3,353 research outputs found
Towards a framework for value-driven design in civil aerospace systems: a case study
No full textValue-Driven Design combines economic theory, systems engineering and multi-disciplinary analysis and optimisation to help improve the design of complex systems. An approach to Value-Driven Design is the surplus value theory, which utilises financial measures to act as a scoring function for how much a design is worth to the operation of an entire system. This is beneficial for design decisionmaking in system trades and technology evaluation. In this paper, a Value-Driven Design methodology is introduced using the surplus value metric and applied to an aerospace system case study
Bill Harney on a spear fishing expedition with Eric Jolliffe and Robert Fitzpatrick, off Long Reef, New South Wales, ca. 1940s [picture] /
No full textTitle based on information from acquisition documentation and from caption on verso.; Part of collection: Collection of photographs of author and bushman, Bill Harney, ca. 1940-1962.; Photograph taken by Jim Fitzpatrick, a photographer with the Department of Information in the 1940s in Sydney. Robert Fitzpatrick is the son of the photographer.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.pic-vn3706122; Purchased from Michael Treloar Antiquarian Booksellers, List 90, Lot 64, 2006
Utilising dynamic factory simulation to improve unit cost estimation and aid design decisions
No full textUtilising dynamic simulation methods to estimate manufacturing resources, can improve unit cost estimation and aid design decisions. This paper introduces a framework specification that combines Computer Aided Design (CAD), Computer Aided Process Planning (CAPP) and Discrete Event Simulation (DES) technologies. The framework is used to aid a design team in understanding the consequences of design decisions in terms of cost and manufacturing resources, by returning unit cost and manufacturing based results, directly to the design team, within the design environment. Dynamic Resource Estimation System (DRES) is a system being developed to implement the framework and is presented in this pape
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[Portrait of Jim Marrs]
No full textPortrait of Jim Marrs smiling at the camera while sitting on a wooden bench. He wears a plaid button-up shirt, black hat, and sunglasses. Marrs was an American journalist and author of publications such as his book, "Crossfire." Marrs is known for his conspiracy theories, specifically in relation to the assassination of John F. Kennedy
The inertia problem: implementation of a holistic design support system
No full textThis paper describes and reflects on the implementation of a Knowledge Based Holistic Design Support System – termed “HolD” – into a business environment.The paper introduces the rationale and development behind the system, a consciously different approach to traditional knowledge based systems in engineering in order to meet the requirements of a small business producing bespoke, low volume products.Typical knowledge based engineering systems rely on explicitly codified knowledge which often support product optimisation rather than creative design activities. Such a system would provide little benefit to a business producing bespoke products. Instead, the system presented here, supports the creativity of designers through codified tacit knowledge input by designers as meta-data for past designs.The problem of individual inertia in adopting the system and sharing knowledge was approached early in the construction of the system. The steps taken to lower user barriers and encourage day-to-day use are detailed, including the design of a multi-stage input process designed to interact at key stages of users' existing processes.The immediate results after a 6 month trial period are presented and the results show slower than anticipated usage. In particular designers were found to be reluctant to input detailed information beyond common identifying data and did not attempt to seek information from the system. The reasons for this slower usage are discussed and possible solutions presented. The paper therefore provides industrial based evidence of the inertia encountered when implementing a knowledge system and argues that technology alone is insufficient to overcome this inertia
Improving design rationale capture during embodiment design
No full textDesign rationale can help solve difficult problems, aid design reviews and make design reuse easier. It is observed that the capture and reuse of rationale tends to decrease during the detail design phase. The inability to connect rationale to geometry is identified as a probable cause. A solution is proposed to increase the ease of design rationale capture during detail design by creating links between design rationale nodes and the corresponding parameters in the CAD design. Further implementation and testing of these concepts is discussed<br/
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