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Considering Secular and Demographic Trends in Designing for Present and Future Populations

[+] Author Affiliations
Charlotte de Vries, Christopher J. Garneau, Gopal Nadadur, Matthew B. Parkinson

The Pennsylvania State University, University Park, PA

Paper No. DETC2010-28879, pp. 391-398; 8 pages
  • ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 1: 36th Design Automation Conference, Parts A and B
  • Montreal, Quebec, Canada, August 15–18, 2010
  • Conference Sponsors: Design Engineering Division and Computers in Engineering Division
  • ISBN: 978-0-7918-4409-0 | eISBN: 978-0-7918-3881-5
  • Copyright © 2010 by ASME


In products designed for human variability, the anthropometry (body measurements) of the target user population constitutes a primary source of variability that must be considered in the optimization of the spatial dimensions of the product. Accommodation, which describes the ability of a user to interact with a device or environment in their preferred manner, is a key measure of its performance. Other studies have considered various methods for accounting for the variability in anthropometry in a target user population to calculate estimated accommodation, but few have explicitly considered the effects of secular trends and demographic changes over time. This paper considers these changes in the context of a case study involving truck drivers and cab geometry. The truck driver populations are used to illustrate changes in body size and shape over a 30-year period and show how they affect user acceptability of designs. Changes in the gender split of the driver population are also considered, and are shown to have a significant effect on accommodation. The work demonstrates that secular trends and demographic changes over time significantly affect accommodation, but a well designed product will be more robust to these changes.

Copyright © 2010 by ASME



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