Chapter 10 Anthropometry.docx

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Western University
Management and Organizational Studies
Management and Organizational Studies 3305A/B
Suzanne Kearns

Chapter 10 ANTHROPOMETRICS October 9, 2013 W HAT IS ANTHROPOMET?Y  Anthro = “man”  Metrics = “measure” o Literally, “measure of man”  Anthropometrics are the study + measurement of human dimensions o Used to redesign systems based on body dimensions  Can be rejected from air crew selection if body doesn’t “fit” the machines  Takes into account strength and muscle mass  Must be able to utilize functions W HERE IS ANTHROPOMETRY U?ED  Used in the design of o Clothing Asians have smaller sizes o Bicycles o Automobiles o Furniture o Hand-tools  There are a wide range of variables o Example: between the smallest female and the tallest male  The male will be 30-40% taller  The male will be 100% heavier  The male will be 500% stronger  We want to increase comfort… want to maximize thinking capacity for tasks  performance EXAMPLES IW ORKSPACED ESIGN  Displays located so high that operators must stand on ladders to read values  In some US Navy aircraft o 10% of controls are beyond reach of tallest aviators o 70% of emergency controls were beyond reach of shortest aviators  We don’t design things to match EVERYONE, because it’d be expensive  People are different sizes HUMAN VARIABILITY  Sex variability o Men are larger (women 92% of men)  Racial and ethnic group variability o If a piece of equipment was designed to fit 90% of the male US population, it would fit  80% of Frenchmen  65% of Italians  45% of Japanese  25% of Thai  10% of Vietnamese o Black people have longer arms o Japanese have longer torsoes  Generational variability o 1cm per decade gain in height  Transient diurnal variability o 2.2lbs due to water; throughout the day, your body will change shape o Height decrease as much as 5cm  Age variability  Occupational variability o Certain traits will give competitive advantage (i.e. short  jockeys; tall  basketball player) STATISTICAL ANALYSIS  Normal distribution o Symmetrical, bell-shaped curve o Mean – the “average” amount of something  Percentiles o In design, anthropometry is most often represented by percentiles o Percentage represents the proportion of population which will be able to use the design  Example: seats are designed using the 50 percentile of male hip breadth  A lot of our data comes from military… this is not representative  Why wouldn’t you design everything to fit 100% of the population? o There are extreme ends of the spectrum, called outliers  Expensive W HERE DOES THE ANTHROPOMETRIC DATA COME FR?M  Anthropometric surveys are o Time-consuming o Labour-intensive o Expensive  Most anthropometric surveys were done in the military o What is the major confound with this? STRUCTURAL AND FUNCTIONAL DATA  Structural data o Data collected whi
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