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Functional Representations In Conceptual Design: A First Study In Experimental Design And Evaluation

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Conference

2005 Annual Conference

Location

Portland, Oregon

Publication Date

June 12, 2005

Start Date

June 12, 2005

End Date

June 15, 2005

ISSN

2153-5965

Conference Session

Potpourri Design

Page Count

17

Page Numbers

10.652.1 - 10.652.17

Permanent URL

https://peer.asee.org/14271

Download Count

38

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Paper Authors

author page

Michael Van Wie

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Kristin Wood

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Robert Stone

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Julie Linsey

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Matthew Green

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Abstract
NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract

Functional Representations in Conceptual Design: A First Study in Experimental Design and Evaluation

Julie S. Linseya, Matthew G. Greena, Michael Van Wieb, Kristin L. Wooda, and Robert Stoneb a The University of Texas at Austin/ bUniversity of Missouri-Rolla

Abstract

Functional modeling is an abstraction technique intended to help engineering designers perform conceptual design. Functions are constructs that describe a transformation between an input flow and an output flow. A primary characteristic of functions is their independence from the physical aspects of a device or artifact. In this sense, functions are form independent and deliberately lack reference to geometry that would otherwise describe how a design solution is physically instantiated. This form independence is generally thought to facilitate designer thinking and reasoning about designs in a manner that benefits designer performance. The purpose of this work is to develop an experimental method with metrics to examine the effects of functional modeling on designer performance in a controlled setting and to test the hypothesis that functional modeling has a positive impact on designer performance.

Our approach is to test the effectiveness of concept generation by measuring a carefully selected set of parameters. The values of these parameters are determined from the results of a controlled conceptual design exercise. This approach effectively circumvents the need to perform protocol analyses of the engineers. Instead, the results of an experimental design task such as a set of concept sketches and descriptions are used as a data source. Recent work in the design research community has provided examples of how to relate empirical results of this form to underlying performance parameters of interest. Outcomes of this research are an improved experimental technique, a refined set of metrics, and an improved understanding of the manner and degree to which functional modeling supports conceptual design practice and design education. This study shows that functional modeling, for the experimental parameters and design problem selected, is indistinguishable from the experimental control and does not inhibit the idea generation process. While this result is incomplete to address the hypothesis, important contributions of the study include a development and investigation of general experimental metrics, a greater understanding of how to design and structure concept generation experiments, and the need to empower participants with either inventive functions or with a full-fledged functional methodology.

Keywords: functional modeling, design method effectiveness, empirical design study, conceptual design, concept generation

Proceedings of the 2005 American Society for Engineering Education Annual Conference & Exposition Copyright © 2005, American Society for Engineering Education

Van Wie, M., & Wood, K., & Stone, R., & Linsey, J., & Green, M. (2005, June), Functional Representations In Conceptual Design: A First Study In Experimental Design And Evaluation Paper presented at 2005 Annual Conference, Portland, Oregon. https://peer.asee.org/14271

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