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A Review of the Design Intent Concept in the Context of CAD Model Quality Metrics

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2014 ASEE Annual Conference & Exposition


Indianapolis, Indiana

Publication Date

June 15, 2014

Start Date

June 15, 2014

End Date

June 18, 2014



Conference Session

Advances in CAD with Emphasis on Dimensioning

Tagged Division

Engineering Design Graphics

Page Count


Page Numbers

24.100.1 - 24.100.10



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Paper Authors

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Jeffrey M. Otey Texas A&M University Orcid 16x16


Pedro Company P.E. Universitat Jaume I

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Prof. Company teaches engineering graphics, mainly in industrial engineering, but also in mechanical engineering and industrial design. He received his Ph.D. in mechanical engineering from the Polytechnic University of Valencia, Spain (UPV) in 1989. His research fields of interest are centered on computer-aided design and sketch-based modeling, with more than 30 papers and communications published on those areas. Now he is taking part in the development and applicability of a new sketch-based modeling interface (see He also has been involved in emotional design and collaborative product engineering. (

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Manuel Contero Universitat Politècnica de València

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Manuel Contero is a full professor of engineering graphics and CAD with the graphic engineering department at the Universitat Politécnica de Valencia, Spain (UPV). He earned an M.Sc. degree in electrical engineering in 1990, and a Ph.D. in industrial engineering in 1995, both from UPV. In 1993 he joined Universitat Jaume I of Castellón, Spain (UJI) as an assistant professor, promoted to associate professor in 1997. In 2000 he returned to UPV, being appointed full professor in 2008. His research interests focus on sketch-based modeling, collaborative engineering, human-computer interaction, development of spatial abilities, and technology enhanced learning.

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Jorge Dorribo Camba Texas A&M University

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A Review of the Design Intent Concept in the Context of CAD Model Quality MetricsFrom the perspective of Computer Aided Design (CAD), Design Intent is a term commonlydefined as a model’s anticipated behavior once it undergoes alteration (ex. will holes continue toshare concentricity with an arc should the dimensions be modified?). Presently, there does notexist a standardized manner in which to explicitly communicate or deduce a CAD model’sdesign intent. The design tree (feature tree or history tree) in most parametric modelingapplications offers implicit depiction of design intent, but not all descriptive information isadequately conveyed (ex. a concentric constraint is not recorded in the design tree and is onlyaccessible if the requisite sketch is opened and examined). An explicit representation would beimmensely more valuable, especially for models with complex geometric features or for thoseworking in a collaborative design environment. This paper reviews current understanding ofdesign intent (with an exploration of its relationship to Design Rationale), including applicableorganizational CAD standards and industry style guidelines (where available).Design Intent, however, is but one possible dimension of a model’s quality. Other qualitydimensions could include, but are not limited to, validity, completeness, consistency,conciseness, etc. The authors additionally propose to examine how all dimensions of qualitymodels can be expressed in appropriate assertions and how systemized proper modeling practicescan be applied to key dimensions in a categorized method. These practices can then provide forthe development of a novel set of modeling rubrics that emphasize model quality as the centralgoal of CAD learners, as well as provide a method for suitable quality model assessment.

Otey, J. M., & Company, P., & Contero, M., & Camba, J. D. (2014, June), A Review of the Design Intent Concept in the Context of CAD Model Quality Metrics Paper presented at 2014 ASEE Annual Conference & Exposition, Indianapolis, Indiana. 10.18260/1-2--19992

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