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See detailConnections between the design tool, design attributes, and user preferences in early stage design
Häggman, Anders; Tsai, Geoff; Elsen, Catherine ULg et al

in Journal of Mechanical Design (2015), 137(7), 13

Gathering user feedback on provisional design concepts early in the design process has the potential to reduce time-to-market and create more satisfying products. Among the parameters that shape user ... [more ▼]

Gathering user feedback on provisional design concepts early in the design process has the potential to reduce time-to-market and create more satisfying products. Among the parameters that shape user response to a product, this paper investigates how design experts use sketches, physical prototypes, and computer-aided design (CAD) to generate and represent ideas, as well as how these tools are linked to design attributes and multiple measures of design quality. Eighteen expert designers individually addressed a 2 hr design task using only sketches, foam prototypes, or CAD. It was found that prototyped designs were generated more quickly than those created using sketches or CAD. Analysis of 406 crowdsourced responses to the resulting designs showed that those created as prototypes were perceived as more novel, more aesthetically pleasing, and more comfortable to use. It was also found that designs perceived as more novel tended to fare poorly on all other measured qualities. [less ▲]

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See detailSketch-Based Interfaces for Modeling and Users' needs: redefining connections. Studies in Architecture and Product Design.
Elsen, Catherine ULg; Demaret, Jean-Noël ULg; Yang, Maria et al

in AI EDAM: Artificial Intelligence for Engineering Design Analysis and Manufacturing (2012), 26

The goal of this paper is to reexamine assumptions about Sketch-Based Interfaces for Modeling in the context of designers’ needs and practices. Research questions examine (i) the type of sketch support ... [more ▼]

The goal of this paper is to reexamine assumptions about Sketch-Based Interfaces for Modeling in the context of designers’ needs and practices. Research questions examine (i) the type of sketch support and (ii) the timing of support. Both concepts try to determine when, what, why and how to augment design processes in a way that is useful to designers. Two experiments (one in architecture and one in product design) based on ergonomics theory are conducted and intend to question some of these assumptions. The “Port Zeeland” experiment examines how twenty novices perceive and copy a blurred architectural sketch, which provides clues for a sketch interpretation system. “Tragere” experiment studies how 12 professional product designers, some of whom are “idea-generators” and others “idea-pursuers”, perceive, recognize and handle a design sketch. The results take a designer’s point of view in assessing the timing and value of sketch assistance in product design. The quantitative data analysis provides rich clues about when, why and how product sketches should be supported. The paper explores the strategies developed by designers to perceive and recognize graphical content, and discusses the generation of 3D volumes, the univocity state between sketches and 3D models, and the treatment of features in freehand sketches. The paper concludes with observations on the timing and value of support, as first integrated in NEMo, a tool for early stage architectural design, and then in PEPS3, an early stage framework for product design. [less ▲]

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