| 61. |
- Hoffenson, Steven, 1985, et al.
(författare)
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Tolerance Optimization of a Mobile Phone Considering Consumer Demand for Quality and Sustainability in China, Sweden, and the United States
- 2013
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Ingår i: International Conference on Engineering Design. - : Design Research Society. ; 7 DS75-07, s. 467-476, s. 467-476
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Tidskriftsartikel (refereegranskat)abstract
- Dimensional tolerances are chosen during the product development process to balance quality requirements against manufacturing costs. Designers typically judge how much variance should be allowed while still maintaining the perception of a high quality product or brand, but this is rarely based on an understanding of how consumers perceive that variance. Additionally, ecological sustainability priorities are often chosen without knowing how they will be received by consumers. This paper presents a survey-based technique for understanding how tolerance and pricing decisions influence a product developing firm’s profits, accounting for consumer perceptions of quality and environmental friendliness. A case study of a mobile phone design is explored, including variance propagation modeling, the design and administration of an online choice-based conjoint (CBC) survey, construction of consumer demand models, and profit maximization for the markets in three different countries. The results show a slight preference for high quality products compared with stronger preferences for other product attributes like low price, and the differences among the three markets are highlighted.
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| 62. |
- Jagtap, Santosh, et al.
(författare)
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How design process for the Base of the Pyramid differs from that for the Top of the Pyramid
- 2014
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Ingår i: Design Studies. - : Elsevier BV. - 0142-694X .- 1872-6909. ; 35:5, s. 527-558
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Tidskriftsartikel (refereegranskat)abstract
- The base (BOP) and the top (TOP) of the world income pyramid represent the poor people and the people from developed countries, respectively. The design of products for the BOP is an important ingredient of the poverty reduction approach that combines business development with poverty alleviation. However, the current understanding of the design for the BOP is limited. This study, using a protocol analysis, compared design processes for the BOP and TOP markets. The results indicate the difference between the design processes for these markets in terms of the design strategy employed by the designers (i.e. problem driven, solution driven strategy), their requirements handling behaviour, and their information behaviour.
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| 63. |
- Kans, Mirka, 1971-, et al.
(författare)
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Data Driven Maintenance : A Promising Way of Action for Future Industrial Services Management
- 2022
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Ingår i: International Congress and Workshop on Industrial AI 2021. IAI 2021. - Cham : Springer. - 9783030936389 - 9783030936396 ; , s. 212-223, s. 212-223
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Konferensbidrag (refereegranskat)abstract
- Maintenance and services of products as well as processes are pivotal for achieving high availability and avoiding catastrophic and costly failures. At the same time, maintenance is routinely performed more frequently than necessary, replacing possibly functional components, which has negative economic impact on the maintenance. New processes and products need to fulfil increased environmental demands, while customers put increasing demands on customization and coordination. Hence, improved maintenance processes possess very high potentials, economically as well as environmentally. The shifting demands on product development and production processes have led to the emergency of new digital solutions as well as new business models, such as integrated product-service offerings. Still, the general maintenance problem of how to perform the right service at the right time, taking available information and given limitations is valid.The project Future Industrial Services Management (FUSE) project was a step in a long-term effort for catalysing the evolution of maintenance and production in the current digital era. In this paper, several aspects of the general maintenance problem are discussed from a data driven perspective, spanning from technology solutions and organizational requirements to new business opportunities and how to create optimal maintenance plans. One of the main results of the project, in the form of a simulation tool for strategy selection, is also described.
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| 64. |
- Kurrewar, Harshad, et al.
