Anthropometry

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Anthropometry

• IENG 321
• SDSMT
• Spring 2005

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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?

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Human Variability

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

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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)

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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 610 pilot?

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Anthropometry

• The measure of humans
• Demonstration

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The Story of Lacy and Andrew

• Does one size fit all?
• Lacy is 4 10 (147 cm)
• Andrew is 6 10 (208 cm)

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Love conquers all even anthropometry!
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Normal Distribution
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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!

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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

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Anthropometry Problem 1

• Dr. Kerk is 61 tall. What percentile is his
  stature among US Adult males?

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Anthropometry Problem 2

• What percentage of US Adult females are taller
  than 5 tall?

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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.

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