HW2_AnswerKey_2007f

HW2_AnswerKey_2007f - IOE 333: Homework #2 Answer Key...

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IOE 333: Homework #2 Answer Key PROBLEM 1: (40 pts, 4 pts each) a. Why is it important to study human variability for design purposes? List six different ways humans can vary according to your textbook. Which of these might be important to consider when designing counter heights for Macdonald s restaurants? Why? Populations range in size and if this is not accounted for in design, then products will only accommodate a certain portion of one population and be uncomfortable or impossible to use by other parts of the population. 1. Age 2. Sex 3. Race and Ethnic Group 4. Occupation 5. Generational 6. Transient Diurnal When designing counter heights for Macdonald s, we want to consider both the workers and customers for items such as: Sex: Females are generally smaller in stature than males; shorter workers need lower counter heights Race: Which population are predominantly the customers and/or workers of a given store? Macdonald s is global should counter heights be different in different countries? Age: if customers are predominantly older, we may consider lowering the counter height to suit their needs better Other answers may be acceptable depending upon your reasoning. b. Discuss the major differences between civilian and military anthropometric data. Most available anthropometric data was acquired using military personnel. It is costly to develop these data, especially for paying civilians to participate. Sample sizes for civilian databases are often smaller than military ones. Military personnel go through a selection process and are also held to higher physical standards than the average civilian, skewing the
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anthropometric data. Military data has less variation than civilian data. c. Describe the relationship between backrest inclination, lumbar support and low back disc pressure. Give biomechanical/physiological reasons why lumbar support might have the effect that it does. You should be describing the graph CP 163 Figure 5. As backrest inclination angle increases, and as lumbar support increases, disc pressures decreases. Lumbar support helps to maintain the natural curvature of the lumbar spine (lordosis) which usually decreases when a person sits or completely changes direction in slouched postures. The natural curvature of the lumbar spine is associated with lower disc pressures. d. What is the normal line of sight ? Does placing information or displays within the normal line of sight insure that it will be processed by the person? Why or why not? The normal line of sight is 10 to 15 degrees below the horizontal. Placing information or displays within the normal line of sight does not insure that it will be processed by the person for many reasons. These reasons may include: poor display design in terms of color, illumination, clutter, inattention etc. e.
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HW2_AnswerKey_2007f - IOE 333: Homework #2 Answer Key...

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