(författare)
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A Machine Learning Based Health Indicator Construction in Implementing Predictive Maintenance: A Real World Industrial Application from Manufacturing
- 2021
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Ingår i: IFIP Advances in Information and Communication Technology. - Cham : Springer International Publishing. - 1868-4238 .- 1868-422X. ; 632 IFIP, s. 599-608
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Konferensbidrag (refereegranskat)abstract
- Predictive maintenance (PdM) using Machine learning (ML) is a top-rated business case with respect to the availability of data and potential business value for future sustainability and competitiveness in the manufacturing industry. However, applying ML within actual industrial practice of PdM is a complex and challenging task due to high dimensionality and lack of labeled data. To cope with this challenge, this paper presents a systematic framework based on an unsupervised ML approach by aiming to construct health indicators, which has a crucial impact on making the data meaningful and usable for monitoring machine performance (health) in PdM applications. The results are presented by using real-world industrial data coming from a manufacturing company. In conclusion, the designed health indicators can be used to monitor machine performance over time and further be used in a supervised setting for the purpose of prognostic like remaining useful life estimation in implementing PdM in the industry.
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| 65. |
- Madrid, Julia, 1988, et al.
(författare)
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Enabling reuse of inspection data to support robust design: a case in the aerospace industry
- 2016
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Ingår i: Procedia CIRP. - : Elsevier BV. - 2212-8271. ; 43, s. 41-46
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Konferensbidrag (refereegranskat)abstract
- The use and reuse of information and knowledge from manufacturing are crucial to secure the quality of the product throughout the product realization process. Robust design, variation simulation, virtual verification and root causes analysis are activities that require inspection data to ensure a robust process. In many industries, the level of inspection data reused is rather low. In this study, general barriers for reusing data concerning manufacturing processes have been identified in scientific literature and compared with specific barriers identified in a case study performed at an aerospace engine manufacturer. As an output of this comparison, barriers to the reuse of inspection data have been classified in three types: informational, technical, and organizational. In addition, the informational barriers are decomposed in four questions: Why, What, When and, How to measure. A support to answer those questions and overcome the informational barriers is proposed.
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| 66. |
- Michaelis, Marcel, 1982, et al.
(författare)
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Integrating Product and Manufacturing System Platforms - Exploring a Configurable System Approach
- 2010
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Ingår i: Proceedings of the 11th International Design Conference DESIGN 2010. - 9789537738075 ; , s. 1605 - 1614
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Konferensbidrag (refereegranskat)abstract
- While platform strategies are not the silver bullet to the development of products and manufacturing systems, they might at least yield some benefits. This paper explores a specific platform approach looking at products and manufacturing units as configurable systems. It reports an explorative empirical study identifying issues in integrated development. These issues are matched with the capability of the chosen approach to help solving them. Expressing information on appropriate levels of abstraction and illustrating interconnections of the systems are concluded to be two of the benefits.
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| 67. |
- Michaelis, Marcel, 1982, et al.
(författare)
-
Plattform-Based Development
- 2011
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Ingår i: Entering the Tiger's Cave - Perspectives on Japanese and Swedisch Product Development. Dag Bergsjö (Ed.). ; , s. 31-35
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- One of the main drivers for platform-based development and production is the possibility to combine customization with economies of scale. The reuse of common resources in multiple, customized design variants is one way of achieving this. However, the economic benefits may be easily lost. A relatively small design differentiation, for example, may lead to a relatively large number of parts having to be modified. More fruitful approaches that can support carry-over without major drawbacks include, for example, adopting a carefully planned development process or to reusing more abstract design knowledge.
