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Anthropometry: Understanding Human Variability and Job Design

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Presentation Transcript

  1. Anthropometry

  2. Homework • Read Stack Chapter 3 • Study the Review Questions on p. 74 • Complete HW Anthro from the course website.

  3. Questions • How tall are people nowadays? • How far can we reach? • How high do we sit? • How strongly can we push with a hand or foot? • How does the body develop strength? • What are our work capabilities? • Can we use this knowledge to make work easy and effective?

  4. Human Variability • Size • Range of Motion • Strength • Endurance • Stress tolerance • Intelligence • Dexterity • etc.

  5. Selection vs. Job Modification • Assume a heavy box must be moved from Point A to Point B • Selection: Select a strong person (Fit the Person to the Job) • Job Modification: Redesign the job so almost anyone can do it (split the load, MMH aid) (Fit the Job to the Person)

  6. Job Design • Try to maximize the population accommodation • But, account for the additional cost that may be incurred • Do we want to design a fighter plane to accommodate a 6’10” pilot?

  7. Anthropometry • The measure of humans • Demonstration

  8. The Story of Lacy and Andrew • Does one size fit all? • Lacy is 4’ 10” (147 cm) • Andrew is 6’ 10” (208 cm)

  9. Love conquers all – even anthropometry!

  10. Normal Distribution

  11. Anthropometric Design Principles • Designing for the average • Typical or default • McDonalds seating • Designing for the extremes • Doorways, reach distances • Designing for the range • 5th %tile female to 95 %tile male • 5’ female to 6’ 2” male • ADJUSTABILITY!

  12. Functional Anthropometric Data • Adjustments/Allowances to nude data: • shoe sole: add 1” males, 0.6” females; 2 lb • clothing increases torso breadth by 0.3”; torso circumference by 0.6”; 1 lb

  13. Anthropometry Problem #1 • Dr. Kerk is 6’1” tall. What percentile is his stature among US Adult males?

  14. Anthropometry Problem #2 • What percentage of US Adult females are taller than 5’ tall?

  15. Design Problem • Design the vertical adjustment range for a horizontal standing work surface that will accommodate knuckle height to elbow height for 95% of US Adult males and females.

  16. Homework • Read Stack Chapter 3 • Study the Review Questions on p. 74 • Complete HW Anthro from the course website.

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