a developed robust approach that links emotional functions with technical functions, which in the next step facilitates the improvement of the total appearance of a product.  Nevertheless, it should be recognized that research is not yet complete. It is an iterative process, which confirms that the loop of the method needs to be complete. The developed method is a toolbox with the fundamental tools and workshops to facilitate the correlation process mentioned above, however the packaging of the final step in the method is not yet complete. The future research outlook will focus on the “independent industry implementation” where the method is used by the industry by guidelines only, thus without researchers support.
  • Berlin, Cecilia, 1981-, et al. (författare)
  • Using the ACD3-ladder to manage multi-phase requirements on end-user products
  • 2017
  • Ingår i: 21st International Conference on Engineering Design, ICED 2017, Vancouver, Canada, 21-25 August 2017. - 2220-4342. - 978-1-904670-87-2 ; 4:DS87-4, s. 425-434
  • Konferensbidrag (refereegranskat)abstract
    • During the development of any end-user product, a multitude of design decisions need to be made. But if design activities and decisions happen at the wrong time, or not at all, unintentional and sometimes negative design outcomes can be the result. Determining all requirements early in the product development is traditionally recommended, but may force design decisions to be made prematurely onthe basis of incomplete preconditions. Requirements at different degrees of resolution are useful and purposeful at different stages of the development process. To address these requirements management challenges, this paper proposes an approach for incrementally developing requirements in parallel with design, based upon a previously developed framework called ACD³, which draws on a combination of theoretically compatible ideas and concepts from Design Engineering, Human Factors/Ergonomics,Usability and Systems Theory. This approach helps designers identify and handle the possible interdependencies of design variables. The paper also theoretically motivates and demonstrates with an example how the different resolution levels of requirements relate within the framework.
  • Gong, Xuejian, et al. (författare)
  • Simulation-Driven Manufacturing Planning for Product-Production Variety Coordination
  • 2018
  • Ingår i: 2017 IEEE Industrial Engineering and Engineering Management. - 2157-362X. ; s. 2039-2043
  • Konferensbidrag (refereegranskat)abstract
    • Ambitious manufacturers are challenged to satisfy a broad range of customers while ensuring that the emerging product variety can be produced. Current practice suggests that products and production systems are modeled separately until the late stages of development when the designs are fixed and modifications are costly. In this paper, both product and production varieties are modeled, assessed, and evaluated using discrete-event simulation during preliminary stages. An illustrative example from the aerospace industry is used to demonstrate the approach. The simulation software Simio is used to model a sequence of operations and a set of input data related to a variety of aerospace sub-systems and a variety of welding resources. Through the simulations, the average utilization rate, the average throughput time, and the average work in process are generated. These outputs are used to evaluate the sets of product-production alternatives during the early stages of platform development when the cost to adjust the design of the products, production resources and operations are trifling.
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