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| 68. |
- Raja, Visakha, 1985
(författare)
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On the Design of Functionally Integrated Aero-engine Structures: Modeling and Evaluation Methods for Architecture and Complexity
- 2019
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The drive for airplanes with radically reduced fuel consumption and emissions motivates engine manufacturers to explore innovative engine designs. The novelty of such engines results in changed operating conditions, such as newly introduced constraints, increased loads or rearranged interfaces. To be competitive, component developers and manufacturers must understand and predict the consequences of such changes on their sub-systems. Presently, such assessments are based on detailed geometrical models (CAD or finite element) and consume significant amounts of time. The preparation of such models is resource intensive unless parametrization is employed. Even with parametrization, alternative geometrical layouts for designs are difficult to achieve. In contrast to geometrical model-based estimations, a component architecture representation and evaluation scheme can quickly identify the functional implications for a system-level change and likely consequences on the component. The schemes can, in turn, point to the type and location of needed evaluations with detailed geometry. This will benefit the development of new engine designs and facilitate improvements upon existing designs. The availability of architecture representation schemes for functionally integrated (all functions being satisfied by one monolithic structure) aero-engine structural components is limited. The research in this thesis focuses on supporting the design of aero-engine structural components by representing their architecture as well as by developing means for the quantitative evaluation and comparison of different component designs. The research has been conducted in collaboration with GKN Aerospace Sweden AB, and the components are aero-engine structures developed and manufactured at GKN. Architectural information is generated and described based on concepts from set theory, graph theory and enhanced function–means trees. In addition, the complexities of the components are evaluated using a new complexity metric. Specifically, the developed modeling and evaluation methods facilitate the following activities: · identification and representation of function–means information for the component · representation and evaluation of component architecture · product complexity evaluation · early selection of load path architecture · impact assessment for the component’s functioning in the system By means of the methods developed in this thesis, the design rationale for a component is made explicit, and the storing, communicating and retrieving of information about the component in the future is enabled. Through their application to real-life engine structures, the usability of the methods in identifying early load carrying configurations and selecting a manufacturing segmenting option is demonstrated. Together, the methods provide development engineers the ability to compare alternative architectures. Further research could focus on exploring the system (engine) effects of changes in component architecture and improvements to the complexity metric by incorporating manufacturing information.
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| 69. |
- Ramanujam, Harshavardhan, et al.
(författare)
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Barriers and opportunities of implementing design thinking in product development process of a business to business company
- 2021
-
Ingår i: Proceedings of the Design Society: 23rd International Conference on Engineering Design, ICED 2021. - : Cambridge University Press (CUP). ; , s. 551-560
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Konferensbidrag (refereegranskat)abstract
- Customer centricity is described as placing value creation for customers at the core of business decisions and organizational practices and is progressively regarded as a foundation of sustainable competitive advantage by companies. Hence in recent years, there is a shift from companies being product-centric to them adapting customer-centric practices as a practice to create balanced and sustainable businesses. Although there are several methods and processes that can help companies become customer-centric; Design Thinking (DT) is championed by many practitioners and academics alike as being effective in introducing customer-centricity in organizations. Despite being a highly researched topic in the last decade, the bulk of the research is focused on success stories or one-off cases of using design thinking in Business to Customer (B2C) environments. This paper is based on a qualitative study performed at a high-tech Swedish electronics company and focuses on highlighting the barriers and opportunities of adapting DT in Business to Business (B2B) companies with established product development processes. The barriers we identified can help companies to address the impediments and will make the DT implementation easier for companies
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| 70. |
- Rompokos, Pavlos, et al.
(författare)
-
Synergistic technology combinations for future commercial aircraft using liquid hydrogen
- 2020
-
Ingår i: Proceedings of the ASME Turbo Expo. ; 3
-
Konferensbidrag (refereegranskat)abstract
- Liquid hydrogen (LH2) has long been seen as a technically feasible fuel for a fully sustainable greener aviation future. The low density of the cryogenic fuel would dictate the redesign of commercial aircraft to accommodate the large tanks, which are unlikely to be integrated within the whole internal volume of the wing. In the ENABLEH2 project, the morphological aspects of a LH2 aircraft design are discussed and a methodology for rapid concept comparative assessment is proposed. An exercise is then carried on to down-select short-to-medium range (SMR) and long-range (LR) concepts, able to carry 200 passengers for 3000 nmi and 414 passengers for 7500 nmi respectively. The down-selection process was split into two phases with the first considering 31 potential airframe architectures and 21 propulsion-system arrangements. The second phase made the final down-selections from a short-list of nine integrated design concepts that were ranked according to 34 criteria, relating to operating cost, revenue, noise and safety. Upon completion of the process, a tube and wing design with the tanks integrated into extended wing roots, and a blended-wing-body design were selected as the best candidates for the SMR and LR applications respectively. Both concepts feature distributed propulsion to maximise synergies from integrating the airframe and propulsion systems.
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